Which power amplifier match audio research ref 3

I have a Ref 3 with Pass Labs 350.5 sounds good believe the XA .5 series would sound better if funds permit. Good Luck and Happy Holidays.

I have the "baby version" of the match you are proposing, in my case the ARC LS-17 paired with ARC's 150.2. I think they work very well together driving my Maggies. However, I'm sure you are aware that the 300.2 is one of ARC's first class D amplifiers, and there is a wide range of opinions about them. Based on my own experience I think the 150.2 and 300.2 sound fine (and in fact the Absolute Sound reviewer bought his review sample of the 300.2), but they were never meant to compete with ARC's own Reference Series tube amps, such as the Ref 110 (i.e. ARC themselves would maintain that the Ref series amps were of higher musical quality). The synergy is there, but you should listen for yourself.

ARC 300.2 can go well with reference 3?
Why isn't blue circle bc2 not working well? Is it because of the low gain (5.6dB) of the ARC reference 3?

I have a ref3 with Simaudio Moon W6's and the sound is great.

I have to agree with the Audio Research. The same design team will have created them both, with the same performance character that makes each one together, better than their separate performances.