One thing I don't get about McIntosh amps (although I love their aesthetic) is that the power output does NOT increase with decreasing impedance.
So it's like 250W into 8 ohms, 250W into 4 ohms, 250W into 2 ohms, instead of 400-500W into 4 ohms and 600-700W into 2 ohms. It seems like a "handicap" to me. I don't get it.
I thought the main point of getting external amps is for higher power output, especially for 2-4 ohms?
This is actually not quite true. If you plug an 2 ohm speaker in the 8 ohm tap you will get more watts than what the amp is rated for. If you plug an 8 ohm speaker into the 2 ohm taps then you will get less.
The rating for the power where you get the same output assumes you impedance match the speakers to the taps. So if you plugged a 2 ohm speaker into the 2 ohm taps you will get the same power output as an 8 ohm speaker into the 8 ohm taps.
I’ve seen a bench test on the MC452 (which I own)and if you plug a 4 ohm load into the 8 ohm tap it produces approximately 1.5 times as much power. I believe the test produced 730W from a 4 ohm load and something like 950W from a 2 ohm load into the 8 ohm taps (and approx 490W into 8 ohm load).
Edited by BVLDARI - 1/8/14 at 10:20am