Amp on top of subwoofer?

[KEW]

I know this probably isn't ideal, but I am looking at using the crossover of my sub and using the line level output to feed amp to the mains. Because of where the pre, amp, sub, and speakers are located, it would be nice to place the amp out of sight (under the table behind the sofa and the speakers are on the table behind the sofa) on top of the sub.

Any ideas on a good way to isolate the amp from vibrations? Or is it just a bad idea anyway you look at it?

Thanks,
Kurt

 

[its phillip]

I would imagine that as long as the subwoofer doesn't shift around, it wouldn't be a problem...but I have zero experience with a situation like that so my comment is just a guess.

 

[Alex2507]

For some reason I think a closed cell neoprene foam is the ticket. That source may not be the best because of some vague memory I have of reading somewhere that they fudge their NRC's on other products.

Plate amps don't get adversely affected by being strapped right to sub enclosures so my thought is that anything you do to decouple the two is already above and beyond. I like to use this type of rubber vibration isolator:

... but there are all kinds other ones I think are pretty cool. They just don't show up on jobs too often and I've never been able to get my paws on any.

 

[JAC]

All good ideas. Do make sure "all" compressions connections are as snug as possible.

 

[GranteedEV]

At least it's not sub on top of amp =P

 

[KEW]

My concern is that vibration might cause metal fatigue of some of the soldier joints if the amp was subject to continuous vibration.
While I think this is a legitimate concern, the use of an elastic pad should do the trick. A sub could shake a heavy amp, but I believe elastic coupling would allow the inertia of the amp to keep it still.