Class D Technology

You said it booboobaer.   I haven't read the entire thread, but have followed its progress, and I know there are lots of smart people here talking about Class D switching noise, and zombies coming out of the power supply, and modules and cats and dogs living together, and basically the the worst parts of the Bible.  I don't know about any of that...and I concede that due to my lack of technical knowledge, it's possible that my Peachtree integrated is secretly plotting the overthrow of mankind right under my nose and I don't even know it.  All I can tell you is that there's beautiful music coming out of my speakers, and that my Audio Research integrated with new set of KT120 tubes has become a very nice rack ornament.

Well nothing’s perfect but in all honesty gotta say that Class D done well comes about as close in all ways that matter  as anything I’ve experienced in home/high end audio. Even without breaking the bank in some cases. If I were competing with it these days rather than benefiting I would definitely consider it a threat to my existence and take actions accordingly.

Well nothing’s perfect but in all honesty gotta say that Class D done well comes about as close in all ways that matter as anything I’ve experienced in home/high end audio. Even without breaking the bank in some cases. If I were competing with it these days rather than benefiting I would definitely consider it a threat to my existence and take actions accordingly.

Maybe we will start seeing Class D preamps then...

I think were already seeing digital/Class D integrated amps make significant headway. The technology is so good already (low noise floor and distortion compared to separates) that I see no need for a separate pre-amp these days anymore quite frankly. When time comes to replace my current pre-amp I will likely just go with a Class D integrated of some sort based on my experience to-date with digital Class D integrated in my second system.

Speaker cables would be a very poor antenna.  Since wavelength of 500kHz switching frequency is 600m a typical 2m cables would be 1/300 wavelength antenna.  Usually antenna becomes rapidly ineffective below 1/10 of the wavelength.

That's true, but in order to meet EU directives, UL and a host of others, the speaker cables are effective enough that the issue has to be addressed by any classD amp producer. In fact it is speaker cables that are mentioned when the issue of HF radiation is brought up in the design papers.

However, its so easy to address that I regard it as a non-issue. As I do the switching noise of SMPSs. The only reason we don't use the latter in our OTLs is the cost of custom SMPSs- its a lot cheaper to use traditional supplies!