Why Don't We See More High Current Electronics?

03-15-11: Foster_9
Maybe a 80-90 lb amplifier but not much more.

I think my Pass Labs amps (XA-30.5 and XA-60.5) weighed about 60 lbs per chassis. The XA-30.5 leaves Class A at 60wpc peak power, and the XA-60.5 leaves Class A at 120wpc peak power.

03-15-11: Tmsorosk
...there may be other reason's it doesn't sound bright other than just the double down aspect.

Could be, but I'm sticking with the double down aspect. The details of it are thoroughly explained in "The Complete Guide to High End Audio" by Robert Harley.

My present amps don't double down and they aren't solid state. I replaced the speakers that required that type of amplification.

...to add a pertinent detail. When I was experimenting with amps that doubled power as impedance is halved, I auditioned or owned four amplifiers...all at different price levels and build quality. In each instance, these amps produced balanced sound whereas amps that did not double down produced sound that was "bright".

The amps that doubled down were: Bel Canto REF1000 MK II monos, Belles 150A Reference monos, Pass XA-30.5, Pass XA-60.5 monos.

Although I always have the greatest respect for opinions expressed by Ralph (Atmasphere) and Grant (Tvad), and I almost always find myself in agreement with both of them, in this case I think that their posts are commingling two separate issues.

ANY amp having negligibly small output impedance, such as most solid state amps, WILL double the amount of power that is delivered into a halved load impedance, PROVIDED that it is operated within the limits of its maximum voltage, current, power, and thermal capabilities. That is a matter of basic electrical engineering principles. If in fact Harley disagrees with that he is wrong.

Most, and perhaps nearly all, tube amps will not do that, BECAUSE their output impedance is not negligibly small.

All of that is essentially a separate issue from the one I believe Emerson (Foster_9) was asking about, which I believe concerns whether or not the MAXIMUM power ratings of a solid state amp are twice as much for a 4 ohm load as compared to an 8 ohm load.

03-15-11: Tmsorosk
...there may be other reason's it doesn't sound bright other than just the double down aspect.

I suspect this is correct.

Best regards,
-- Al

Okey-dokey. I'm bowing out.