Question about NAD C350 2-Channel Amplifier

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NAD C340 only the cd input operates properly. choose any other input and you only get one chanel of it.

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Re: NAD C340

Have the same problem. Found some info here on the chip that's probably blown..

Posted on Dec 28, 2007

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Re: NAD C340

Hi There,

In a sound system there is an input selector switch which just connects the input socket you want to use to the "common" amplifier electronics inside...You say that the CD is fine so in this case it must be a faulty selector switch or broken copper tracks or wires inside the chassis electronics which connect those inputs.. through the selector switch to the amplifier circuitry.

The fault lies between the selector switch and the input sockets that dont work.....Not the CD one of course... thats fine..

Cheers From YUBEUT

Posted on Nov 16, 2007

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C340. Why do inputs switch to either tuner or tape2 monitor on their own, albeit intermittently?

Probable answer? Dirt..Sometimes you can get poor contacts working again by gently working the switches 50-60 times
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Cracking noise nad c340

Sometimes you can find the faulty part by touching the parts inside the amp. Only touch the plastic parts not any metal parts! As it is on one channel you have a good channel to compare the bad. Often small transitors can become noisy so start with them!

Nov 18, 2012 | NAD C340 Integrated Amplifier

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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???

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1 Answer

Unsure of connections from nad c340 to power amp, cant get both speakers working

It sounds like you're guessing.

Have you looked at the manual?

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Page 7.

Tell us about the source(s) that won

Mar 25, 2011 | NAD C340 Integrated Amplifier

1 Answer

What is the maximum speaker wattage for a NAD c340 integrated amplifier?

The specs say 2x50W into 8 ohms. I could not located the 4 ohm specs, but it is logical to assume that you can run 2x100W into 4 ohms.

The back panel seems to imply that 4 ohms is a limit for speakers.

So any speaker over 100W capability should be fine, either 4 ohms or 8 ohms.

Oct 30, 2009 | NAD C340 Integrated Amplifier

1 Answer

PreAmp to Amp problem

Sorted it. You have to put the plugs back in the PreampOUt/Main in or it cuts out the pre-amp.

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1 Answer

Need a transistor spare part for NAD C340

Odd a transistor would have such a #. No 2Fanything series. It is most likely a 2SA949.... a PNP audio driver transistor.
It can be replaced by a NTE-383 (ECG383) transistor, though it's best to order the original # from a Japanese semiconductor supplier like MCM in Ohio.
It's best brought to a good hi-fi or guitar amp repir shop for a proper go-thru & repair.

Mark S. CET Sr. Dover, NH

Nov 06, 2008 | NAD C340 Integrated Amplifier

3 Answers

NAD C340 has lost ability to switch between inputs

I have the same problem which started about a month ago and seems to be getting worse. I also noticed today, that 1 channel is significantly louder than the other - fault in the pre-amp stage, as feeding the power stage directly gives balanced, albeit extremely loud sound! Looking on eBay, I found someone else selling an amp with both problems. It would nice to think that NAD would acknowledge a design flaw, and fix for free, but my amp is 5 year old.

Jul 14, 2007 | NAD C340 Integrated Amplifier

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