After I posted up above the quote about "MOSFETS sounding more musical than bi-polar output device amps", I found some good discussion. Before this current "07 and 05" thread was started by CHP_VR, you were all posting in a thread under amps, receivers and processors entitled "SC-07, SC-05, VSX-03TXH, VSX 01TXH.." It is now at page 5 under amps, receivers and processors.
IN THAT thread, go to ITS page 5. Look about a quarter of the way down the page. Find a post by TDI Driver- The Speaker Shop- in Youngstown, OH. He is answering an inquiry and he starts out with "Stew, thanks for your question".
The questioner has a Pioneer Elite VSX-56TXi receiver, 3 1/2 years old, with no HDMI, of course, and TDI Driver says this:
In explaining to "Stew" why Stew's VSX-56TXI sounds so good, he says
"The 5x series was the last of the Elite MOSFET designs before the switch to bipolar receivers. IMO, the 1018 and the 01 will be a step back in amp stage from the 56 as the power stage is lighter and the capacitors smaller. To get the best upgrade from the 56 go to the 05 or 07".
He does not say that the 05 and 07 are better than the MOSFET design used by the 5x series and those prior. He doesn't even say they are as good as the MOSFET receivers. He just says that to get the best upgrade from the 56- and that could be because you would be upgrading to an HDMI receiver, to go to the 05 and 07.
If you are reading this, TDI Driver, I would be most grateful if you would weigh in here on this. Are the ICE amps in the 05 and 07 as musical as the MOSFET amps in the 5x series and prior?
And I have to agree with you Catapult that the fact that those top-line amp makers are using ICEpower is a strong recommendation. I know from nothing about class D amps and admit it, in fact, proclaim it so you'll all know just how ignorant I am about this. GOOD and ignorant. So please let's hear it from those who know what MOSFET amps sound like and can compare that with how the 05 and 07 sound.
To me, it's all about how it sounds. I have long felt that receiver makers cram loads of bells and whistles into their products and shout a lot about all that, when what counts in the end is how they sound. Maybe they think that if they don't really sound so great, they can sell them with all the extra BS features they pile in. And you DO see the fixation on bells and whistles in all this discussion. It works! People get to favoring a receiver or company because it has this or that room correction algorithm, when what counts in the end is "how does it sound!" and its the amps that determine that, largely.
Catapult- So the Pioneer 5x series receivers were not class D amps? I do not know. Apparently they were not. So then class D amps don't come as either MOSFET or bipolar? They are neither, apparently, right?
One tiny extra thought- I called the AVS store a month or so ago re the Marantz AV 8002. He told me they don't carry Pioneer Elites. I was telling him about my Tandberg, and he said a lot of people are into vintage amps and vintage receivers. Last night I found a big website devoted that them. People really get into them- including into tube amps- and a big reason is- surprise!: How they sound.
Originally Posted by catapult
Well, as I said in another thread, ICEpower can't be too bad if companies like BelCanto, Mark Levinson, PS Audio and Jeff Rowland are using it. Maybe it's not the best you can buy at any price but I'm pretty sure it doesn't suck.
And yeah, the old MOSFET/bipolar argument doesn't apply to Class D switching amps like the 05 and 07. That would be a discussion for the 01 and 03.