Originally Posted by nwf477
If I were to switch my 120vac 20a circuit over to a 220vac 20a would it be an advantage?
You would because the real Gruppen is rated for 120V 30a and 240V 15a. The clone is probably similar.
By doubling the voltage you essentially halve the amperes through the romex, which will drastically lower the requirements on AWG thickness and how hot the wire in your walls will get when drawing crazy-power.
Other than that I wouldn't really expect the amplifier to perform much better.
The amplifiers power-supply should theoretically run cooler at double the voltage.
The max voltage is limited by the rating of the capacitors and transistors of the power supply and output transistors, which for the clone is 200V caps. So like a: +-400V swing for a pair of caps working in tandem.
The max burst power is only limited by the rating of the capacitors and the output transistors ability to survive said power, if the power-supply is equally beefy then the limit becomes the circuit breaker.
For amplifiers that have very few or weak or no capacitors, like the inukes, then the power-supply must bear the full weight of the load. Which may or may-not be a problem.
There is no free lunch with capacitors, they rob power to charge them, so having 50lbs worth of caps in the amp won't really help you beyond a certain point.
Zero-point energy tapping circuits have yet to be invented outside of Area51, so you can forget that idea!
Capacitors merely help to provide power in between the wallsockets sinewave peaks, they only need to last 1/120th of a second until the next 120V or 240V sinewave peak arrives.
5 to 50% of the power the amplifier draws from the wallsocket gets converted to heat. That power NEVER makes it to the subwoofer.
I'm not sure how efficient voicecoils are, but rather than cone movement I bet most of its power gets converted to heat as well.
Box air spring resistance, air mass and cone mass and coil mass static friction resistance, suspension and spider friction resistance, aerodynamic resistance. blaa blaa blaa