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Default NAD amp distorting heavily after running a bass guitar through it.

My NAD 214 stereo amp is dead or dying. Any signal I run through it is
extremely distorted and I have to turn up the volume to even hear that.


Beginning a few months back it would sound fine and then all of a
sudden die and the sound would become horrible distorted. The time it
takes the amp to go from working fine to distortion box continually
shortens from 20 to 10 to 5 to 2 to 1 minutes. Now it doesn't work
for anytime at all.

I haven't been playing nice with it recently. I have run a microphone
and bass guitar through it. However, the amp had experienced the
problem I described above before this.

So my question is this: Is there any fundamental reason why running a
bass guitar or mic through this amp would hurt it? Also, does anyone
have any idea what might be wrong with my amp.

Thank you!
-Jon

Ps here is my setup in case it's helpful.
NAD 214 Stereo Amp
NAD 512 CD player
Adcom preamp
KEF Q55 speakers
Monster XP cables

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Arny Krueger
 
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ups.com

I haven't been playing nice with it recently. I have run a microphone
and bass guitar through it. However, the amp had experienced the
problem I described above before this.


It's broken!

So my question is this: Is there any fundamental reason why running a
bass guitar or mic through this amp would hurt it?


No, no matter what someone may have told you or your guilt-wracked mind is
telling you.

One of the *loverly* things about electronic gear is that it can break for
no fault of your own. It can even break while it is not being used.

Basically, all the angst in the world isn't going to bring it back. You need
to fix it or throw it away or sell it as broken, or fix it yourself. Given
the questions you are asking, you lack the skills to effectively fix it. So
either find a qualified repair person or dispose of it some other way.

Also, does anyone have any idea what might be wrong with my amp.


Whatever it is, it is affecting both channels, per what you are saying.
Since fuses aren't blowing, the problem might be in the low-level input
circuitry rather than the outputs.

I see that a NAD 216 is going (or to be exact not going - zero bids) for
about $500 for eBay, so there is a possibility that your NAD 214 might be
worth a fairly expensive repair.




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Sander deWaal
 
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"Arny Krueger" said:

Whatever it is, it is affecting both channels, per what you are saying.
Since fuses aren't blowing, the problem might be in the low-level input
circuitry rather than the outputs.


Haven't thought about that. Indeed would that probably rule out my
idea of a bias failure.
A power supply problem perhaps? I don't have a schematic of this amp
available right now.......

I see that a NAD 216 is going (or to be exact not going - zero bids) for
about $500 for eBay, so there is a possibility that your NAD 214 might be
worth a fairly expensive repair.


Agreed.

--
Sander de Waal
" SOA of a KT88? Sufficient. "
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