Do all Class D amps lack soundstage depth?


Hello!
Recently I bought a class D amp for my friend from Audiogon - PS Audio Trio A-100. In general, I liked it sound very much. Compared to the power section of my much cheaper integrated amp (NAD C320BEE), Trio A-100 sounded fresher, more transparent, richer and juicier. NAD was obviously duller and more reserved. Trio A-100 seemed to energize the air with a sort of vibrancy, while NAD seemed more lifeless. (Of course, I am exaggerating the difference between the amps a bit to make it more clear how they differ from each other.) However, Trio A-100 lacked one parameter, which is very essential for me and without which I cannot truly get lost in the music – namely, the soundstage was flat. It wasn’t absolutely flat, no – but NAD did so much better in this department. When NAD was playing, I heard which instruments and singers were farther from me and which were closer to me. When Trio was playing, everything seemed to be on the same line, equidistant from me.

The previous owner of PS Audio Trio A-100 had told to me about its sound before I bought the amp from him, and he frankly admitted that the soundstage was kind of flat. Before this purchase, I nearly bought another Class D amp – namely, Bel Canto S300. Eventually, this amp went to another buyer, but the owner shared with me his impressions about this amp and, among other things, he wrote: “There might be less depth with some recordings”.

So, at least two owners of Class D amps confessed that their amps lacked soundstage depth.

I wonder – are all Class D amps like that? Is the lack of depth something which is intrinsically inherent in Class D?

My second question is – what if I buy TWO Class D amps and use them as monoblocks – will it solve the problem with the flatness of the soundstage?

Any advice based on personal experience will be much appreciated.
ironmine

Showing 8 responses by tholt

When you find something you like, appreciate it.
Oofer (Threads | Answers)

thanks for the reality check. it's hard to leave well enough alone
Is there a reason why you're so caught up in class D?

I've read many things about class D, esp before I bought mine, and there was never a mention of flat dimensionality. What are your speakers? Have you determined that specs/wattage of the class D's you've looked at and/or interested and your speaks match up well on paper?
whoops, we must have posted at the same time. How about contacting your speaker manufacturer and asking about recommended amps?
To answer the OP's question -- no, not all class D amps lack depth. I believe it's a compatibility issue he's experiencing with his gear.

To answer his second question -- if there is a gear incompatibility, then 2 of the same incompatible amps will not solve the problem of imaging, though may sound better in other areas.

06-12-09: Tan43
The other components in your system affects the class D amps
more then you would think.

I echo this sentiment 100%, though disagree with balanced interconnects. You don't need these for soundstaging (!)

I have Nuforce amps paired with a tubed pre, all copper and single-ended cabling, and have truly dimensional imaging.
The OP states that he had better soundstaging with the NAD, and previous owners of the class d amps he's heard/owned both have commented on a lack of dimensionality in the soundstage, i would agree with Br3098 re amp>speaker matching, and also speaker placement. If you can move your speakers into the room more I wager soundstaging would increase regardless of amp.

As has been stated, many owners of class d amps don't have imaging issues.
06-13-09: Br3098
Tholt, when I said "try another amp" I meant to say try another brand/vendor of amp. I did not mean to suggest that you keep trying the same model/vendor over and over again. There will be a "right" combination, but it may take a while to find it. That's the problem with our hobby (my wife says addiction) - so many choices and so little money.
Br3098 (Answers)

I know this is what you meant. My comment was directly toward the OP's second question
My second question is – what if I buy TWO Class D amps and use them as monoblocks – will it solve the problem with the flatness of the soundstage?

to which I said no, I don't believe it will "solve the problem", at least to the degree he may be looking for since essentially he'd be going with the 'two wrongs make a right' theory, but 2 class d's may improve other areas of sound. Again, I believe it may be a compatibility issue with class d amps and something else in his chain since he got much better imaging from his NAD.