Looking at their stock listings of PPI amps at acaraudio.com (anybody used them?) I noticed that for the new PPI amps, you don't get much of an RMS increase when going from 4 to 2 ohms.
For instance, the old PCX-440 • 40W x 4 at 4 Ohms • 100W x 4 at 2 Ohms
And the new DCX300.4 • 50W x 4 at 4 Ohms • 75W x 4 at 2 Ohms
So basically RMS *quadruples* on the old PCX but increases only by 50% on the new DCX.
Why is that? What does that suggest about the quality of the new DCX models?
I've heard some people say the new PPIs are crap, others disagree.
has to do with the power supply design for the amplifiers.. how tightly regulated the supplies are affects the efficiency when lowering the load on the amplifier.. some amps close to double their power, others barely increase over 50% at half the load. There are always trade-offs to regulated vs unregulated power supplies. This is one of them.
so that's why it seems like some people pop on five seconds after I reply to messages.. I figured it was something like that. darn notifications.. they don't give me time to get through the forum without getting flooded with posts by some people.. lol