Sirspeedy - your comments on the Aesthetix gear raising the room temp gave me an incentive to do an experiment today. Unlike many other Audiogon members, I do NOT keep my tube gear on 24/7.
The system is in a basement room, 13x18x7.5, fully closed with only a stairway entry which can be closed off with a door atop the stairs. Before powering on any components, the room temp was 68 degrees; the thermostat is on the ground floor. The A/C has been running much of the day but there is only one very small ceiling vent which is above and just a little off axis of the CAT amps. The rest of the audio system is on the opposite end of the room.
The Callisto and the Io were powered on; I only have one power supply for each. An hour later, the room temp had risen to 69. I checked an hour later and still 69. And then another hour ..... still 69. From this I would conclude that the Aesthetix preamp components do little to affect room temp and again, this is a rather small and confined area. In a more open living room or family room setting, I suspect it would not be noticeable at all.
I then powered up the CAT amps. An hour later and the room climbed to 74! Another hour has passed and now the room is sitting at 75. Having 32 power tubes radiating makes for quite serious floor heaters. Clearly the amplifiers are an issue in this room whether it is summer or not. But at a local audiophile's home, I noticed how much heat the solid state Plinius amps were producing. It's the price some people pay for this kind of musicality. And there is much shared here about the Pass amps as serious floor heaters as well. So it's not only an issue with tube products. But I think that tube preamps are not going to influence room temps very much if at all.
John
The system is in a basement room, 13x18x7.5, fully closed with only a stairway entry which can be closed off with a door atop the stairs. Before powering on any components, the room temp was 68 degrees; the thermostat is on the ground floor. The A/C has been running much of the day but there is only one very small ceiling vent which is above and just a little off axis of the CAT amps. The rest of the audio system is on the opposite end of the room.
The Callisto and the Io were powered on; I only have one power supply for each. An hour later, the room temp had risen to 69. I checked an hour later and still 69. And then another hour ..... still 69. From this I would conclude that the Aesthetix preamp components do little to affect room temp and again, this is a rather small and confined area. In a more open living room or family room setting, I suspect it would not be noticeable at all.
I then powered up the CAT amps. An hour later and the room climbed to 74! Another hour has passed and now the room is sitting at 75. Having 32 power tubes radiating makes for quite serious floor heaters. Clearly the amplifiers are an issue in this room whether it is summer or not. But at a local audiophile's home, I noticed how much heat the solid state Plinius amps were producing. It's the price some people pay for this kind of musicality. And there is much shared here about the Pass amps as serious floor heaters as well. So it's not only an issue with tube products. But I think that tube preamps are not going to influence room temps very much if at all.
John