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Old 2nd December 2008, 02:38 PM   #31
Eva is offline Eva  Spain
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Those low impedances are ideally suited for low-cost class D. Switching higher currents is easier than switching higher voltages. Some recent MOSFET models like IRFB4310Z allow to produce 1KW at 1 ohm with just one pair of TO-220 output devices.

Large class AB amplifiers with a dozen or more output devices per channel are very likely to become phased out within the next 10 years. Smaller ones are likely to survive.
I use to feel like the small child in The Emperor's New Clothes tale
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Old 2nd December 2008, 02:58 PM   #32
wg_ski is offline wg_ski  United States
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Originally posted by MJL21193

I'll go out on a limb here and say that it is probably no big deal. Almost any decent amp can swing 1000 watts into that low a load - briefly, given enough rail voltage. To maintain this power at that impedance requires lots of outputs., with just a run of the mill front end to drive them.

The real trick is maintaining that rail voltage for longer than a millisecond or two. All the outputs in the world paralleled together won't help an amp put out more than 100W/8R if the supply drops to +/-42V under load.
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