I got mine from someone who had been driving them with a 50 wpc tube amp in a room about 12 x 15. He had been very happy with that combination. ( Sold because of low WAF for multiple systems. ) Other sources have also been happy with the Shearwaters ( 88-89 dB/W sensitivity ) combined with tube amps in that power range.
I myself am using a ss Celeste W-4070se ( about 70 wpc ) with my Shearwaters There is gobs of power for my 15 by 22 room.
Another possibility might be Reference 3a. The DeCapos are rated at 92 dB/W. I heard them do very well with Antique Sound Lab 10w tube monoblocs at the 2001 Montreal show.
I myself am using a ss Celeste W-4070se ( about 70 wpc ) with my Shearwaters There is gobs of power for my 15 by 22 room.
Another possibility might be Reference 3a. The DeCapos are rated at 92 dB/W. I heard them do very well with Antique Sound Lab 10w tube monoblocs at the 2001 Montreal show.