I use a C3 with 6.3s for HT and I think Soliloquys are very good. I use an 8' Kimber Bifocal XL cable on the C3 and it sounds great.
I do want to mention an experience I had with the C3 though. When I first got the 6.3s and the C3 I had a Pioneer Elite VSX 49TX Amp. Everything sounded great (especially after 500 hrs of break in) but something happened. At a certain moderate to high volume level (not too loud though) the amp would suddenly shut it self off. This would occur consistently at the same spot in several DVD movies. It turned out that it was at a certain high frequency (ie: the clang of a chain). It drove me crazy! I messed with everything in the system for 2 weeks...changing cables, switching speakers 1 at a time, playing the same spot in the DVD over and over... I finally realized that the C3 was causing the shutdown each time. (I suspected a bad crossover) I returned the C3 to Soliloquy who replaced it within 2 days at no charge! (Their customer service is great by the way). UNFORTUNATELY...the replacement did the same thing. I brought the C3 to a local Sound Advice store and had them hook it up to their switchable system. Turned out the the C3 worked fine at any volume on every amp EXCEPT the Pioneer Elite VSX 49TX Amp and the next one down, the VSX 47TX. It shut both of those amps down at the same spot in the CD (this time I used an ELP tune "From the Beginning" at #26)! Less expensive Pioneer Elite amps did not shut down. I ended up returning the 49TX and going with B&K Ref 30 preamp and 7270 amp. Now everything sounds great. No shutdown either. I pass this info along just in case anyone else tries to use the C3 with either of these two Pioneer amps.
Good luck. Ken
I do want to mention an experience I had with the C3 though. When I first got the 6.3s and the C3 I had a Pioneer Elite VSX 49TX Amp. Everything sounded great (especially after 500 hrs of break in) but something happened. At a certain moderate to high volume level (not too loud though) the amp would suddenly shut it self off. This would occur consistently at the same spot in several DVD movies. It turned out that it was at a certain high frequency (ie: the clang of a chain). It drove me crazy! I messed with everything in the system for 2 weeks...changing cables, switching speakers 1 at a time, playing the same spot in the DVD over and over... I finally realized that the C3 was causing the shutdown each time. (I suspected a bad crossover) I returned the C3 to Soliloquy who replaced it within 2 days at no charge! (Their customer service is great by the way). UNFORTUNATELY...the replacement did the same thing. I brought the C3 to a local Sound Advice store and had them hook it up to their switchable system. Turned out the the C3 worked fine at any volume on every amp EXCEPT the Pioneer Elite VSX 49TX Amp and the next one down, the VSX 47TX. It shut both of those amps down at the same spot in the CD (this time I used an ELP tune "From the Beginning" at #26)! Less expensive Pioneer Elite amps did not shut down. I ended up returning the 49TX and going with B&K Ref 30 preamp and 7270 amp. Now everything sounds great. No shutdown either. I pass this info along just in case anyone else tries to use the C3 with either of these two Pioneer amps.
Good luck. Ken