Sansui Integrated - which to buy?

taff63

New Member
I’m looking at purchasing a Sansui integrated amp to replace an Exposure 17/18 and am drawn towards an AU X901, AU alpha 707DR or AU alpha 907DR. Can you tell me if there is much difference between the 3 amps in terms of sound quality?
 
OK is there a big difference between the 907 and 707? I 'd read on another forum somewhere that it was just the 907 had more power rather than a better circuit?
 
Same topology , 907 as the totl , is little bit more refined. There shouldn't be any sound difference.
 
OK is there a big difference between the 907 and 707? I 'd read on another forum somewhere that it was just the 907 had more power rather than a better circuit?

907 had more everything (power, top elements, sound) than 707 but schematic is the same.
 
I can vouch for having au-707dr. Excellent fast, detailed and neutral sounding. Sounds best using power amp direct mode. 130 watts per channel as well so no slouch.
 
Thanks for the replies. Any idea how a 707dr would compare against the exposure 17/18 I've got? I'd expect the 707dr to be more refined. The 707 I'm thinking of getting is fully serviced and in rude health :)
 
Thanks for the replies. Any idea how a 707dr would compare against the exposure 17/18 I've got? I'd expect the 707dr to be more refined. The 707 I'm thinking of getting is fully serviced and in rude health :)

Dont do recaping. Only adjustment from service manual.
 
Never owned any exposure gear. You won't be disappointed with the 707dr though. Ive just bought a b-2301 and the only real difference bewteen totl power amp and 707dr is more power and bass with b-2301. The 707dr edges slightly with the amount of detail that is revealed in tracks.
 
The nice thing about the AU-X901 is that it's an international amp, USA voltage, easier to get in USA, between $450 to $600 for a minty one, and it does sounds really good.

The X701 sells for a couple hundred cheaper and, from what I've been told by a fellow who had both, sounds identical. Only real difference: 100W vrs the X901's 130W. 'Source Direct' mode sounds wonderful. Loudness too. and MM/MC!

The X701/X901 are 'earlier' export alphas. 1987. They are internationally desired, especially in Germany. And the prices are much higher in Europe too.

It's also much easier to find a X701 than a X901. It's 'kind of like'... the folks who have the X901 aren't selling them. It's a really nice amp.

Happy Hunting. Wait for a 'minty' one, which ever one you get. Good Luck!
 
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I luv my 701. They're 120 watts RMS, compared to the 901 at 140 RMS, IIRC.

The 901 has several cool features, like XLR inputs, that the the 701 lacks.

The 911 has an obsolete DAC built in. It also has trouble with source selection, a non-replaceable motor or cable.

The JDM alpha-X models appear to be superior to the export alphas, but the price is higher.

701 specs; http://www.sansui.us/AU-X701.htm

err...it does say 100 watts RMS in other locations.
 
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I'll persuade you to buy the au-707dr, check out the internals (its a bit dusty though!) Amp shouldn't need recap just a service.

http://i1357.photobucket.com/albums/q743/sansui88/au707%20056_zps6gv9jvbo.jpg[/IMG


[IMG]http://i1357.photobucket.com/albums/q743/sansui88/au707%20057_zpsa3oi088y.jpg

au707%20058_zpsnbt9klma.jpg


au707%20059_zps1zjq3xfo.jpg


au707%20060_zpsiqjuysz3.jpg
 
Exact same heat sinks as AU-X911DG, no toroid power transformer as 911 though.
Smaller filter caps , 6800μf/80v compared to 10000μf/71v the 911 has.
I believe it's even the same chassis.
Same topology of course a-x balanced.
From the first a-x balanced to the last hyper a-x balanced , amps , I believe they are all the same.
 
Sansui Integrateds

You decide. Here are the specifications and original MSRP in Yen from Audio Heritage:

X901 (According to Best of Sansui this corresponded to the Alpha 707i
http://www.sansui.us/Issues_IntvsDomestic.htm)
http://audio-heritage.jp/SANSUI/amp/au-alpha707i.html
(1987 129,000 Y)

Alpha 707 DR
http://audio-heritage.jp/SANSUI/amp/au-alpha707dr.html
(1991 150,000 Y)

Alpha 907 DR
http://audio-heritage.jp/SANSUI/amp/au-alpha907dr.html
(1991 250,000 Y)

Of course, unless you get an X901 (US Voltage), you will probably need a step down transformer if you are in the US.

For some reason, I can never get these links to come out in English. You can try
https://translate.google.com/
for a translation. Just copy and paste in the address.

If you want to get really technical, here are historic exchange rates:
https://research.stlouisfed.org/fred2/data/EXJPUS.txt

Having posted all this, let me frankly say that I don't think that I could tell the difference between them in a blinded listening test.

Marc
 
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