Question about NAD C370 2-Channel Amplifier

2 Answers

Nad s200 At low volumes, my right channel goes out on my nad s200 amplifier. When I turn up the volume, with my balance turned all the way to the right, it will then kick in after some static. I wondered if it was my preamp, but I'm convinced it is a problem with the s200 amplifier.

Posted by on

  • 1 more comment 
  • xxbadboyxx Feb 07, 2008

    Thanks for your prompt reply. After thinking about what you said, I checked the connections from the right speaker to the amp, and after replacing the wire with a new insulated wire, it now works perfectly. There must of been a short somewhere in the speaker wire which caused the problem. Funny, this is my third NAD amplifier that I've bought in the past month, all with the same problem, and turns out it was just the speaker wire.

  • fuelledbynin Oct 31, 2008

    Help! After years of trouble-free operation, both the speakers on the left channel of my beloved NAD C370 cut out simultaneously a few seconds after switching on to play music. Does this sound like the relay problem mentioned in this thread? How do I find the relay? I have no idea what a relay looks like.....

  • Anonymous Mar 28, 2014

    I use the preamp section to drive a c270 nad. The preamp is getting very warm after a few hours even though volume is very low. Thanks

×

2 Answers

  • Level 3:

    An expert who has achieved level 3 by getting 1000 points

    Superstar:

    An expert that got 20 achievements.

    All-Star:

    An expert that got 10 achievements.

    MVP:

    An expert that got 5 achievements.

  • Master
  • 1,512 Answers

It is most probably a dirty speaker protection relay. gently tap the relay(the one that engages shortly after turning the amp on) when the fault is occurring and see audio returns. This should ascertain the problem. Replace it if it is a sealed type, or if it has a "lid" you can get off, burnish the contacts with a white business card, and give it a spray with contact cleaner/lubricant. Good luck and a "fixYa" rating would be great for my profile :)

Posted on Feb 06, 2008

  • Graeme Ross
    Graeme Ross Feb 07, 2008

    That's great you got it fixed. It would not have been a short, but more so an intermittent open circuit in the speaker wiring. The giveaway for that is that the problem resolves when you turn the vol up. The speaker protection relay is in the speaker output path just as the wiring is. I have seen the relay cause these symptoms many times

×

The relays are the culprit(s). I've owned several of these NAD amps. a 2200PE power amp, a 7400 receiver, a 5150 integrated amp, and a 2600 monitor series power amp. They all, with the exception of the 5150 which doesn't seem to have relays, have had the speaker /ouput section protect relays go bad. My 7400 is due again too. I used to sell this brand in college, and we'd see many of them come back after about 5-10 years with this problem. Very common.

Posted on Aug 17, 2008

Add Your Answer

Uploading: 0%

my-video-file.mp4

Complete. Click "Add" to insert your video. Add

×

Loading...
Loading...

Related Questions:

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

2 Answers

Wotcha, i've just taken amp out of storage, has'nt been used for a while cant get volume to work properly the sound goes from speaker to speaker and up and down in volume whilst crackeling a lot as...


One way of proving it ISN'T the amp circuitry is to remove the pre-main jumpers and jack in a source that has its own volume control (or try a CD that starts really low) because this bypasses ALL the amps controls. If it sounds ok (albeit LOUD) I'd suspect oxidized contacts on the controls. Turn it off and vigorously operate all controls a zillion times to wear through it. In mosty cases it's the unused controls that fail because they never get wiped. Maybe a shot of contact cleaner on those you can access.

http://www.overload.it/supporto/643/manuali/NAD-C350.pdf

Oct 15, 2011 | NAD C350 2-Channel Amplifier

1 Answer

Losing one channel, comes back if you move the volume switch around then goes again ?


Hi,

That must be a dirty volume control (potmeter).
Or there's a lose contact on the PCB which is soldered to your volume control (potmeter).

regards,
Gerard

Mar 22, 2010 | NAD C370 2-Channel Amplifier

1 Answer

Losing the right channel


usually this would indicate a dry joint inside or some other temp related intermittent fault, component problem. Take it to a tech and tell them what happens

Sep 17, 2009 | NAD C370 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

Sound through one channel


Only the right channel had a sound,the left channel is mute, whatever adjustment you did and whatever balancing you done nothigs happen,even you interchange the speakers. The problem is in the power amp. The STK IC there is busted already, it's better to change it with a new one so the performance become normal again.

Jun 14, 2008 | NAD C372 Amplifier

1 Answer

Output volume has dropped in right channel


dear sir,pls check the HT voltage fuse, LTsupplay also and out put stage,and volume controle,

Jan 17, 2007 | NAD C350 2-Channel Amplifier

Not finding what you are looking for?
NAD C370 2-Channel Amplifier Logo

Related Topics:

995 people viewed this question

Ask a Question

Usually answered in minutes!

Top NAD Amplifiers & Preamps Experts

 Grubhead
Grubhead

Level 3 Expert

4572 Answers

The Knight
The Knight

Level 3 Expert

68157 Answers

Larry Stiles
Larry Stiles

Level 2 Expert

286 Answers

Are you a NAD Amplifier and Preamp Expert? Answer questions, earn points and help others

Answer questions

Manuals & User Guides

Loading...