Re: What does this mean on an amplifier
The total efficiency of an amp is the combination of the internal power supply and the amp output circuitry. Having designed power supplies for a living I can say that 90% is really good for a high power supply. 80% is typical.
A Class AB power stage has a theoretical maximum effieciency of 75%. Combine that with an 80% efficient p.s. and you get 60% total. The one you're quoting is bragging, rightfully. And I would assume it's a Class D, right?
1999 Buick Park Ave Ultra
Head Unit: JVC KWHDR720
EQ: Audiocontrol EQL
Front Stage: Hybrid Audio Technologies Imagine 5.25
Sub Stage: In process (will be Boston G310)
Amp: Boston Acoustics GTA-704 4 Ch
Rear Fill: Boston SE953 6X9's