non built-in amplifier cd receivers

Why yes, there would be an amp limit, Sony, Lanzar, Pyramid, Lagacy, and a few others will inadvertantly blow up your cd player .  haha naw.

But if your talking about connection of your receiver to a power source. no not really.  it will suck what it needs, just be shure its a 12 volt source.  Connection to the factory harness via an adaptor is perfectly fine.

Yes, that's a big improvement in HU technology.  Apparently Alpine and Blaupunkt have also signed deals with Tripath, and there are several stand-alone amps coming out of Taiwan now with the Class T topology.  Very high sampling rates (1.5 Mhz and up) make it possible for the high power utilization and high output levels before clipping.  Look for much smaller frame sizes for a given power rating.  Tripath has a chip that outputs 1000 watts with <0.1% THD and <0.1% IMD that is 85% (85%!!) power efficient.  Wow.  And they are working on higher outputs.  I have a couple of the new MA Audio Class T amps on the test bench now that should get put through their paces this week.

Digital still cannot compare to true analog for SQ, but they are getting closer all the time.

DYohn,

How good are MA products.  I have been running a 800 watt class T amp for over a year and it has not over heated once.  The amp has been test and runs a little of 900 before clipping.  I am looking at getting another amp but don't believe in using what everyone else is using... 

Let me know what you think about the MA amps when you are done testing.