Classe Delta Stereo Amplifier


I recently ran across an advertisement for the Classe Audio Delta Stereo Amplifier. I read on the Classe website that this amplifier is rated 250 into 8/500 into 4, but then 350 into 2 ohms. Should the significant drop in power at 2 ohms be a concern for speakers rated 4 ohms with drops down to 2.5 ohms?  Also I noticed this amplifier uses a relatively silent fan and internal aluminum tunnel (upon which the transistors are mounted) for cooling, without heat sinks.. Is a cooling fan just one more thing that can go wrong, rather than effective and non mechanical heat sinks?
Thank you!
audiobrian

I heard this stereo amptoday. Driving B and W speakers . I couldn’t hear the fan. I was impressed by the balls of this amp. Watt meter barely moved at normal listening levels. The IC tunnel pumped all the Class A heat out the back rendering the amplifier cool to the touch. Even if the bearings wear out at 100,000 hours it would be a 20 minute swap for me to put in a noctua fan if it has a push on connector . I much prefer heat outside than inside my amp. These amps would be on my shortlist anyday. And they have a quality fit and finish that can’t be conveyed by fotos

Also, it’s power isn’t rated 20-20,000khz but at 1khz. Kinda weak sauce 
The power drop with impedance is important only if you plan to be using the full power of the amp. Not likely.

I auditioned a previous Classé amp (CA-2300). In my very quiet room, I could sometimes hear the fan running during quiet passages of music. For that reason, I didn’t buy the amp.

If your room has higher background noise, fan noise might not be a problem. IMO, it’s a poor design decision to put a fan on any high-end audio device. No fan is silent, and every fan gets noisier as its bearings wear. Yet Classé seems locked into this "IC tunnel" design of theirs. Can you think of many other high-end manufacturers who put fans on their power amps?