SOUNDLAB ULTIMATE 545

A customer of a local dealer replaced his Atma-sphere MA-1s with Convergent Audio amps and instantly regretted this decision. The CA amps werent bad, the MA-1s were just much better, he felt, on his speakers. I own MA-1s and need to send my Quads (63s) in for a refurb. but am using the amps with dynamic speakers at present. 

@pinotnoir What time of day are you calling? They are on mountain time.

Sorry every body, finally I contacted.

Everybody (Tipo)
Thanks atmasphere9, I´ve been talking to them.

@miko71 , This is true for the smaller speakers. The 8 foots speakers will make bass down to 40 Hz fine even at volume but subwoofers do better and using a high pass filter on the Sound Labs lowers distortion quite a bit by preventing the diaphragms from taking long excursions.
If you like rock and loud jazz IMHO subwoofers are mandatory but then again this is true of most dynamic speakers.

Pinotnoir, The only tube amps I would use on the Sound Labs are the Atma-Sphere MA1 or MA2. The MA2 seems to be a favorite. I have no heard one but Roger West relates many Sound Lab owners prefer this amp. They are vastly different to other tube amplifiers. They are also more powerful into the Sound Labs than their power ratings suggest. I think you can safely assume they are equivalent to a solid state amp of twice the power. Not every solid state amp will drive them well. I know for a fact the Parasound JC1 will drive them and I suspect other high powered class A amps will also. The JC1s sound more like a tube amp than a solid state amp. I am a huge John Curl fan.