Thanks BDP I'll check out the Rythmik site.
I think what I may try is to continue with the REL to augment the lower frequencies of my PSB mains, using the high level speaker connection but no LFE connect. Then use the new sub, such as SVS SB13 for LFE effects. I think my Integra can handle this type of setup, if I can't get the two subs to integrate good enough, I may then spring for a second sealed sub.
I think what I may try is to continue with the REL to augment the lower frequencies of my PSB mains, using the high level speaker connection but no LFE connect. Then use the new sub, such as SVS SB13 for LFE effects. I think my Integra can handle this type of setup, if I can't get the two subs to integrate good enough, I may then spring for a second sealed sub.