High efficiency speakers for Shindo


I recently bought a Shindo Aurieges pre and think that a total revamp of my system is now in order. After doing some research it seems that the best match for the pre is, surprise, surprise a Shindo tube amp. Since I'm on a budget, the entry level Montille is most realistic, its a flea powered 15 wpc push pull. I'm thinking that this won't do with my Gershman Avant Garde's which are a rather inefficient 87 dB, so I may have to trade em in.

But I do love the Gershmans for their great bass response and silky mids. Can anyone suggest a high eff speakers (say 90+ dB) that would mate well with the Shindos and also give me good bass slam so that I won't regret selling the Gershmans. My basement room measures about 13' x 20' but with a 6' ceiling. I listen to a huge range of music - classical chamber music, jazz, indie rock, electronic, everything from Albeniz to Zappa.

Speakers that I've been considering are Audio Note, Living Voice, Ref 3A. Others have suggested single driver speakers like the Omega which are intriguing, but can they really rock out? I'd like to keep it below $5K used. Any other suggestions or thoughts on what would be a good fit?
mikeyc8
http://www.kcscustomloudspeakers.com offers models in your price range we also custom build loudspeakers designs.And can use most any finish to help with WAF. We have a BLH 2 way 16ohm 98db 1 watt 40hz-40khz. We also have a design for SEAS fullrange and a few ribbon systems that can run off med-low power amps. All of our designs produce good bass. Some to 25hz.
Audio Note A/N E is a great match with any SET gear. Shindo is wonderful sounding equipment and the A N are high on my list. I have a pair and for the first time in a long while I am not searching for "something" else. I am driving them with an AN Oto as well as a Don Allen 300B with his matching preamp. I switch around a bit.
A 15 watt tube amp is not going to work with the Gershmans. I've heard 30 and 40 watt tubes with the Gershman Avantgarde, and they don't work either. They can't control that "mass loaded" woofer with the ring on it.
At lower volumes, you're okay, but if the music has a lot of deep bass in it or if you have to play loud, that woofer flops around like crazy, exaggerating and muddying the bass.
I own a pair of KCS Oris 150 horns, a seriously good producer of beautiful music for the discerning listener.