Thiel 1.6 - bass

There is no amp that is going to get your Thiels to go where they cannot go. Lets face it: a 6 1/2" woofer, does have some lower extension limitations. A sub is the way to go. You'll get tons of threads about this. I auditioned the 1.6s (after owning the 1.5s) and opted for the Revel M20s. They, too, require a sub. I use a Sunfire Architectural--10" front firing. Powerful, fast, tight, deep extension and small. Integrates beautifully with my Revels. Seamless. People usually think of Sunfire and home theatre, but this speaker was designed by Carver for two channel listening. The big one is the Architectural Signature. 12" front firing. Probably more than you need. Can be found nicely discounted. Give this baby a serious consideration. I listened to many subs. I'm very happy with my choice.

Well, I have very limited experience with the 1.6 - actually auditioned them and they were powered with a Bryston B60 integrated. I thought this setup gave excellent results. However, I don't think there is any way to extend their low end power -- they just "won't do the lowest octave" per the reviews. As for a sub -- I will soon be in the market for one myself and am leaning heavily toward a Vandersteen 2wq or the smaller Logan sub. Both are reported to be very "musical" which is what I value over "house shaking" bass. Judging by your speaker choice, I think you feel the same--good luck in your search.

I use a Rel strata with mine and it gets that extra octave plus in a smooth seamless manner. The combo is better than the Aerial 10T's that I traded for the Thiels and Rel.