I have a question. I keep reading there are different versions of the Puma amp. Is there anything that can distiguished them? I just got a used Puma 900 i dont know if there is diferent versions and when did this amp came out?
As alluded to above, the original Puma500 used a Powersoft power module, and was 2 rack space. The voicing was VERY hi fi... deep, deep bass, and very little midrange distortion. The new Puma500 uses the more typical (and more reliable) B&O Ice power module (although I believe they use a bit higher end model in that line than other manufacturers.... lots of different ICE modules).
There is a difference in voicing... less deep, sub bass, and a bit warmer (i.e. some pleasant midrange distortion) that makes the amp seem a bit louder, and more controlled down low. The revoicing moved this amp (and the 900) a bit closer to the Markbass F500 (I had a small part in the revoicing of the amp, gigging a prototype and providing feedback), although it is still clearer and cleaner in the midrange, and a bit more 'hi fi' up top.
The Puma900 is a new model... basically the bigger brother of the Puma500... same voicing to my ear, a bit more ooomph.
The Puma1000 is still in the line, but IMO makes little sense given the 900 now in the line. Originally, the Puma1000 put out full power into 4ohms per side when run in dual mono. This resulted in it being limited to 8ohm bridging, which reduced its appeal for those who had a single, large 8ohm cab. The change was made (according to a number of discussions I had with various people associated with the brand), to allow TecAmp to provide a very high powered, 4ohm friendly head that could drive a 215 or high end 410 or 212 at 4ohms. This, of course, reduced the power when run in dual mono mode.
Since the 900 came out, and puts out its full power into 4ohms, and significant power into 8ohms, the Puma1000 is kind of the 'ugly stepsister' of the line IMO. My guess is, it will be discontinued eventually. I guess its original design goal of powering a cab and a 'pleasure pad' is still valid, but I assume that is a VERY small part of the market.