most likely candidate would be Kinergetics subs they were made just for the spicas. I would still look for a Rel sub there a bargain on the Gon for what you get and they mate well with almost all speakers..
Subwoofer recommendations for Spicas TC-60's?
I have a pair of Spica TC-60's powered by a Forte Model 4a Amp and a Threshold NS10 Preamp. I love the musicality and imaging of the Spicas but would like to get more lower frequency responses. I listen to classical, vocals, jazz and some rock. Recommendations for a reasonbaly priced and smaller sized (limited space) subwoofer to match my Spicas will be greatly appreciated.