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Hi I have a Quad 33 Preamp running with a Quad 303 Poweramp. The right channel has stopped working but it doesn't appear to be a problem with the lead. Does anyone know anywhere in London and se England where I can get a repair for this equipment? Thanks

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I had the same problem. The tape monitor input still works though (disk, tape 1 and tape2 all have the one channel problem). See if you can live with this..

Posted on Mar 09, 2011

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Try here.

Posted on May 19, 2010

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petraman7
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SOURCE: Hi I have a Quad 33 Preamp running with a Quad 303

http://www.quad-hifi.co.uk/service.php

Posted on Apr 17, 2010

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1 Answer

Quad 33 chanel bad sound when playing music


As you know that the right is good you can compare that with the left. First look around for burnt resistors or damaged parts.

The next thing to do is with an insulated tool poke the two channels to see what buzz sound each channel makes. You should quickly find the distortion section with this method.

Mar 07, 2014 | Quad Audio Players & Recorders

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I connected a JVC component turntable to the CD input then tried the Aux input on a Yamaha RXV663 HD tuner and the audio volume in this 7.1 system was almost non existent. There was barely any base coming...


Yeah, phono a preamp.

"PHONO" is the only designated connection on an audio device that is literal and exclusive. Nothing but PHONO will work right on it and old-school turntables would require it to preamplify the tiny current produced by a Phono cartridge.

If your unit doesn't have a PHONO connection AND your TT doesn't have a self-contained preamp you will have to get a Phono Preamp to connect between the TT and any Line Level input, like Aux.

eBay always has some...
http://shop.ebay.com/?_from=R40&_trksid=p3984.m570.l1311&_nkw=phono+preamp&_sacat=See-All-Categories

Jul 25, 2011 | Audio Players & Recorders

1 Answer

Left hand channel low output. Need to turn balance control way to left to get correct sound stage. Is problem likely to be in preamp or poweramp sections.


Name the make and model number first, then we'll get the manual. Then (maybe) a solution.


Maybe run it by the manufacturer

Apr 04, 2011 | Audio Players & Recorders

1 Answer

I own a Fisher X-202-B tube amp which I have restored with new caps. It played very well for 2 weeks,then one input section suddenly went dead. It doesnt matter if I use tuner,AUX or phono,there is zero...


i) It is possible that one of the electrolytics has been put in with wrong polarity. Check in the faulty channel preamp. It may have caused the HT to collapse in that preamp section - look for burnt resistor.

ii) Also compare the corresponding voltage on the anodes of the preamp valves in the working & non-working channels. This will tell you which area is faulty.

Feb 15, 2011 | Audio Players & Recorders

1 Answer

One (right) preamp blow! I've located the problem to the right C160 module. When disconnected everything seems fine. Diodes and transistors are apparantly ok measured onboard as are all resistors and...


hi...
transistors are not ok on the C160 module.
replace all the power transistors and emitter resistors for that channel.
www.bdent.com and www.ceitron.com are good for transistors

Sep 30, 2010 | NAD C370 2-Channel Amplifier

1 Answer

My behringer europower EP2500 poweramp has a bad hiss on channel 2 What could this be?


There is a possible noise build up on your CH2 due to failure or weakness of the LCR network of the preamp circuit. It could also be a noise within any semiconducctor or the preamp IC. Unless you can do a signal test with the elimination of the input to the output amplifier, the fault will not be say to isolate. Hence if youarre familiar do the test by approching from the output amplifier's input, proceeding to the main input where the faulty section can be identified. Hope this helps. Good day

Jul 18, 2010 | Behringer EUROPOWER EP2500 Amplifier

1 Answer

Yamaha m70 amp and c70 pre-amp right speaker stopped working


First, lets's determine if it's the amp or the preamp...

Swap the Left and Right channel cables between preamp and the amp with each other.

Did it stay on the right? = amp problem.

Now on the left? Preamp or source.

Plug any Line Level device (CD?) directly into the amp inputs. Work now? Preamp problem.

ALL sources? Preamp - toggle all controls, especially a Tape Monitor to possibly wipe of any built-up oxides in them.

May 31, 2010 | Audio Players & Recorders

1 Answer

I have distortion coming out of my front right channel of my AVR


Yes, sounds like your DSP chip has an issue. Not an inexpensive repair if that's the culpret. Around 400-500 to replace the chip. It's an awesome receiver and worth 300-400 in repair, however, a 3800 or 1800 can be had for 600-800 depending where you look. If you need more help, post a comment and I can help you some more.

Aug 10, 2009 | Yamaha RX-V2600 Receiver

1 Answer

Denon 1802 - right speaker system connectors not working


Sounds like the second channel has blown , you have proven the speakers are not at fault and I am asuming that the speakesrs are on the same cables so you have proven them also .
Most units have an Intergrated dual chip that houses both channels .. that are then filtered / phased to give quad sound .
If you can check output from the Preamp stage of the unit if it is going in to the Ic on the rightside but not coming out .. eureka ..
however if it is and your still getting no sound check the out put capacitors they may have gone o/c sometimes happens , a quick inspection of the printed copper circuit would not go amiss either sometimes moving an object causes strains and stresses on the old dry circuit board and cracks appear . If you are not qualified to do this I suggest a skilled engineer should do this for you in the long run it may save you money as the unskilled can sometimes do more damage than good .............Regards Vortash

Mar 22, 2009 | Denon AVR-1802 Receiver

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