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quad

  1. P

    Marantz 4270 Frankenstein!

    Hey everyone! Hope you are doing great, got a set of 4270 amp modules with original pair of 50V /15000uF caps (marking great). As this is all I've got I would like to know if someone could give me a hand figuring out what should be done to get it working on 2x70W (don't want to use it as...
  2. KilgoreBass

    QUAD II Amp + QUAD QC II Preamp - "Unique" condition

    Looking for opinions on fair market value of a QUAD QC-II preamplifier and QUAD II monoblock amplifier in “unique” condition and obvious need of restoration. These are circa 1956 based on a QUAD Product Year/Serial Number Record form, posted at the Lenco turntable forum. The units were housed...
  3. bencce

    Marantz 4270 - Digital source to quad sound

    Hi All, this is my firs post :) Recently we moved into a bigger flat and was able to change my audio system for a better one. I bought a 4270 with Pinoeer HPM-900 in the front and Grundig Hifi Box 500 in the rear. I've never dealt with the quadraphonic sound but started to read about it now...
  4. Mattwizz3

    Audio Haul - Got my dream amp! (kinda)

    Hi Guys! So I have probably not been a particularly active member of this site for quite a while. Although I still love vintage equipment like I did when I first joined this site as a teenager, now that im in my 30's I haven't been spending the time indulging myself with audio and related old...
    • Mattwizz3
    • Thread
    • akai as-970 gx-280d-ss linear design quad
    • Replies: 16
    • Forum: Solid State
  5. goldswimmerb

    Marantz 4300 No sound Front Left

    Hey guys, so this is the same amplifer but a new issue arose... I got both of the back channels working after giving PE01 a full rebuild, however now my front left preamp channel isn't working (yes I tested crossing wires). I know the amplifer channel is good. My voltages on that channel in...
  6. Briant8

    Sansui QRX-7500 channel weirdness.

    Hi All, A buddy asked me to look at his QRX-7500, and this is the channel weirdness going on. When I try 2-channel stereo (front speakers) the left side is strong but the right channel is out. But when I try the quad settings, the rear right side is good but the left side is out. All 4 power...
  7. foo.kamikaze

    Pioneer QX-949 4-Channel Level Indicator Question

    Hi. HISTORY: I sold my Pioneer SX-1010, and was looking for a less expensive, but comparable sounding vintage stereo receiver with real wood veneer. I believe I found that in the Pioneer QX-949. In fact, surprisingly, the QX-949 sounds more like my Pioneer SX-1250. I purchased the quadraphonic...
  8. Stockman

    Listening to a vintage Quad Receiver in an HDMI world

    I have a vintage Sansui QRX 7001 quad receiver and also Denon and Marantz AV receivers (AVR). Of them all, I prefer the sound (and look) of the QRX with the speakers in my listening area. The challenge is listening to an HDMI-only source (DVD, NVIDIA Shield, etc.) and/or a 5.1 analog source...
  9. corpblues

    Realistic Q-800 Four and Two Channel 8-Track Tape Deck

    Couldn't resist it. Clean it up, plugged it in and it works like a charm. Didn't even need a new belt. Can't find anything about this deck anywhere. Anyone know anything about it?
    • corpblues
    • Thread
    • 8-track quad
    • Replies: 2
    • Forum: Tape
  10. NedvonBundle

    Help me choose? Marantz 2215b, 2238, 4100 - all excellent cond.

    Hey there, tune-hounds! I have an opportunity to purchase one (or all!) of these bad boys: Marantz 2215b - $200 Marantz 2238 - $300 Marantz 4100 quad - $225 All of them work great, are cleaned and lubed by a pro with new lights. I already own a Marantz 2230 (which I love), but am wondering if...
  11. jd3rdcoast

    QX8000A FM Tuner Right Side weak and noisy. Help?

    I could use some help troubleshooting this FM Tuner problem on this nice Quad unit. Previously repaired the Main Amp boards. Cleaned all controls with CRC contact cleanser and CRC2-26 lube. AUX inputs all working fine on all 4 channels. But in FM mode the right channel is much lower than right...
  12. D

    Akai AS980 Quad Akai

    I took in for trade an Akai AS-980 Quadraphonic Stereo and know absolutely nothing about quad receivers. I traded him a decent Pioneer SX580 which was in excellent shape but I didn't have much in it. The Pioneer had been totally rebuilt and I picked it up at the previous owners estate sale...
  13. AnalogueDude

    Quad 405 into switched plug on Apt Holman OK?

    I’ve searched this and other forums, there seems to be mixed opinions on this. However, I believe the Quad 405 was always meant to be plugged into a switched outlet on a pre-amp (it has no power switch), and my Apt Holman is rated to a maximum of a Kilowatt soooo... shouldn’t be a danger in...
    • AnalogueDude
    • Thread
    • amp apt holman preamp quad quad 405 switched power
    • Replies: 3
    • Forum: Solid State
  14. Homer4beer

    Technics CD-4 (Quad 4) SS-2900D find - face restore?

    Hi guys, I came across this in my local classifieds and couldn't resist picking it up for $50 Aus. It's a Technics CD-4 system dating from 1972 purchased from the original owner. Apparently these are very rare? The speakers and timber work of the cabinets (all bar the missing strip on the amp...
    • Homer4beer
    • Thread
    • cd-4 quad restoration technics turntable
    • Replies: 6
    • Forum: Turntables
  15. L

    Quad 33 amp options

    Hi, A totally noob question here - in a fit of pique I have just bought a Quad 33, I am not however in possesion of a Quad 303. Is this the only option I have or can the 33 output to any other amplifier until such time as I can afford a 303?
  16. Richs_Trains

    Marantz 4220 questions on Ambience/SQ

    Hey all, I know I said I would be here less since my wife passed on April 11th, but I had a unit that was slow in getting here (ordered it before she passed and it came today) and I was going to try to get it functional before I hang up my soldering iron. I have a 4220 quad receiver that, after...
  17. T

    Quad ESL 63 newbie- question on sound and function!

    I am new to the world Quads and ESL so bear with me… I recently came into a pair of ESL 63’s. Based on the serial numbers they are approx. 1989 vintage. I am not sure if they are working correctly. They both put out sound. There is no crackling or popping or any other strange noises at any...
  18. billyz

    Sansui QRX 3500

    Ive been messing with a Sansui qrx 3500 for a while . I picked it up for $50 along with a sansui sr2050 $50 also. First thing I did was deoxit and faderlube as many of the switches and pots as I could. Measured the DC offset and adjusted them to 5mv or less each. Not exactly knowing what the...
    • billyz
    • Thread
    • qrx3500 quad sansui fm stereo sansui qrx 3500 sansui relay sp-200 sp-2500 sp200 sp2500
    • Replies: 0
    • Forum: Exclusively Sansui
  19. Richs_Trains

    Marantz 4270 newest victim

    Hey all, In my crazy effort to aqquire every Marantz quad, I picked up a 4270 with a wood case. The 4270 arrived in one piece, the wood case, not so much. Anyway, thank goodness this one worked when I got it, just needed the usual de-oxit treatments and general cleaning. I have re-capped the...
  20. vaathi

    How much for Quad 33/303 combo

    Hello fellow audio lovers... How much a combo Quad 33/303 is worth. 33 needs some work but supposedly has new facelift.. I am quoted 400 for both. You help appreciated.
  21. redpackman

    Marantz 4430 Quad - noise/distortion in left channel after playing so well earlier

    OK. I've got a Marantz 4430 Quad. Played it today and it sounded great, four speakers - two front, two rear, all 8 ohm, all on the "main" bank, none "remote." Strong and clear, but as the day wore on I noticed distortion/weakness in the left channel. I've cleaned all the controls and will...
    • redpackman
    • Thread
    • marantz noise trouble quad
    • Replies: 10
    • Forum: DIY
  22. Richs_Trains

    Marantz 4230 Oscillation

    Hey guys, Latest project is a 4230 I actually bought for the decoder and the wood case, so the receiver cost me about $100.00. I was billed as LED upgrade, De-Oxit and functional. What I get is functional until you start to turn it up, then the power oscillates (sound up and down, lights up...
  23. Richs_Trains

    Marantz SQA-1

    Hello, Just wondering if anyone has repaired an SQA-1 adaptor? I have one with no right front channel and just want to know if this is a fixable item, and if fixable, is it worth it or just find another?
  24. Richs_Trains

    SQA Quad Decoder Questions

    Hello, I am trying to get a definitive answer on whether an SQA module works properly with a stereo input or if it is ONLY meant for SQ encoded programs. When I play stereo signal (cassette-FM) into my SQA, it sounds terrible, but I was told that the decoder should make stereo into quasi-quad.
  25. Richs_Trains

    Marantz CD4 Test Record

    Well, changed the cables on the turntable, got the proper stylus and cartridge, played a CD4 album, had 4 channels, now I guess I need a Marantz cd4 test record to adjust the CD-400B. Anyone have one they can loan out for a week or so? Thanks Rich
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