Anyone using the Transistor Research LabsM 225's

Tvad, I suspect that your suspicions are correct :)

All of the Class D trademarks are present. The sound, the lack of heat, the efficiency, and the price, all add up to scream Class D!

Fiddler, so are you saying that these are Class D amps or that these just sound like Class D amps?

FWIW, I've heard a few Class D amps and while they have sounded very good (especially for the money), none exhibited the sound of my TRL D-225.

I have found the Class D amps I have heard to be very transparent, neutral, and they are very efficient. However, they lacked a very key component IMO to what the TRL offers and that is presenting the music in a very natural life like manner. There could be Class D amps that do this, but none that I have heard. I think its why tube preamps are a good match for Class D amps.

Tvad and others with interest. For some time due to intellectual property concerns the D-225/ST-225/M-225 amps were "locked down" and unable to be opened. Now that those concerns have been addressed the amps innards can be viewed. I was just on the phone with a new Samson owner the other day who gave me a very detailed description of what was inside. From my previous knowledge and experience it was consistent with what I already knew and provided some additional insight on the design.

And what did you find out, Clio?

Well I have the amps in my home per the review. Yes, one can take the cover off and look inside if they want.

These are Class A/B and not Class D. Not sure why Fiddler suggests some of us (owners) are not telling the truth?

Tvad, you had mentioned you did not care for the Nuforce amps and thought that (Class D) may be the type of amp and sound of the Samsons. This was the reason for my short comparison. Clio09 also gave some spot on differences in the sound quality of Class D amps vs and these Samson amps.

Paul's has designed a new power supply that is greatly responsible for for the ground breaking musicality of these amps.

Clio, I have not heard the M225's or the D225 (could the "D" simply stand for digital and the M for mono blocks?).

Make no mistake. I am not disparaging Class D. I have often wondered whether I should sideline my Berning and try a Bel Canto, Spectron or Rowland. I love the purity of Class D. I had a PS Audio HCA2 which I modded with upgraded caps, solid silver wiring, etc. This was early Class D and probably far from current state of the art, but I enjoyed the amp after modding it.

My only question here is whether TRL would avoid disclosing the design of the amp if asked? I know that TRL is famous for hiding what they consider to be proprietary work inside their products by pouring epoxy all over many of the parts. There is also a very unflattering thread on Audio Circles about TRL and the very poor quality of their work (alleged in the thread).

I personally know nothing of TRL, but the rave reviews of the M225's have piqued my interest, but so has the negative thread on Audio Circles.