2. amps-preamps
  3. 1345702743

NAD 2600 and thumping noise

Okay, I just got a nice deal on an NAD 2600. However, when I turn it on and off there is a fairly loud THUMP. Even if the volume is turned down and the inputs are removed, it is still there. I know this isn't much to go on, but any ideas? Is this a matter of cleaning this baby up? Or have I bought a dying beast? Or something in between?

Many thanks! Aaron
aewhistory
8 responses Add your response
aewhistory OP
70 posts
 
Actually, does anyone ever mod NADs the way Adcoms and other get the mod treatment?
aewhistory OP
70 posts
 
Hi bojack, thanks for the reply and sorry for my slow response. I hate to ask, but is this an expensive fix? Also, is it something I could put off? Finally, if I am going to do that, would it be worth having other work done to the amp?

Oh, a stupid question: what exactly are the relays? (hides head in shame)
bojack
650 posts
 
Not normal for this amp...the relays are shot and need to be replaced.
jmcgrogan2's avatar
jmcgrogan2
6,346 posts
 
Check with NAD, on an amp that old it may be that some caps have gone bad and need replacing.
ths364
181 posts
 
If you can turn the speakers off before powering up or down, do so.
If the amp has a headphone out that shuts the speakers off- you can insert cheap headphones or a dummy plug (just buy a 1/4 in stereo phone plug from Radio Shack). I had the same problem with aN NAD 71xx series receiver, and thats what I used to do.
marakanetz's avatar
marakanetz
5,473 posts
 
...and it's good for speakers too:-)
slikric3000
638 posts
 
That's normal with budget gear, no soft start of stop.
rar1's avatar
rar1
1,769 posts
 
I had a similar experience when powering down my Adcom 545. I was told back then by Adcom that it was nothing to worry about, as it was the amplifier doing some type of discharge. Sorry, I can not be more specific, but that was 20+ years ago and the Adcom is gone about the last 10 of those years.

Rich
Log in to respond
More to discover
80x80
Bryston BP17 Cubed
80x80
Decware ZMA
80x80
Benz Micro Lukaschek PP1 Phonostage