Bandwidth Limitations Of Class D Amps??

They all have the same characteristics with their mandatory switching filters on their outputs. And the ones that have smp power supplies have even another problem to deal with, regarding noise.
I'm not going to point the finger at any brands as that would be against forum policies. And I have been warned a couple of years back for it.
All you have to do is listen to them against good linear amps on a revealing system. Then look at any graph/tests done with power output vs thd in the higher audio frequencies and see how it rises very quickly vs lower frequencies, look if you can get it current output in the upper frequencies vs the lower frequencies. Then also if you get get them the phase shift from 10khz to 20khz. And then for good measure the noise figures in the upper frequencies vs lower.

" Class D " and the virtues of, a guru roundtable discussion setup by Absolute Sounds

http://www.stereo.net.au/forums/index.php?/topic/50607-class-d-and-the-virtues-of-a-guru-roundtable-discussion-setup-by-absolute-sounds/#entry843343

Cheers George

No I don't anyone here builds or sell class d amps either.
What I said and meant was
"there is a vested interset in a Class D amp"
Which means "A personal stake or involvement" in that amp.

Cheers george

Obviously there is a vested interset in a Class D amp and some are not open to what the best amp makers are saying.
The only ones that have bought out models of class D along side of their flagship linears amps are the ones who want to make money out of them. (It's called keeping the shareholders happy)because they are very cheap to produce compared to great linear designs.
It's too early yet to consider them in the hi end, like I have said I will be the first one to change over to them when the future technology for the switching frequency becomes much higher than it is at present, then they should be comparable or even beat a good linear designs.

Cheers George

-3db means there will be phase shift problems all the way down to 10khz.
Why some say the upper mids and top end is hard could mean the the filtering is too high and letting the nasty switching noise intrude.
Why some say the upper mids and top end is bland and opaque could mean the filtering is too low and effecting the harmonic content of the upper mids and highs.

This is why you'll see class d manufactures bringing out different versions or mk 1 2 or 3 They change the filtering to the above to either or a combo of both, which I think sounds the worst.
Once technology get more advanced and they invent components whith much higher switching frequencies so they then can use the filter so the effects and phase shifts of them are well out of the audible range then Class D will compete with the good of linear amps, until then it is comprimised, but great for subwoofers.

Cheers George

After listening to them and also measuring them, they do not come up to the sound quality or measurments of good linear amps in the upper mids to trebble.
I conceed they are great value for the money. But if one is into great sound and is an audio buff this is then where they fall down.
In the future when the switching frequency can be much higher then I can see even I will change over to them.
But at the moment I will stick with linear until that happens, and it will happen as technology advances with the high speed switching frequency.

Cheers George