I have driven my AP virgo's with a variety of amps. I found that adding power definitely increased the bass response. You can also decide to sacrifice imaging by placing them near the rear wall - that will increase the bass quite a bit.
I am driving mine with the vt100m2, alternating with pass labs aleph 2's. The vt100 actually has more powerful bass than the alephs. I formerly drove them with a mccormack dna-1 revA/Gold. That amp completely changed the virgo's personality from a good all-arounder to a bass monster. It was startling how powerful their bass was with that amp. I also drove them with a set of sonic frontiers sfm-160 160watt tube amps. Those had better bass than my vt100m2. I own a newer vt100m2 now - I think it sounds better than the old one I had.
If you go with a subwoofer, I recommend you stay with the audio physic line. I think a mismatched sub could screw up the virgo's wonderful clean bass performance. AP makes a smaller sub, the Luna, that you might want to consider.
A third choice you might want to consider is to try some el-34 tubes in your conrad johnson. My old conrad johnson 45watt mv-50 had el-34's in it. EL-34's are known for gutsy bass. It actually outperformed the vt100 when used with my magnepan 1.6QR's. No question about it. I know you can special order a premier 11 with those tubes. Call CJ.
I am driving mine with the vt100m2, alternating with pass labs aleph 2's. The vt100 actually has more powerful bass than the alephs. I formerly drove them with a mccormack dna-1 revA/Gold. That amp completely changed the virgo's personality from a good all-arounder to a bass monster. It was startling how powerful their bass was with that amp. I also drove them with a set of sonic frontiers sfm-160 160watt tube amps. Those had better bass than my vt100m2. I own a newer vt100m2 now - I think it sounds better than the old one I had.
If you go with a subwoofer, I recommend you stay with the audio physic line. I think a mismatched sub could screw up the virgo's wonderful clean bass performance. AP makes a smaller sub, the Luna, that you might want to consider.
A third choice you might want to consider is to try some el-34 tubes in your conrad johnson. My old conrad johnson 45watt mv-50 had el-34's in it. EL-34's are known for gutsy bass. It actually outperformed the vt100 when used with my magnepan 1.6QR's. No question about it. I know you can special order a premier 11 with those tubes. Call CJ.