Very cool and informative literature!
Sansui Product History: Amplifiers 1967-2000
- Thread starter JimEGR
- Start date
Very cool and informative literature!
bolero
Super Member
While researching parts I found some timeline related clues:
The boards in the AU-7700 are named F-2092 to F-2097. ( edit- I just spotted F-2472, F-2473 in there too )
The AU-6600 has 2 derivative boards named F-2092A, F-2097A. Then it has F-2098, F-2099 continuing on from the F-2097 in the AU-7700.
The rest of the AU-6600 boards are numbered F-24xx.
So it would appear the AU-7700 was developed first.
Tracking which boards were used in which units could be useful to help figure out production timelines.
The boards in the AU-7700 are named F-2092 to F-2097. ( edit- I just spotted F-2472, F-2473 in there too )
The AU-6600 has 2 derivative boards named F-2092A, F-2097A. Then it has F-2098, F-2099 continuing on from the F-2097 in the AU-7700.
The rest of the AU-6600 boards are numbered F-24xx.
So it would appear the AU-7700 was developed first.
Tracking which boards were used in which units could be useful to help figure out production timelines.
Hi,
There is two documents in the Sansui section of the AK Digital Docs, one is circuit boards - where used, and the other is circuit boards used by model. Not sure how up to date these are and how much of the later JDM product is represented.
Cheers
John
bolero
Super Member
Something else I discovered: the 8080db/9090db both have a TU-7900 built into them, for their tuner section.
F-2549 is listed as the AM FM tuner circuit board
F-1519 is listed as the front end pack
That's the guts of a TU-7900 minus the power supply. And the F-2550 multipath circuit board.
Although there may be some component changes?
F-2549 is listed as the AM FM tuner circuit board
F-1519 is listed as the front end pack
That's the guts of a TU-7900 minus the power supply. And the F-2550 multipath circuit board.
Although there may be some component changes?
Thanks @Peter lye @bolero @skippy124 @GrisPato! Once I finish up my AU-317 restoration I'll have some time to update the list.
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bolero
Super Member
I wonder if that's the reason the tuner power supply runs so hot in the 8080/9090db? Whatever Sansui did to power the tuner was a compromise, compared to the full power supply in a TU-7900?
People have been modding 8080/9090db's with heatsinks & moving the resistors over to the chassis for better cooling
People have been modding 8080/9090db's with heatsinks & moving the resistors over to the chassis for better cooling
V. 11/21/2022
--- First Generation ---
1967 AU-777 25 watts
1968 AU-222 18 watts
1968 AU-555 20 watts
1969 AU-777D 30 watts (JDM version of AU-777A)
1969 AU-777A 30 watts
1970 AU-555A 25 watts
1970 AU-666 35 watts
1970 AU-888 45 watts
1970 AU-999 50 watts
1971 AU-101 15 watts
1972 AU-505 12 watts
1973 AU-2000 13 watts (JDM version AU-505)
--- Second Generation ---
1972 AU-6500 30 watts
1972 AU-7500 32 watts
1972 AU-9500 75 watts
1973 AU-8500 60 watts
1974 AU-22 13 watts (JDM)
1974 AU-33 20 watts (JDM)
1974 AU-2200 10 watts
1974 AU-4400 20 watts
1974 AU-5500 35 watts
1974 AU-6600 42 watts
1974 AU-7700 54 watts
1974 AU-7900 80 watts
1975 AU-3900 25 watts
1975 AU-4900 38 watts
1975 AU-5900 45 watts
1975 AU-6900 60 watts
1976 AU-2900 15 watts
1975 AU-1100 22 watts (JDM)
1975 AU-3300 35 watts (JDM)
1975 AU-1500 22 watts (JDM)
1975 AU-3500 35 watts (JDM)
"Professional Series"
1975 AU-9900 80 watts
1975 AU-11000 110 watts
1975 AU-20000 170 watts
1977 AU-9900A 80 watts
1977 AU-11000A 110 watts
1977 AU-10000 110 watts (JDM)
--- Third Generation ---
1977 AU-207 30 watts (JDM version of AU-217)
1977 AU-307 50 wats (JDM version of AU-317)
1977 AU-507 60 watts (JDM version of AU-417)
1976 AU-607 65 watts (JDM version of AU-517)
1976 AU-707 85 watts (JDM version of AU-717)
1977 AU-117 15 watts
1977 AU-217 30 watts
1977 AU-317 50 watts
1977 AU-417 60 watts
1977 AU-517 65 watts
1977 AU-717 85 watts
1977 AU-710 85 watts (AAFES version of AU-717)
1978 AU-D607 70 watts (JDM version of AU-519)
1978 AU-D707 90 watts (JDM version of AU-819)
1978 AU-D907 100 watts (JDM version of AU-919)
1978 AU-D907 Limited 100 watts (JDM)
1978 AU-919 100 watts
1979 AU-107ii 25 watts (JDM version of AU-117ii)
1979 AU-207ii 40 watts (JDM version of AU-217ii)
1979 AU-307ii 60 watts (JDM version of AU-317ii)
1979 AU-117ii 25 watts
1979 AU-217ii 40 watts
1979 AU-317ii 60 watts
1979 AU-417 65 watts
1979 AU-519 70 watts
1979 AU-719 90 watts
1979 AU-819 90 watts
--- Fourth Generation ---
1978 AU-X1 160 watts
- - - - SOLID STATE SEPARATES THROUGH 1976 - - - -
First Generation Pre Amplifiers
1968 TC-505 (pre amplifier w/tuner: preceiver) (JDM)
1970 CA-606 (JDM)
First Generation Power Amplifiers
1968 BA-60 20 watts
1968 BA-90 28 watts
1971 BA-100 30 watts (JDM)
1970 BA-150 45 watts (JDM)
Second Generation Pre Amplifiers
"Definition Series"
1975 CA-3000
"Professional Series"
1976 CA-2000
Second Generation Power Amplifiers
"Definition Series"
1975 BA-3000 170 watts
1975 BA-5000 300 watts
"Professional Series"
1976 BA-2000 110 watts
1975 BA-1000 45 watts (VFET amplifier)
Sources:
The Best Of Sansui
Sansui Sound
Classic Audio / Sansui
Audio Database / Sansui
Audio Heritage / Sansui
Hifi Engine / Sansui
Hifido
History and Chronology of SANSUI Amplifiers
Ishino Lab
Niji - Sansui 07
The Vintage Knob
@AUD101
@bolero
@GrisPato
@Hyperion
@JoseHH
@KeithD
@LBPete
@mjs1
@Peter lye
@pete_mac
@rickb119
@Sansuiman
@sansui 74
AK - Sansui Serial Number Report
AK - Sansui Years of Manufacture
AK - A list of Sansui "firsts", a little history
AK - AU-607, AU-707, AU-907?
- Organized chronologically, separate blocks of JDM and International, power low to high
- JDM = Japanese Domestic Market
- AAFES = Army & Air Force Exchange Service
- "Generations" currently defined by major form factor changes, and don't necessarily indicate a circuit evolution.
- Please reply with suggestions, additions, corrections
--- First Generation ---
1967 AU-777 25 watts
1968 AU-222 18 watts
1968 AU-555 20 watts
1969 AU-777D 30 watts (JDM version of AU-777A)
1969 AU-777A 30 watts
1970 AU-555A 25 watts
1970 AU-666 35 watts
1970 AU-888 45 watts
1970 AU-999 50 watts
1971 AU-101 15 watts
1972 AU-505 12 watts
1973 AU-2000 13 watts (JDM version AU-505)
--- Second Generation ---
1972 AU-6500 30 watts
1972 AU-7500 32 watts
1972 AU-9500 75 watts
1973 AU-8500 60 watts
1974 AU-22 13 watts (JDM)
1974 AU-33 20 watts (JDM)
1974 AU-2200 10 watts
1974 AU-4400 20 watts
1974 AU-5500 35 watts
1974 AU-6600 42 watts
1974 AU-7700 54 watts
1974 AU-7900 80 watts
1975 AU-3900 25 watts
1975 AU-4900 38 watts
1975 AU-5900 45 watts
1975 AU-6900 60 watts
1976 AU-2900 15 watts
1975 AU-1100 22 watts (JDM)
1975 AU-3300 35 watts (JDM)
1975 AU-1500 22 watts (JDM)
1975 AU-3500 35 watts (JDM)
"Professional Series"
1975 AU-9900 80 watts
1975 AU-11000 110 watts
1975 AU-20000 170 watts
1977 AU-9900A 80 watts
1977 AU-11000A 110 watts
1977 AU-10000 110 watts (JDM)
--- Third Generation ---
1977 AU-207 30 watts (JDM version of AU-217)
1977 AU-307 50 wats (JDM version of AU-317)
1977 AU-507 60 watts (JDM version of AU-417)
1976 AU-607 65 watts (JDM version of AU-517)
1976 AU-707 85 watts (JDM version of AU-717)
1977 AU-117 15 watts
1977 AU-217 30 watts
1977 AU-317 50 watts
1977 AU-417 60 watts
1977 AU-517 65 watts
1977 AU-717 85 watts
1977 AU-710 85 watts (AAFES version of AU-717)
1978 AU-D607 70 watts (JDM version of AU-519)
1978 AU-D707 90 watts (JDM version of AU-819)
1978 AU-D907 100 watts (JDM version of AU-919)
1978 AU-D907 Limited 100 watts (JDM)
1978 AU-919 100 watts
1979 AU-107ii 25 watts (JDM version of AU-117ii)
1979 AU-207ii 40 watts (JDM version of AU-217ii)
1979 AU-307ii 60 watts (JDM version of AU-317ii)
1979 AU-117ii 25 watts
1979 AU-217ii 40 watts
1979 AU-317ii 60 watts
1979 AU-417 65 watts
1979 AU-519 70 watts
1979 AU-719 90 watts
1979 AU-819 90 watts
--- Fourth Generation ---
1978 AU-X1 160 watts
- - - - SOLID STATE SEPARATES THROUGH 1976 - - - -
First Generation Pre Amplifiers
1968 TC-505 (pre amplifier w/tuner: preceiver) (JDM)
1970 CA-606 (JDM)
First Generation Power Amplifiers
1968 BA-60 20 watts
1968 BA-90 28 watts
1971 BA-100 30 watts (JDM)
1970 BA-150 45 watts (JDM)
Second Generation Pre Amplifiers
"Definition Series"
1975 CA-3000
"Professional Series"
1976 CA-2000
Second Generation Power Amplifiers
"Definition Series"
1975 BA-3000 170 watts
1975 BA-5000 300 watts
"Professional Series"
1976 BA-2000 110 watts
1975 BA-1000 45 watts (VFET amplifier)
Sources:
The Best Of Sansui
Sansui Sound
Classic Audio / Sansui
Audio Database / Sansui
Audio Heritage / Sansui
Hifi Engine / Sansui
Hifido
History and Chronology of SANSUI Amplifiers
Ishino Lab
Niji - Sansui 07
The Vintage Knob
@AUD101
@bolero
@GrisPato
@Hyperion
@JoseHH
@KeithD
@LBPete
@mjs1
@Peter lye
@pete_mac
@rickb119
@Sansuiman
@sansui 74
AK - Sansui Serial Number Report
AK - Sansui Years of Manufacture
AK - A list of Sansui "firsts", a little history
AK - AU-607, AU-707, AU-907?
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OK I think I captured all of the new contributions - since 11/04/22. Let me know if there is anything missing.
@Peter lye the website History and Chronology of SANSUI Amplifiers is a fantastic resource and picks up pretty much where the list current stops - thanks!
@GrisPato and others what do you think about design evolution divisions - what and where in the chronology?
RE @GrisPato earlier post -
"For example:
I would call first generation SS:
AU-777
AU-222
AU-555
AU-999
Second generation:
AU-666
AU-888
The following models are like a mix between first and second ( to be honest this is also applying to the AU-999) Cap coupled and quasi complementary outputs with the cosmetic design of the DC coupled circuit.
( For the AU-999 the opposite except the quasi complementary outputs).
AU-555A
AU-505
AU-101
But, I can live with calling all these models first generation. I would prefer to have a difference between quasi/ full complementary.
After this come the AU-x500 models
As far as I know this was a small line up.
AU-6500
AU-7500
AU-8500
AU-9500
There circuit design develops through the AU-5500/7700 and AU-2900/7900.
Here the cosmetic design is going back to the AU-777 with a twist.
Is this second generation?
The cosmetic design changes with the AU-5500-7700 through the AU-2900-7900, circuit is basically the same.
For me this is at least third generation.
Then it gets easy to the next generation ( fourth?), AU-607/707, different cosmetic design, layout and circuit.
For me the AU-D607/707/907/X1/907LIMITED belong to the same generation, but not to the AU-607/707, so fifth generation.
Why? In the AU-607/707 only dual-jfet differential in the output stage, no diamond differential, no high speed circuit and transistors in the Darlington stage.
I am curious what other people think of this generation division!"
@Peter lye the website History and Chronology of SANSUI Amplifiers is a fantastic resource and picks up pretty much where the list current stops - thanks!
@GrisPato and others what do you think about design evolution divisions - what and where in the chronology?
RE @GrisPato earlier post -
"For example:
I would call first generation SS:
AU-777
AU-222
AU-555
AU-999
Second generation:
AU-666
AU-888
The following models are like a mix between first and second ( to be honest this is also applying to the AU-999) Cap coupled and quasi complementary outputs with the cosmetic design of the DC coupled circuit.
( For the AU-999 the opposite except the quasi complementary outputs).
AU-555A
AU-505
AU-101
But, I can live with calling all these models first generation. I would prefer to have a difference between quasi/ full complementary.
After this come the AU-x500 models
As far as I know this was a small line up.
AU-6500
AU-7500
AU-8500
AU-9500
There circuit design develops through the AU-5500/7700 and AU-2900/7900.
Here the cosmetic design is going back to the AU-777 with a twist.
Is this second generation?
The cosmetic design changes with the AU-5500-7700 through the AU-2900-7900, circuit is basically the same.
For me this is at least third generation.
Then it gets easy to the next generation ( fourth?), AU-607/707, different cosmetic design, layout and circuit.
For me the AU-D607/707/907/X1/907LIMITED belong to the same generation, but not to the AU-607/707, so fifth generation.
Why? In the AU-607/707 only dual-jfet differential in the output stage, no diamond differential, no high speed circuit and transistors in the Darlington stage.
I am curious what other people think of this generation division!"
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Thanks for posting that. Great read and I learned a lot, particularly the paragraph in the middle column of page 54 about the "feedforward" technique and that Sansui was the only manufacturer implementing it at the time of this article. Now I'll be on the hunt for a Sansui FF amp!
That was a great article. Found reference to in an amplifier design book. I've also been spending some time on Hi-Fi Engine browsing the Sansui documents - that place is a gold mine!
Here's one on FeedForward -
https://www.hifiengine.com/manual_library/sansui/super-feedforward-system.shtml
General Doc's -
https://www.hifiengine.com/manual_library/sansui.shtml?category=general-document
Catalogue's -
https://www.hifiengine.com/manual_library/sansui.shtml?category=catalogue
Lot's to learn from the former marketing arm of Sansui!
Last edited:
ignoramustot
Active Member
Picking up where the product history list left off, last October. Solid State Integrated amplifiers, 1978+.
It is pretty clear Sansui did not stop innovating when the Golden Era and Yen challenges closed that Hi-Fi chapter, internationally. The looks may have changed, but the drive for Sansui certainly looked strong in Japan through the late 90's! There are folks here with greater awareness of this period. And this is a very complicated Sansui product period to chart. Please comment, contribute and correct! Aiming for accuracy.
Once the list is cleaned up and near or at accuracy I would like to document the important topology step changes for the entire SS Integrated and Separate list, 1967-1999.
Sources for this period:
http://www.sansui.us/Amplifiers.htm
https://audio-heritage.jp/SANSUI/index.html
https://audio-database.com/SANSUI/index.html
https://www.hifiengine.com/manual_library/sansui.shtml
Release dates cross referenced to the ESAK Serial Number Report
How to Best the Sansui X Balanced Amps
Best breakdown on AK(probably) of this generation right Here thanks @fojica
X Balanced
Thanks @Qsiris Here
The 'alpha' name was applied to x-balanced models from 1986 onward and reflects an evolution of the original x-balanced circuitry.
Thanks @pete_mac Here
L Extra - first use of nonmagnetic transistors, all later versions had these
DR and later - upgraded circuitry and components
XR and later - last circuitry upgrade (hyper speed forward)
Thanks @Qsiris Here
The AU-D11 II is a special version of the AU-D707X...
Thanks @JoseHH More here
V. 03/20/23 1978+
----- INTEGRATED AMPLIFIERS ----
1978 AU-X1 160 watts
1979 AU-D607 70 watts (JDM)
1979 AU-D707 90 watts (JDM)
1979 AU-D907 100 watts (JDM)
1979 AU-D907 Limited 100 watts (JDM)
1980 AU-719 90 watts
"Super FeedForward"
1980 AU-D9 95 watts
1980 AU-D11 120 watts
1980 A-40 25 watts
1980 A-60 45 watts
1980 A-80 65 watts
1981 AU-D607F Extra 80 watts (JDM)
1981 AU-D707F Extra 100 watts (JDM)
1981 AU-D907F Extra 130 watts (JDM)
1981 AU-X11 160 watts
1981 AU-D55F 50 watt (JDM)
1982 AU-D5 65 watts
1982 AU-D7 (silver or black) 80 watts
1982 A-5 25 watts
1982 A-7 45 watts
1982 A-9 65 watts
1982 A-500 (silver and black) 30 watts
1982 A-501 30 watts
1982 A-Classique501 30 watts
1982 A-505 30 watts
1982 A-510 (silver and black) 30 watts
1982 A-700 55 watts
1982 A-707 50 watts
1982 A-900 70 watts
1982 A-909 70 watts
1982 A-930P 70 watts
1982 A-1000 100 watts
1982 A-1001 100 watts
1982 A-1010 100 watts
1982 A-1100 100 watts
1982 A-1100P 100 watts
1982 A-1100R 100 watts
1982 A-1110 100 watts
1982 A-1130 100 watts
1982 A-1130P 100 watts
1982 A-1200 125 watts
1982 A-1200P 125 watts
1982 A-1200R 125 watts
1982 A-1230 125 watts
1982 A-1230P 125 watts
1982 A-1500R 160 watts
1983 AU-M7 25 watts
1983 AU-M70 25 watts
1983 AU-M77 25 watts
1983 A-M800 25 watts
1983 A-M9 70 watts
"Super FeedForward"
1983 AU-D101 30 watts (UK/EUR 220/240V)
1983 AU-D22 35 watts
1983 AU-D33 50 watts
1983 AU-D55X 70 watts
1983 AU-D77X 110 watts
1983 AU-D11 120 watts
1983 *AU-D11ii 130 watts The AU-D11 II is a special version of the AU-D707X...Here
1983 AU-D607G Extra 90 watts (JDM)
1983 AU-D907G Extra 110 watts (JDM)
1983 AU-D907G Extra 130 watts JDM)
1983 A-707 50 watts
1983 AU-909B 70 watts
1983 AU-D7B 80 watts
1984 AU-D507X 80 watts (JDM)
1984 AU-D607X 90 watts (JDM)
1984 AU-D707X 130 watts (JDM)
1984 AU-D907X 160 watts (JDM)
1984 AU-G11X 25 watts
1984 AU-G33X 45 watts
1984 AU-G55X 65 watts
1984 AU-G77X 110 watts
1984 AU-G99X 160 watts
1984 AU-G30X 45 watts
1984 AU-G50X 45 watts
1984 AU-G90X 130 watts
1984 AU-D607X Decade 90 watts (JDM)
1984 AU-D707X Decade 130 watts (JDM)
1984 AU-D907X Decade 160 watts (JDM)
1984 AU-D707XCD Decade 130 watts (JDM)
1985 AU-X111MOS Vintage 110 watts (JDM)
1985 A-500 30 watts
1985 A-710 55 watts
1985 A-730 55 watts
1985 A-770 55 watts
1985 A-M90 70 watts
1985 A-M900 70 watts
1985 A-M99 70 watts
'alpha'
1986 AU-a307 65 watts (JDM)
1986 AU-a507 80 watts (JDM)
1986 AU-a607 90 watts (JDM)
1986 AU-a707 130 watts (JDM)
1986 AU-a907 180 watts (JDM)
1987 AU-a307i 65 watts (JDM)
1987 AU-a507i 80 watts (JDM)
1987 AU-a607i 90 watts (JDM)
1987 AU-a707i 130 watts (JDM)
1987 AU-a907i 160 watts (JDM)
1987 AU-a907i MOS Limited 80 watts (JDM)
1987 AU-X201 30 watts
1987 AU-X301 65 watts
1987 AU-X501 80 watts
1987 AU-X701 100 watts
1987 AU-X901 130 watts
1987 AU-X711 100 watts
1988 AU-X1111MOS Vintage 110 watts (JDM)
1988 AU-a307 65 watts (JDM)
1988 AU-a507 Extra ??? watts (JDM)
1988 AU-a607 Extra 90 watts (JDM)
1988 AU-a707 Extra 130 watts (JDM)
1988 AU-a907 Extra ??? watts (JDM)
1988 AU-a907 Extra ??? watts (JDM)
1989 AU-X111 30 watts
1989 AU-X911DG 100 watts
"L Extra" - first use of nonmagnetic transistors, all later versions had these
1989 AU-a607L Extra 90 watts (JDM)
1989 AU-a707L Extra 130 watts (JDM)
1989 AU-a901L Extra 160 watts (JDM)
1989 AU-a555VS 80 watts (JDM)
1989 AU-a777DG 90 watts (JDM)
1989 AU-a999DG 95 watts (JDM)
"DR and later" - upgraded circuitry and components
1991 AU-a607DR 90 watts (JDM)
1991 AU-a707DR 130 watts (JDM)
1990 AU-a907DR 160 watts (JDM
1991 AU-a 607 MOS Premium 45 watts (JDM)
1992 A-X750 40 watts
1992 AU-a507R 65 watts
"α -X balanced"
1992 AU-a607KX 90 watts (JDM)
1992 AU-a707KX 130 watts (JDM)
1992 AU-a907KX160 watts (JDM)
1992 AU-X701DR ??? watts
"Hyper α -X balanced"
1993 AU-a507XR Series 70 watts (JDM)
1993 AU-a607XR Series 90 watts (JDM)
1993 AU-a707XR Series 130 watts (JDM)
1993 AU-a907XR Series 160 watts (JDM)
1994 AU-a117K 30 watts (JDM)
1994 AU-a317K 55 watts (JDM)
1994 AU-a505XR 60 watts (JDM)
1994 AU-a907 Limited 80 watts (JDM)
1994 A-a7 85 watts (JDM)
1995 AU-607aMRX 90 watts
"Hyper α -X balanced"
1995 AU-a607MR 90 watts (JDM)
1995 AU-a707MR 130 watts (JDM)
1995 AU-a907MR 160 watts (JDM)
1995 AU-X517R 65 watts
1995 AU-X619R 65 watts
1996 AU-07 Anniversary 90 watts (JDM)
1996 A-E350 25 watts
1996 A-E550 55 watts
1996 A-E750 90 watts
1996 A-E770 50 watts
1996 A-E770 75 watts
1997 A-a9 85 watts (JDM)
1997 AU-a205 30 watts (JDM)
1997 AU-a305R 55 watts (JDM)
1997 AU-a305RX 65 watts (JDM)
1997 AU-a505RX 80 watts (JDM)
1998 AU-a507NRA 60 watts (JDM)
1998 AU-a607NRA 80 watts (JDM)
1998 AU-a707NRA 130 watts (JDM)
1998 AU-a907NRA 160 watts (JDM)
1999 AU-405 60 watts (JDM)
1999 AU-a607 NRA ii 80 watts (JDM) (January 1999 - October 1999)
1999 AU-a607 MOS Limited 50 watts (JDM) (December 1999 - August 2000)
1999 AU-111 Vintage (JDM) (novel. tube not solid state will remove from list when finished)
2000 AU-111G Vintage (JDM) (novel. tube not solid state will remove from list when finished)
---- SEPARATES ---
COMING SOON
It is pretty clear Sansui did not stop innovating when the Golden Era and Yen challenges closed that Hi-Fi chapter, internationally. The looks may have changed, but the drive for Sansui certainly looked strong in Japan through the late 90's! There are folks here with greater awareness of this period. And this is a very complicated Sansui product period to chart. Please comment, contribute and correct! Aiming for accuracy.
Once the list is cleaned up and near or at accuracy I would like to document the important topology step changes for the entire SS Integrated and Separate list, 1967-1999.
Sources for this period:
http://www.sansui.us/Amplifiers.htm
https://audio-heritage.jp/SANSUI/index.html
https://audio-database.com/SANSUI/index.html
https://www.hifiengine.com/manual_library/sansui.shtml
Release dates cross referenced to the ESAK Serial Number Report
How to Best the Sansui X Balanced Amps
Best breakdown on AK(probably) of this generation right Here thanks @fojica
X Balanced
Thanks @Qsiris Here
The 'alpha' name was applied to x-balanced models from 1986 onward and reflects an evolution of the original x-balanced circuitry.
Thanks @pete_mac Here
L Extra - first use of nonmagnetic transistors, all later versions had these
DR and later - upgraded circuitry and components
XR and later - last circuitry upgrade (hyper speed forward)
Thanks @Qsiris Here
The AU-D11 II is a special version of the AU-D707X...
Thanks @JoseHH More here
V. 03/20/23 1978+
----- INTEGRATED AMPLIFIERS ----
1978 AU-X1 160 watts
1979 AU-D607 70 watts (JDM)
1979 AU-D707 90 watts (JDM)
1979 AU-D907 100 watts (JDM)
1979 AU-D907 Limited 100 watts (JDM)
1980 AU-719 90 watts
"Super FeedForward"
1980 AU-D9 95 watts
1980 AU-D11 120 watts
1980 A-40 25 watts
1980 A-60 45 watts
1980 A-80 65 watts
1981 AU-D607F Extra 80 watts (JDM)
1981 AU-D707F Extra 100 watts (JDM)
1981 AU-D907F Extra 130 watts (JDM)
1981 AU-X11 160 watts
1981 AU-D55F 50 watt (JDM)
1982 AU-D5 65 watts
1982 AU-D7 (silver or black) 80 watts
1982 A-5 25 watts
1982 A-7 45 watts
1982 A-9 65 watts
1982 A-500 (silver and black) 30 watts
1982 A-501 30 watts
1982 A-Classique501 30 watts
1982 A-505 30 watts
1982 A-510 (silver and black) 30 watts
1982 A-700 55 watts
1982 A-707 50 watts
1982 A-900 70 watts
1982 A-909 70 watts
1982 A-930P 70 watts
1982 A-1000 100 watts
1982 A-1001 100 watts
1982 A-1010 100 watts
1982 A-1100 100 watts
1982 A-1100P 100 watts
1982 A-1100R 100 watts
1982 A-1110 100 watts
1982 A-1130 100 watts
1982 A-1130P 100 watts
1982 A-1200 125 watts
1982 A-1200P 125 watts
1982 A-1200R 125 watts
1982 A-1230 125 watts
1982 A-1230P 125 watts
1982 A-1500R 160 watts
1983 AU-M7 25 watts
1983 AU-M70 25 watts
1983 AU-M77 25 watts
1983 A-M800 25 watts
1983 A-M9 70 watts
"Super FeedForward"
1983 AU-D101 30 watts (UK/EUR 220/240V)
1983 AU-D22 35 watts
1983 AU-D33 50 watts
1983 AU-D55X 70 watts
1983 AU-D77X 110 watts
1983 AU-D11 120 watts
1983 *AU-D11ii 130 watts The AU-D11 II is a special version of the AU-D707X...Here
1983 AU-D607G Extra 90 watts (JDM)
1983 AU-D907G Extra 110 watts (JDM)
1983 AU-D907G Extra 130 watts JDM)
1983 A-707 50 watts
1983 AU-909B 70 watts
1983 AU-D7B 80 watts
1984 AU-D507X 80 watts (JDM)
1984 AU-D607X 90 watts (JDM)
1984 AU-D707X 130 watts (JDM)
1984 AU-D907X 160 watts (JDM)
1984 AU-G11X 25 watts
1984 AU-G33X 45 watts
1984 AU-G55X 65 watts
1984 AU-G77X 110 watts
1984 AU-G99X 160 watts
1984 AU-G30X 45 watts
1984 AU-G50X 45 watts
1984 AU-G90X 130 watts
1984 AU-D607X Decade 90 watts (JDM)
1984 AU-D707X Decade 130 watts (JDM)
1984 AU-D907X Decade 160 watts (JDM)
1984 AU-D707XCD Decade 130 watts (JDM)
1985 AU-X111MOS Vintage 110 watts (JDM)
1985 A-500 30 watts
1985 A-710 55 watts
1985 A-730 55 watts
1985 A-770 55 watts
1985 A-M90 70 watts
1985 A-M900 70 watts
1985 A-M99 70 watts
'alpha'
1986 AU-a307 65 watts (JDM)
1986 AU-a507 80 watts (JDM)
1986 AU-a607 90 watts (JDM)
1986 AU-a707 130 watts (JDM)
1986 AU-a907 180 watts (JDM)
1987 AU-a307i 65 watts (JDM)
1987 AU-a507i 80 watts (JDM)
1987 AU-a607i 90 watts (JDM)
1987 AU-a707i 130 watts (JDM)
1987 AU-a907i 160 watts (JDM)
1987 AU-a907i MOS Limited 80 watts (JDM)
1987 AU-X201 30 watts
1987 AU-X301 65 watts
1987 AU-X501 80 watts
1987 AU-X701 100 watts
1987 AU-X901 130 watts
1987 AU-X711 100 watts
1988 AU-X1111MOS Vintage 110 watts (JDM)
1988 AU-a307 65 watts (JDM)
1988 AU-a507 Extra ??? watts (JDM)
1988 AU-a607 Extra 90 watts (JDM)
1988 AU-a707 Extra 130 watts (JDM)
1988 AU-a907 Extra ??? watts (JDM)
1988 AU-a907 Extra ??? watts (JDM)
1989 AU-X111 30 watts
1989 AU-X911DG 100 watts
"L Extra" - first use of nonmagnetic transistors, all later versions had these
1989 AU-a607L Extra 90 watts (JDM)
1989 AU-a707L Extra 130 watts (JDM)
1989 AU-a901L Extra 160 watts (JDM)
1989 AU-a555VS 80 watts (JDM)
1989 AU-a777DG 90 watts (JDM)
1989 AU-a999DG 95 watts (JDM)
"DR and later" - upgraded circuitry and components
1991 AU-a607DR 90 watts (JDM)
1991 AU-a707DR 130 watts (JDM)
1990 AU-a907DR 160 watts (JDM
1991 AU-a 607 MOS Premium 45 watts (JDM)
1992 A-X750 40 watts
1992 AU-a507R 65 watts
"α -X balanced"
1992 AU-a607KX 90 watts (JDM)
1992 AU-a707KX 130 watts (JDM)
1992 AU-a907KX160 watts (JDM)
1992 AU-X701DR ??? watts
"Hyper α -X balanced"
1993 AU-a507XR Series 70 watts (JDM)
1993 AU-a607XR Series 90 watts (JDM)
1993 AU-a707XR Series 130 watts (JDM)
1993 AU-a907XR Series 160 watts (JDM)
1994 AU-a117K 30 watts (JDM)
1994 AU-a317K 55 watts (JDM)
1994 AU-a505XR 60 watts (JDM)
1994 AU-a907 Limited 80 watts (JDM)
1994 A-a7 85 watts (JDM)
1995 AU-607aMRX 90 watts
"Hyper α -X balanced"
1995 AU-a607MR 90 watts (JDM)
1995 AU-a707MR 130 watts (JDM)
1995 AU-a907MR 160 watts (JDM)
1995 AU-X517R 65 watts
1995 AU-X619R 65 watts
1996 AU-07 Anniversary 90 watts (JDM)
1996 A-E350 25 watts
1996 A-E550 55 watts
1996 A-E750 90 watts
1996 A-E770 50 watts
1996 A-E770 75 watts
1997 A-a9 85 watts (JDM)
1997 AU-a205 30 watts (JDM)
1997 AU-a305R 55 watts (JDM)
1997 AU-a305RX 65 watts (JDM)
1997 AU-a505RX 80 watts (JDM)
1998 AU-a507NRA 60 watts (JDM)
1998 AU-a607NRA 80 watts (JDM)
1998 AU-a707NRA 130 watts (JDM)
1998 AU-a907NRA 160 watts (JDM)
1999 AU-405 60 watts (JDM)
1999 AU-a607 NRA ii 80 watts (JDM) (January 1999 - October 1999)
1999 AU-a607 MOS Limited 50 watts (JDM) (December 1999 - August 2000)
1999 AU-111 Vintage (JDM) (novel. tube not solid state will remove from list when finished)
2000 AU-111G Vintage (JDM) (novel. tube not solid state will remove from list when finished)
---- SEPARATES ---
COMING SOON
Last edited:
Last edited:
Making progress on the 1978-1999 group. I think I have captured every integrated amplifier for this period. Working on adding circuit/branding classifications. And adding hyperlinks to individual piece specs.
I've been gleaning everything I can related to the development of this period. This thread Here with posts by @fojica and conversation with the some other pros and enthusiasts here offer very thorough technical detail.
The plan is to have a complete chronological list of all Sansui solid state integrated amplifiers (and separates) from the 1967 AU-777 20 watts to the 1999 AU-a607 MOS Limited 50 watts with classification by significant steps in topology.
Please comment or correct anything here!
V. 03/20/23 1978+
----- INTEGRATED AMPLIFIERS ----
"Direct Coupled - Diamond Differential"
1978 AU-X1 160 watts
"Direct Coupled - Diamond Differential - Super FeedForward"
1980 AU-D607F 75 watts (JDM)
1980 AU-D707F 95 watts (JDM)
1980 AU-D907F 130 watts (JDM)
"Direct Coupled"
1982 AU-D5 (B)(S) 65 watts
1982 AU-D7 (B)(S) 80 watts
"Direct Coupled - Diamond Differential - Super FeedForward"
1980 AU-D9 95 watts
1980 AU-D11 120 watts
"Direct Coupled"
1980 A-40 25 watts
1980 A-60 45 watts
1980 A-80 65 watts
"Direct Coupled - Diamond Differential - Super FeedForward"
"Extra" = copper plated chassis and non-magnetic elements
1981 AU-D607F Extra 80 watts (JDM)
1981 AU-D707F Extra 100 watts (JDM)
1981 AU-D907F Extra 130 watts (JDM) + MOS-FET
"Direct Coupled - Diamond Differential - Super FeedForward"
1981 AU-X11 160 watts
"Direct Coupled - Super FeedForward"
1981 AU-D55F 50 watt (JDM version of AU-D33)
"Direct Coupled"
1982 A-5 (B)(S) 25 watts
1982 A-7 (B)(S) 45 watts
1982 A-9 (B)(S) 65 watts
"Direct Coupled"
1982 A-500 (B)(S) 30 watts
1982 A-501 30 watts
1982 A-Classique501 30 watts
1982 A-505 30 watts
1982 A-510 (silver and black) 30 watts
1982 A-700 55 watts
1982 A-707 50 watts
1982 A-900 70 watts
1982 A-909 70 watts
1982 A-930P 70 watts
1982 A-1000 100 watts
1982 A-1001 100 watts
1982 A-1010 100 watts
1982 A-1100 100 watts
1982 A-1100P 100 watts
1982 A-1100R 100 watts
1982 A-1110 100 watts
1982 A-1130 100 watts
1982 A-1130P 100 watts
1982 A-1200 125 watts
1982 A-1200P 125 watts
1982 A-1200R 125 watts
1982 A-1230 125 watts
1982 A-1230P 125 watts
1982 A-1500R 160 watts
"Direct Coupled"
1983 AU-M7 25 watts
1983 AU-M70 25 watts
1983 AU-M77 25 watts
"Direct Coupled"
1983 A-M800 25 watts
1983 A-M9 70 watts
"Direct Coupled - Super FeedForward"
This group received notable press attention and a Wikipedia mention
1983 AU-D101 30 watts (UK/EUR 220/240V)
1983 AU-D22 35 watts
1983 AU-D33 50 watts
"Direct Coupled - Super FeedForward"
1983 AU-D55X 70 watts
"Direct Coupled - Super Ground Free?"
1983 AU-D77X 110 watts
"Direct Coupled - Diamond Differential - Super FeedForward - Ground Free"
1983 AU-D11 120 watts
1983 *AU-D11ii 130 watts -The AU-D11 II is a special version of the AU-D707X- MORE Here
"Direct Coupled - Diamond Differential - Super FeedForward - Ground Free"
"Extra" = copper plated chassis and non-magnetic elements
1983 AU-D607G Extra 90 watts (JDM)
1983 AU-D707G Extra 110 watts (JDM)
1983 AU-D907G Extra 130 watts JDM)
"Direct Coupled - Diamond Differential - Ground Free - X Balanced"
1984 AU-D607X 90 watts (JDM)
1984 AU-D707X 130 watts (JDM)
1984 AU-D907X 160 watts (JDM)
"Direct Coupled - Ground Free - X Balanced"
1984 AU-G11X 25 watts
1984 AU-G33X 45 watts
1984 AU-G55X 65 watts
1984 AU-G77X 110 watts
1984 AU-G99X 160 watts
"Direct Coupled - Ground Free - X Balanced"
1984 AU-G30X 45 watts
1984 AU-G50X 45 watts
1984 AU-G90X 130 watts
"Direct Coupled - Twin Diamond X Balanced"
1984 AU-D607X Decade 90 watts (JDM)
1984 AU-D707X Decade 130 watts (JDM)
1984 AU-D907X Decade 160 watts (JDM)
"Direct Coupled - Twin Diamond X Balanced - Compact Disc direct input"
1984 AU-D707XCD Decade 130 watts (JDM)
"Based on the circuit technology and know-how up to that time...developed through uncompromising selection of parts, improvement and hearing test."
1985 AU-X111MOS Vintage 110 watts (JDM)
"Direct Coupled"
1985 A-500 30 watts
"Direct Coupled"
1985 A-710 55 watts
1985 A-730 55 watts
1985 A-770 55 watts
"Direct Coupled"
1985 A-M90 70 watts
1985 A-M900 70 watts
1985 A-M99 70 watts
"Direct Coupled - Alpha"
1986 AU-a307 65 watts (JDM)
1986 AU-a507 80 watts (JDM)
"Direct Coupled - Alpha X Balanced"
1986 AU-a607 90 watts (JDM)
1986 AU-a707 130 watts (JDM)
1986 AU-a907 180 watts (JDM)
"Direct Coupled - Alpha"
1987 AU-a307i 65 watts (JDM)
1987 AU-a507i 80 watts (JDM)
"Direct Coupled - Alpha - Custom Capacitors"
1987 AU-a607i 90 watts (JDM)
1987 AU-a707i 130 watts (JDM)
1987 AU-a907i 160 watts (JDM)
"Direct Coupled - Alpha X Balanced - Custom Capacitors - MOS FET - Compact Disc direct input"
1987 AU-a907i MOS Limited 80 watts (JDM)
"Direct Coupled - Alpha X Balanced - Ground Free"
1987 AU-X201 30 watts
1987 AU-X301 65 watts
1987 AU-X501 80 watts
1987 AU-X701 90 watts (int version of JDM AU-a607i)
1987 AU-X901 130 watts (int version of JDM AU-a707i)
"Direct Coupled - Alpha X Balanced - Ground Free - Diamond Differential"
1987 AU-X711 100 watts
"Based on the circuit technology and know-how up to that time...developed through uncompromising selection of parts, improvement and hearing test."
1988 AU-X1111MOS Vintage 110 watts (JDM)
"Direct Coupled - Alpha - Ground Free"
1988 AU-a307 65 watts (JDM)
1988 AU-a507 Extra ??? watts (JDM)
1988 AU-a607 Extra 90 watts (JDM)
1988 AU-a707 Extra 130 watts (JDM)
1988 AU-a907 Extra ??? watts (JDM)
1988 AU-a907 Extra ??? watts (JDM)
1989 AU-X111 30 watts
1989 AU-X911DG 100 watts
"L Extra" - first use of nonmagnetic transistors, all later versions had these
1989 AU-a607L Extra 90 watts (JDM)
1989 AU-a707L Extra 130 watts (JDM)
1989 AU-a901L Extra 160 watts (JDM)
1989 AU-a555VS 80 watts (JDM)
1989 AU-a777DG 90 watts (JDM)
1989 AU-a999DG 95 watts (JDM)
"DR and later" - upgraded circuitry and components
1991 AU-a607DR 90 watts (JDM)
1991 AU-a707DR 130 watts (JDM)
1990 AU-a907DR 160 watts (JDM
1991 AU-a 607 MOS Premium 45 watts (JDM)
1992 A-X750 40 watts
1992 AU-a507R 65 watts
"α -X balanced"
1992 AU-a607KX 90 watts (JDM)
1992 AU-a707KX 130 watts (JDM)
1992 AU-a907KX160 watts (JDM)
1992 AU-X701DR ??? watts
"Hyper α -X balanced"
1993 AU-a507XR Series 70 watts (JDM)
1993 AU-a607XR Series 90 watts (JDM)
1993 AU-a707XR Series 130 watts (JDM)
1993 AU-a907XR Series 160 watts (JDM)
1994 AU-a117K 30 watts (JDM)
1994 AU-a317K 55 watts (JDM)
1994 AU-a505XR 60 watts (JDM)
1994 AU-a907 Limited 80 watts (JDM)
1994 A-a7 50 watts (JDM)
1994 A-a9 50 watts (JDM)
1995 AU-607aMRX 90 watts (JDM)
"Hyper α -X balanced"
1995 AU-a607MR 90 watts (JDM)
1995 AU-a707MR 130 watts (JDM)
1995 AU-a907MR 160 watts (JDM)
1995 AU-X517R 65 watts
1995 AU-X619R 65 watts
1996 AU-07 Anniversary 90 watts (JDM)
1996 A-E350 25 watts
1996 A-E550 55 watts
1996 A-E750 90 watts
1996 A-E770 50 watts
1996 A-E770 75 watts
1997 A-a77 50 watts (JDM)
1997 A-a99 50 watts (JDM)
1997 AU-a205 30 watts (JDM)
1997 AU-a305R 55 watts (JDM)
1997 AU-a305RX 65 watts (JDM)
1997 AU-a505RX 80 watts (JDM)
1998 AU-a507NRA 60 watts (JDM)
1998 AU-a607NRA 80 watts (JDM)
1998 AU-a707NRA 130 watts (JDM)
1998 AU-a907NRA 160 watts (JDM)
1999 AU-405 60 watts (JDM)
1999 AU-a607NRAii 80 watts (JDM)
1999 AU-a607 MOS Limited 50 watts (JDM)
SEPARATES SOON
Sources for this period:
http://www.sansui.us/Amplifiers.htm
https://audio-heritage.jp/SANSUI/index.html
https://audio-database.com/SANSUI/index.html
https://www.hifiengine.com/manual_library/sansui.shtml
Release dates cross referenced to the ESAK Serial Number Report
How to Best the Sansui X Balanced Amps
Best breakdown on AK(probably) of this generation right Here thanks @fojica
What happened to the Diamond Differential circuit? Thanks @GrisPato
X Balanced
Thanks @Qsiris Here
The 'alpha' name was applied to x-balanced models from 1986 onward and reflects an evolution of the original x-balanced circuitry.
Thanks @pete_mac Here
L Extra - first use of nonmagnetic transistors, all later versions had these
DR and later - upgraded circuitry and components
XR and later - last circuitry upgrade (hyper speed forward)
Thanks @Qsiris Here
The AU-D11 II is a special version of the AU-D707X...
Thanks @JoseHH More here
I've been gleaning everything I can related to the development of this period. This thread Here with posts by @fojica and conversation with the some other pros and enthusiasts here offer very thorough technical detail.
The plan is to have a complete chronological list of all Sansui solid state integrated amplifiers (and separates) from the 1967 AU-777 20 watts to the 1999 AU-a607 MOS Limited 50 watts with classification by significant steps in topology.
Please comment or correct anything here!
V. 03/20/23 1978+
----- INTEGRATED AMPLIFIERS ----
"Direct Coupled - Diamond Differential"
1978 AU-X1 160 watts
"Direct Coupled - Diamond Differential - Super FeedForward"
1980 AU-D607F 75 watts (JDM)
1980 AU-D707F 95 watts (JDM)
1980 AU-D907F 130 watts (JDM)
"Direct Coupled"
1982 AU-D5 (B)(S) 65 watts
1982 AU-D7 (B)(S) 80 watts
"Direct Coupled - Diamond Differential - Super FeedForward"
1980 AU-D9 95 watts
1980 AU-D11 120 watts
"Direct Coupled"
1980 A-40 25 watts
1980 A-60 45 watts
1980 A-80 65 watts
"Direct Coupled - Diamond Differential - Super FeedForward"
"Extra" = copper plated chassis and non-magnetic elements
1981 AU-D607F Extra 80 watts (JDM)
1981 AU-D707F Extra 100 watts (JDM)
1981 AU-D907F Extra 130 watts (JDM) + MOS-FET
"Direct Coupled - Diamond Differential - Super FeedForward"
1981 AU-X11 160 watts
"Direct Coupled - Super FeedForward"
1981 AU-D55F 50 watt (JDM version of AU-D33)
"Direct Coupled"
1982 A-5 (B)(S) 25 watts
1982 A-7 (B)(S) 45 watts
1982 A-9 (B)(S) 65 watts
"Direct Coupled"
1982 A-500 (B)(S) 30 watts
1982 A-501 30 watts
1982 A-Classique501 30 watts
1982 A-505 30 watts
1982 A-510 (silver and black) 30 watts
1982 A-700 55 watts
1982 A-707 50 watts
1982 A-900 70 watts
1982 A-909 70 watts
1982 A-930P 70 watts
1982 A-1000 100 watts
1982 A-1001 100 watts
1982 A-1010 100 watts
1982 A-1100 100 watts
1982 A-1100P 100 watts
1982 A-1100R 100 watts
1982 A-1110 100 watts
1982 A-1130 100 watts
1982 A-1130P 100 watts
1982 A-1200 125 watts
1982 A-1200P 125 watts
1982 A-1200R 125 watts
1982 A-1230 125 watts
1982 A-1230P 125 watts
1982 A-1500R 160 watts
"Direct Coupled"
1983 AU-M7 25 watts
1983 AU-M70 25 watts
1983 AU-M77 25 watts
"Direct Coupled"
1983 A-M800 25 watts
1983 A-M9 70 watts
"Direct Coupled - Super FeedForward"
This group received notable press attention and a Wikipedia mention
1983 AU-D101 30 watts (UK/EUR 220/240V)
1983 AU-D22 35 watts
1983 AU-D33 50 watts
"Direct Coupled - Super FeedForward"
1983 AU-D55X 70 watts
"Direct Coupled - Super Ground Free?"
1983 AU-D77X 110 watts
"Direct Coupled - Diamond Differential - Super FeedForward - Ground Free"
1983 AU-D11 120 watts
1983 *AU-D11ii 130 watts -The AU-D11 II is a special version of the AU-D707X- MORE Here
"Direct Coupled - Diamond Differential - Super FeedForward - Ground Free"
"Extra" = copper plated chassis and non-magnetic elements
1983 AU-D607G Extra 90 watts (JDM)
1983 AU-D707G Extra 110 watts (JDM)
1983 AU-D907G Extra 130 watts JDM)
"Direct Coupled - Diamond Differential - Ground Free - X Balanced"
1984 AU-D607X 90 watts (JDM)
1984 AU-D707X 130 watts (JDM)
1984 AU-D907X 160 watts (JDM)
"Direct Coupled - Ground Free - X Balanced"
1984 AU-G11X 25 watts
1984 AU-G33X 45 watts
1984 AU-G55X 65 watts
1984 AU-G77X 110 watts
1984 AU-G99X 160 watts
"Direct Coupled - Ground Free - X Balanced"
1984 AU-G30X 45 watts
1984 AU-G50X 45 watts
1984 AU-G90X 130 watts
"Direct Coupled - Twin Diamond X Balanced"
1984 AU-D607X Decade 90 watts (JDM)
1984 AU-D707X Decade 130 watts (JDM)
1984 AU-D907X Decade 160 watts (JDM)
"Direct Coupled - Twin Diamond X Balanced - Compact Disc direct input"
1984 AU-D707XCD Decade 130 watts (JDM)
"Based on the circuit technology and know-how up to that time...developed through uncompromising selection of parts, improvement and hearing test."
1985 AU-X111MOS Vintage 110 watts (JDM)
"Direct Coupled"
1985 A-500 30 watts
"Direct Coupled"
1985 A-710 55 watts
1985 A-730 55 watts
1985 A-770 55 watts
"Direct Coupled"
1985 A-M90 70 watts
1985 A-M900 70 watts
1985 A-M99 70 watts
"Direct Coupled - Alpha"
1986 AU-a307 65 watts (JDM)
1986 AU-a507 80 watts (JDM)
"Direct Coupled - Alpha X Balanced"
1986 AU-a607 90 watts (JDM)
1986 AU-a707 130 watts (JDM)
1986 AU-a907 180 watts (JDM)
"Direct Coupled - Alpha"
1987 AU-a307i 65 watts (JDM)
1987 AU-a507i 80 watts (JDM)
"Direct Coupled - Alpha - Custom Capacitors"
1987 AU-a607i 90 watts (JDM)
1987 AU-a707i 130 watts (JDM)
1987 AU-a907i 160 watts (JDM)
"Direct Coupled - Alpha X Balanced - Custom Capacitors - MOS FET - Compact Disc direct input"
1987 AU-a907i MOS Limited 80 watts (JDM)
"Direct Coupled - Alpha X Balanced - Ground Free"
1987 AU-X201 30 watts
1987 AU-X301 65 watts
1987 AU-X501 80 watts
1987 AU-X701 90 watts (int version of JDM AU-a607i)
1987 AU-X901 130 watts (int version of JDM AU-a707i)
"Direct Coupled - Alpha X Balanced - Ground Free - Diamond Differential"
1987 AU-X711 100 watts
"Based on the circuit technology and know-how up to that time...developed through uncompromising selection of parts, improvement and hearing test."
1988 AU-X1111MOS Vintage 110 watts (JDM)
"Direct Coupled - Alpha - Ground Free"
1988 AU-a307 65 watts (JDM)
1988 AU-a507 Extra ??? watts (JDM)
1988 AU-a607 Extra 90 watts (JDM)
1988 AU-a707 Extra 130 watts (JDM)
1988 AU-a907 Extra ??? watts (JDM)
1988 AU-a907 Extra ??? watts (JDM)
1989 AU-X111 30 watts
1989 AU-X911DG 100 watts
"L Extra" - first use of nonmagnetic transistors, all later versions had these
1989 AU-a607L Extra 90 watts (JDM)
1989 AU-a707L Extra 130 watts (JDM)
1989 AU-a901L Extra 160 watts (JDM)
1989 AU-a555VS 80 watts (JDM)
1989 AU-a777DG 90 watts (JDM)
1989 AU-a999DG 95 watts (JDM)
"DR and later" - upgraded circuitry and components
1991 AU-a607DR 90 watts (JDM)
1991 AU-a707DR 130 watts (JDM)
1990 AU-a907DR 160 watts (JDM
1991 AU-a 607 MOS Premium 45 watts (JDM)
1992 A-X750 40 watts
1992 AU-a507R 65 watts
"α -X balanced"
1992 AU-a607KX 90 watts (JDM)
1992 AU-a707KX 130 watts (JDM)
1992 AU-a907KX160 watts (JDM)
1992 AU-X701DR ??? watts
"Hyper α -X balanced"
1993 AU-a507XR Series 70 watts (JDM)
1993 AU-a607XR Series 90 watts (JDM)
1993 AU-a707XR Series 130 watts (JDM)
1993 AU-a907XR Series 160 watts (JDM)
1994 AU-a117K 30 watts (JDM)
1994 AU-a317K 55 watts (JDM)
1994 AU-a505XR 60 watts (JDM)
1994 AU-a907 Limited 80 watts (JDM)
1994 A-a7 50 watts (JDM)
1994 A-a9 50 watts (JDM)
1995 AU-607aMRX 90 watts (JDM)
"Hyper α -X balanced"
1995 AU-a607MR 90 watts (JDM)
1995 AU-a707MR 130 watts (JDM)
1995 AU-a907MR 160 watts (JDM)
1995 AU-X517R 65 watts
1995 AU-X619R 65 watts
1996 AU-07 Anniversary 90 watts (JDM)
1996 A-E350 25 watts
1996 A-E550 55 watts
1996 A-E750 90 watts
1996 A-E770 50 watts
1996 A-E770 75 watts
1997 A-a77 50 watts (JDM)
1997 A-a99 50 watts (JDM)
1997 AU-a205 30 watts (JDM)
1997 AU-a305R 55 watts (JDM)
1997 AU-a305RX 65 watts (JDM)
1997 AU-a505RX 80 watts (JDM)
1998 AU-a507NRA 60 watts (JDM)
1998 AU-a607NRA 80 watts (JDM)
1998 AU-a707NRA 130 watts (JDM)
1998 AU-a907NRA 160 watts (JDM)
1999 AU-405 60 watts (JDM)
1999 AU-a607NRAii 80 watts (JDM)
1999 AU-a607 MOS Limited 50 watts (JDM)
SEPARATES SOON
Sources for this period:
http://www.sansui.us/Amplifiers.htm
https://audio-heritage.jp/SANSUI/index.html
https://audio-database.com/SANSUI/index.html
https://www.hifiengine.com/manual_library/sansui.shtml
Release dates cross referenced to the ESAK Serial Number Report
How to Best the Sansui X Balanced Amps
Best breakdown on AK(probably) of this generation right Here thanks @fojica
What happened to the Diamond Differential circuit? Thanks @GrisPato
X Balanced
Thanks @Qsiris Here
The 'alpha' name was applied to x-balanced models from 1986 onward and reflects an evolution of the original x-balanced circuitry.
Thanks @pete_mac Here
L Extra - first use of nonmagnetic transistors, all later versions had these
DR and later - upgraded circuitry and components
XR and later - last circuitry upgrade (hyper speed forward)
Thanks @Qsiris Here
The AU-D11 II is a special version of the AU-D707X...
Thanks @JoseHH More here
Last edited:
Al Casey
Active Member
There are the A-a77 and A-a99; they have tone controls instead of the presence control found on the A-a7 and A-a9 models.
Got it. Thanks! And noticed I missed the A-a7 on the first pass too. Made the additions.
Also, having trouble finding wattage for these A-a7/a9/a77/a99? Do you know? I can investigate more later, if not.
Love the clean looks of the A-a7/a9/a77/a99!
Last edited:
Al Casey
Active Member
Same wattage. They were released after the A-a7, A-a9.
Nice amps for a bedroom, office etc.