Amp for Sonus Faber Amati Futura

Can you describe a little bit on the sound with boulder and Amati?
Is the bass any good?

I'm sure some will disagree - especially tube amp fans - but in my opinion big speakers like yours need big power and especially big current.

So noting that your Vitus monoblocks only put out 100 watts, I'm wondering if a lack of strength is your issue more than anything about the way the Vitus are voiced. FYI, this year's Stereophile review of your speakers used 600 watt Classe and 440 watt MBL monoblocks.

If you want to stay with Class A amps, Gryphon amps are noted for being bass monsters and for providing high current. And my Symphonic Line Kraft 250s provide very strong bass as well to my Revel Salon 2s, which are also large speakers and even less efficient than yours.

In any event, if you are thinking about Boulder amps then you obviously are in a good position to look at brands like those I mentioned above, along with other well-regarded brands such as FM Acoustics, Soulution, Goldmund, Clayton, Spectral etc. etc. etc. Happy hunting!

Can you describe a little bit on the sound with boulder and Amati?
Is the bass any good?

How about Violalab, Bravo2 power amp. It's dynamic and musicality with Amati futura is excellent.

I'v read at shows with Sonus Faber using the Futura's with the Rel gibraltar g1 sub.
From 2013 Audio Expo North America (AXPONA) - Chicago

http://positive-feedback.com/Issue66/axpona132.htm

The equipment in this room included the Sonus Faber Amati Futura Speakers, REL G1 Subwoofers, and a large collection of Audio Research gear: ARC Reference 250 monoblocks, DS 450M monoblocks, Reference CD9 CD player, Reference 5SE preamp and Reference 2SE phono preamp. The turntable was the Clearaudio Innovation Compact fitted with a Benz Micro Zebra cartridge. Wire was all Kubala-Sosna Emotion.

The Medallion Room on the main floor at the Double Tree O'Hare was one of the largest venues at the show. Despite all the odd dimensions and curtains everywhere, the acoustics did not seem to throttle the quality of music.

I must provide full disclosure. I am a huge Sonus Faber fan. I have owned all three iterations of the Amati: the original Homage, the Anniversario and now the Futura. I have also owned the Strativari Homage and the original Guarneri Homage. All have strengths and weaknesses. All are known for a rich detailed midrange. Extraordinary at all frequencies, the Futuras follow in the Sonus Faber tradition of musical performance but they also add a new level of incisive attack and inner density. They did not disappoint at this show.

This was my first listening experience with the REL G1 Subwoofers. They were stacked two per channel and behind and outside the Futuras. Having heard the Futuras with the then state of the art REL Studio III Subwoofer in my own listening room, I was very impressed with the G1. I now understand why the Studio III has been discontinued - gone but not forgotten.

Bass seemed to be tighter with more slam and improved dynamics. I was not able to do a comparison with and without at the show, but my guess is that the G1 was providing the same if not better results as the Studio III when combined with the Futuras. Sound stage and imaging were excellent and well extended. Highs and mids were as good or better than I have ever heard with the Futuras. If integrated properly, subwoofers can make a significant impact on the entire frequency spectrum.