"Warm Sounding" Solid State Amplifiers

I've owned a Perreaux 2150B and several Acoustat TNT200 and 120. All pure mosfet so I have some insight into the warm/tubey/mosfet sound and imo it's nothing more than a softening of leading edge transients. In effect resulting in what to me sounds like a bit of IMD or TIM. Imo BJTs sound better because they're effectively faster even though the device itself may not be. Whether this is deliberate or not, I don't know but I find BJTs to have better, more refined low level resolution. I think once you reach a sufficiently high level of fidelity, the novelty effects disappear as a matter of course. If the goal is reproduction of the signal, then the last thing you want is to be able to pinpoint the topology of the amp, no?

What is LSR&D ? I have to agree with Ralph that live unamplified music does have warmth.Depends on variables,as to the degree of warmth.I do love harmonics as well.I don't give a hoot as long as it sounds good. If loving you is wrong,,,I dont wanna be right,,,

Pontifex,I like your speakers,from what I remember going up to the Golds you will have more detail and treble will be extended,so an amp with a bit of warmth may be just what the doctor ordered . At your budget,you have some great choices,that should keep you happy for a long time.As I said ,i am still kicking myself for selling my Conrad Johnson SS amp,it did the 3-D ,depth,room filling soundstage,and warmth like no other amp i have had.It is like you can reach out and touch the notes as they float in the air around you.Only time I've had that silly happy grin. I may get one of the newer SS amps they came out with,when budget allows.Whatever you decide ,I hope it makes listening a joy.

A lot of musical instruments produce music in the 100-300 hz range or so typically identified as the general range for "warmth" so it is not a surprise to hear that in live music or in a good hifi reproduction. The devil is all in the details. Some music may have little or no warmth at all and that is perfectly natural.

LSR&D is the company logo comprising the initials of 4 partners headed up by the late Dr. Marshall Leach at Georgia Tech University in the 80's. Bickering and in-fighting led to the company's early demise so few examples exist. Dr. Leach did offer the amp in kit form and there is a substantial following on DIY Audio. Lots of info on the net, re: The Leach Amp/ The Leach Superamp/ LSR&D.