Originally Posted by bossobass
A gate is just a fancy (or not so fancy) mute circuit and it's simple enough to work into an amplifier, once the source is identified. Hiss might be as simple as the outlet the amp is plugged into. Without data other than "hiss is loud", tossing the amp for a "better' one would not be my course of action... especially not for a used big iron amp.
So how you suggest somebody "work into" an amplifier with a external noise gate? At least "simply"? Noise is not usually a single source-but rather a combination of places that all add together.
That is NOT AT ALL for somebody who does not have a good electronics knowledge and skill and wants to void the warranty.
Maybe it is just me-but I have never heard a power outlet that caused any "hiss".
Other things to consider-is the maximum output capabilities. Given 2 amps that have the same amount of gain and signal to noise ratio-the larger power amp will produce a more audible hiss.
It will also get louder.
So for the same noise specs-going to an amp that has lower power is a way to reduce the actual noise heard.