Question about NAD C320 2-Channel Amplifier

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NAD C320 one channel very quiet with weak bass

Not so much a problem as a problem + solution :-)
One channel on my C320 had the above problem. I read online about capacitors drying out, so opened up the case & sure enough the top of a cap on the bad channel had it's top opened, so dryout seemed likely. Think it was C216 at 2200uF/6.3V. Can be replaced by removing the underside pane of the amp & desoldering the bad component - no need to remove the main board. Used larger voltage replacement, this isn't usually a problem. Now back in service & sounding fine.

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  • horacefitz Apr 07, 2008

    see above question contains the solution...

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6 Suggested Answers

SparkGap
  • 363 Answers

SOURCE: NAD 302 Amp

Try Earex wax softener, worked for me! Seriously though, are you sure it's the amp, could someone have cooked your speakers without you knowing? Have you checked the media source? Garbage in equals garbage out with any system. Your terminology leads me to think you are an audiophile, so have you checked the stylus? Have you put in some new furniture or rearranged the room. This can make a big difference to the way a system sounds. Check all the usual things like your signal connections. If you have a PC to hand in your listening room, use it as a sound analyser, plug a microphone in and connect the line out into your amp you should be able then to measure the responses of your setup with white noise, swept tones and impulses for room dynamics. I seem to remember there are freeware utilities for this kind of thing. Good luck

Posted on Sep 22, 2007

  • 4234 Answers

SOURCE: Nad C320 right channel stops working then comes back again

This sounds like the "pre-amp" section is cutting out or there is some interruption in the signal path. A few things to try:

1) With the unit off, try "working" the volume,balance and tone controls. This means, turn them up and down a number of times to clear any debris that may be in the controls themselves.

2) Work the input selector switch the same way if it is a rotary switch.

3) Try turning on/off the tape monitor switch a few times.

4) Keep track of whether this problem is sensitive to heat. Does teh channel shut down more quickly once the unit has been on for a while?

Lastly, if you can solder, look for any solder joint that appears grainy or has rings and resolder it.

Update this with your results and we'll continue on...

Thanks,
Dan

Posted on Jan 16, 2009

  • 4 Answers

SOURCE: NAD C272 Amplifier: Intermittent left channel

My solution was actually indeed the output protection relay. What I did was to open up the relay and use contact cleaner and a very fine abrasive to clean the contact surfaces of the relay. After that, the problem was gone!

The way to diagnose this for me was to run the amplifier open until the problem recurred and to simply tap the relay's box. The sound came on immediately, and I was convinced.

Posted on Feb 05, 2009

Grubhead
  • 4590 Answers

SOURCE: NAD C370 Right channel distortion

Sounds like you have lost the power amp transistor(s) or IC for this channel.

Posted on Feb 16, 2009

petraman7
  • 1175 Answers

SOURCE: NAD C270 amp won't switch from red power/protection to green.

The AH may denote "slo-blo" style as opposed to Fast-acting
A fast-acting fuse will look like a single strand of wire ( maybe wiggly looking) ..A Slo-blo will have an element in it and a spring

Posted on Apr 11, 2009

dunnbiker
  • 8546 Answers

SOURCE: NAD C320 system sounds like a cheap, tinny tranny

Let's distill this down to its simplist configuration. FM source, stereo.

BTW, a search for NAD 440 only brings up a C440 >>>Tuner<<, no receivers. Are you sure about that model number? The only receiver model numbers with x40 on the NAD website are the C340 and C740, neither of which has a link to a manual (go figure). I have the C740 manual, so I'll use it for a loose reference.

If it still does what you're describing in a basic configuration and the volume control seems to affect it like you belatedly mentioned, I'd suspect a noisy volume control or some other control in the receiver (like a rarely used Tape Monitor switch) that is always there in the circuit but may have oxidized contacts and responds sometimes to burn-through.

Set the volume at a medium setting and repeatedly operate every switch, knob and button (one at a time) to gauge its effects on the sound. You may find one is the culprit. Then it's a matter of accessing it for a shot of contact cleaner.

If you have jumpers between Pre Out and Main In, it might be a good idea to reseat them, too.

Posted on Mar 24, 2010

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1 Answer

NAD C320. Only one channel sounds. Problem with the volume control?


Did you try to switch the loudspeakers? Before changing anything always lover the volume and switch off the amplifier.
Assuming you tested already different inputs, you can be sure no cable from signal source is out or defect. (or did you nit check that first?).
When the amp is switched off, disconnect the speakers and switch left to right and right to the left output.. If the other speaker is quiet now, you are sure it is in the amp. Still his can be anything.
You can check the connections between the pre and main amplifier on the back side. When you have an extra set of interlink cables, perhaps you can cross the in and output there too. Take care every time you change something, lower the voltage and switch off the amplifier. Sudden clicks when switching on or changing anything can damage the amp and or the speakers.

Perhaps when you checked this you can locate where the problem is? Speaker, speaker cable, power amp, pre amp, (only a part of the pre amp.

Nov 12, 2013 | NAD C320 2-Channel Amplifier

1 Answer

How to connect an MP3 Player to NAD C320?


You will need a cable with headphone jack (for mp3) and RCA left/right to connect to your NAD 320. You can connect to CD or AUX in the back and then you will need to change the input with remote or with on board buttons to CD or AUX depending where you plugged it.

Jun 20, 2012 | NAD C320 2-Channel Amplifier

1 Answer

My NAD C320 outputs a very low sound volume


Hi there I have a C340 that has similar problem, you must have bought this from ebay, lol.

Nad made a mistake on the C range, the pre - power link can be shorted out. if the pre is shorted out it takes out the pre amplifier stage, I have managed to get the right channel working, I will keep you informed what is the cause of the left channel. I have replaced the pre-amp IC and a couple of Jfets and transistors. Once I have repaired the Amp I could repaire yours if you like???

Apr 14, 2012 | NAD C320 2-Channel Amplifier

1 Answer

Hi please help i cant find the specs for the C320


Not much - I saw one quote at 40, one at 50 watts rms. Strange that the manual doesn't include specs.

http://www.amazon.co.uk/Nad-C320-BEE-titane-Amplifier/dp/B0001HYIMS

May 11, 2010 | NAD C320 2-Channel Amplifier

2 Answers

NAD C320 Amp Problem


It could be a pre amp or amplifier problem and would require either replacement or a service technician to look at it.

Jun 18, 2009 | NAD C320 2-Channel Amplifier

1 Answer

Lost the instruction in the box. Need a copy of the installion instruction for a c320 mio


You can get a free download for your manual here:
http://nadelectronics.com/product-manuals

OR
http://safemanuals.com/user-guide-instructions-owner-manual/NAD/C320-_M

May 13, 2009 | NAD C320 2-Channel Amplifier

1 Answer

No volume control


lower the volume of the cd player

May 08, 2009 | NAD C320 2-Channel Amplifier

1 Answer

Nad 310 amplifier VERY QUIET


take audio out from tv and insert it in aux in in your amp.

Jul 15, 2008 | NAD C320 2-Channel Amplifier

1 Answer

Won't stay on even in standby


The voltages are wrong. You should see (0.0, +/-0.6, and B+/B-) on the 3 pins. The driver section has a problem. Check the driver stage for shorted transistors or open resistors.
Dan

Mar 19, 2008 | NAD C320 2-Channel Amplifier

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