How does the Sunfire Cinema Grand Signature get so much power from a pkg that size?
I'm looking at the Sunfire Cinema Grand Signature amplifier. It's rated at 405 watts/channel into an 8 ohm load with all channels driven, can drive 4 ohm and even 2 ohm loads on a time limited basis which tells me it should be using some beefy power supplies, yet weighs only 38 pounds. 405 watts/channel X 5 channels seems like more power than a 120 volt, 15 amp amplifier should be able to produce.
How does it do it?