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

The Benchmark AHB2 is the stellar performer here! So what it doesn't have glowing bottles to light up a dark room! 

carver dealer jim clark stereo offers 30 day money back trials for the carver

benchmark does the same for its products

not sure about rogue, but perhaps some its dealers will do the same

so op, you can ask here, and you will get input from unidentified strangers of unknown qualification and motivations, or you can try for yourself and decide what works for you

Will Vincent (autospec) has some really nice ST70’s for sale here! They will outperform and sound way better than the 275!

@pwoodard922 I have 3 preamps

- Topping pre90 ($600)

- Benchmark LA4 ($2500)

- CODA 07x (much more $$)

My KEF LS50 sounds incredible with the Topping pre90 and Benchmark AHB2's. I have AHB2 monos but will be splitting that up because the LS50s do not need monos. I needed to put the second mono somewhere. The Topping pre90 sounds just like the LA4, but with the caveat that, in my experience. it only sounds this good with the AHB2 and the Parasound A21+. I cannot recommend the pre90 with other amps due to the volume being too hot. Stereophile will review the pre90 in the Feb 2022 issue.

The LA4 is of course great with the AHB2. However, surprisingly I found the Topping pre90 sounded better with the KEF KC62 subwoofer I added with the LS50's. A pretty nice system. Maybe I did not setup the sub correctly (cut off at 80 Hz on the sub).

At the moment I am looking to get a very warm preamp (cheap) to pair with my second AHB2 for my RAAL SR1a headphones (for the bedroom). I am thinking of the Schitt Freya+ at $1000, Or maybe this,

Supratek Audio Chardonnay | Tube | Audiogon

Stick with the Rogue Atlas, had the exact set up and love the RP-1 (and it does have outputs for L/R Subs. I replaced my Atlas Magnum II with their M-180 Mono Blocks running into a pair of Klipsch Forte III's ...cant be beat frankly.