2. tech-talk
  3. 1076084312

Amp "pop" - need help

just purchased a McCormack DNA-1 Deluxe. While the sound quality is greatly improved - better stereo separation, deeper bass, less harsh highs, improved dynamics - I have noticed the amp gets quite hot. After just a few hours the heat sinks are hot enough to be quite uncomfortable to the touch. Worse, though, the amp makes a popping noise as it heats up. Sounds a bit like metal expansion. . .the wife says it sounds like the last kernel of corn popping in the microwave.
Not sure if this is an issue but it sure is a big change over the previous amp that would run all day without overheating.

Any ideas?
audio_newb
audio_newb OP
11 posts
 
Thank you all. I am reassured. now, back to my previously scheduled listening. . . . .
jmcgrogan2's avatar
jmcgrogan2
6,346 posts
 
Leave amp on at all times and this won't be a problem. I leave my Threshold on 24/7 (150 wpc of pure Class A). It sounds better and is easier on the internal components, no power rushes. I leave all SS equipment on at all times. YMMV.

Regards,
John
mrderrick
292 posts
 
I have a Classe CA400 that would make a loud metallic snap/pop/click. I removed the top plate and refastened it. The noise went away. I figured that maybe the cover was expanding. I was right.
kehut's avatar
kehut
668 posts
 
I absolutely agree with all above. Just metal expansion and contraction and not a problem per se. Leaving the amp on is a benefit sonically as well. As for the heat isuue...take heart,Krells heat sinks run about 145 F in class A and my Plinius SA 100 Mkll runs a blistering 160F !! in Class A.. Now thats uncomforatble!

Best
Ken
audio_newb OP
11 posts
 
Are we REALLY to leave the amp on 24/7?

Gosh, I should move back to the east coast and use the amp to heat the room. I can't imagine that kind of heat build-up is good for the components baking in the case.
More to discover