Non-conductive-removeable-glue ?

[Paul]

Suppose the thickness of the glue is one inch and it's under 400 volts
during 8 hours a day.

How long would it take before the glue becomes fully conductive ?

Bye,
Skybuck.

Skybuck, tnere is an easier answer.

If you remove the subwoofer speaker from the cabinet, then build
an identical (tuned port or whatever) wooden cabinet, and move
the subwoofer over to that, the remaining amplifier components
will no longer be in a noisy, vibration prone environment.
As a result, you will no longer need to pour glue all over
the amplifier components.

Paul