Atma-sphere amps have been mentioned, and imo they work very well with SoundLabs (disclaimer: I'm a dealer for both).
One of the nice things about the Atma-Sphere amps is that you can pull out some of the power tubes and run them at reduced power and therefore reduced heat. Not that a pure Class A tube amp is going to be cool-running! But with a pair of MA-1's, for example, you can essentially optimize the number of tubes used for your needs.
When I lived in New Orleans it was in an old house that used window-unit air conditioners. I had some very quiet ceiling fans professionally installed. At a low setting the ceiling fans more than doubled the listening time before it became necessary to take an AC break and turn on the window unit to cool down the room.
The ideal would have been to place the amplifiers in an adjoining room. Because of the already low output impedance of the Atma-Sphere amps, the series resistance of a fairly long run of speaker cable is not an issue. Likewise the balanced connection between an Atma-Sphere pre-amp and amp is long-run-friendly, so the preamp can be in your listening room while the power amps are in another room. This may not be practical in your situation, but I mention it just in case.
Duke
One of the nice things about the Atma-Sphere amps is that you can pull out some of the power tubes and run them at reduced power and therefore reduced heat. Not that a pure Class A tube amp is going to be cool-running! But with a pair of MA-1's, for example, you can essentially optimize the number of tubes used for your needs.
When I lived in New Orleans it was in an old house that used window-unit air conditioners. I had some very quiet ceiling fans professionally installed. At a low setting the ceiling fans more than doubled the listening time before it became necessary to take an AC break and turn on the window unit to cool down the room.
The ideal would have been to place the amplifiers in an adjoining room. Because of the already low output impedance of the Atma-Sphere amps, the series resistance of a fairly long run of speaker cable is not an issue. Likewise the balanced connection between an Atma-Sphere pre-amp and amp is long-run-friendly, so the preamp can be in your listening room while the power amps are in another room. This may not be practical in your situation, but I mention it just in case.
Duke