Suggestion between benchmark Ahb2, Bob carver crimson 275 and rogue atlas magnum 2 amos

I have the Carver 275 amp and think it sounds terrific.  It does run relatively cool.  Give it a try as they have a generous return policy.

Carver for sure. It’s made in the USA too. 

I can’t speak to the Carver unit, but the Benchmark and Rogue units should both prove fine, but with somewhat different tonality. Also I echo the comment of @avanti1960. The Rogue Stereo 100, which I ended up purchasing, to me is audibly better than the Atlas. The 100 had more clarity and better transient response. More than enough power in the Rogue or Benchmark units. Can you borrow the amps to audition at your home? That will certainly help you decide.

As to adding one or more subs, should you be interested, the REL T/x series are a good match, musical, and REL recommends using high level inputs, wiring to the sub from the speaker outputs on your power amp rather than a low level input from a preamp. (REL provides the necessary cable with their sub or you can purchase an upgraded cable.) So your purchase of the Rogue preamp does not preclude adding one or more subs. I think you will find many if not most Audiogoners with REL subs use the high level output.

Happy listening!

Thumbs down for the Carver 275 amp! It uses 15 watt Edcor output transformers that certainly can't make the claimed 75 watts at reasonable distortion! In fact at 15 watts/1khz it does 1% distortion. At 32hz it is at 2% and rising. Carver's claim that this is a 75 wpc amp is fraudulent and a violation of the FTC rule. This amp can't even pass decent sine waves at reasonable power! For its high sale price it is a rip-off! Buy a nicely restored Dynaco ST70 instead - Dan Vincent has some for sale here on Audiogon.

@cdennison53 : "It does run relatively cool". The 275 amp is seriously under-biased! Plenty of notch distortion! Sure, the output tubes will last forever but at 10%+ harmonic distortion! Clearly a broken product!