Speaker recommendation


I've been away from this forum for some time so forgive me if this thread is redundant. Simply, I need more bass response from my kit. I am running a Belles Hot Rod 150A and Rogue 99 Mag thru PSB Silvers. I like the overall sound but have been wanting more base. I tried shi-shi cables...nothing appreciable to warrant the cost. I swapped out different combinations of 6sn7s, including gt's and bad boys, vt 231s including TS round plates and metal base, and 5692 red base. The sonic differences were notable but the bottom I was looking for was elusive.
Frustrated, I bought a Definitive sub that more than delivers. At about 18" cubed, it takes up room that I now need. I want to get rid of the sub and upgrade to a speaker that delivers it all without amphitheater size and the need of a second mortgage. I'll listen to all suggestions. Thanks in advance for you advice, humor and criticism.
axspike
MSRP for the new C1 MKII is $7500 and $8500 for the signatures plus stands. Original preowned C1's typically get around $4000 depending on finish and stands.
Do you have acoustic treatments, i.e., absorbers and diffusers? Including ceiling?
No I don't. The room is not a dedicated audio room. It's a generic Den/TV room that needs to be multi-purpose for all.
That's far too much money for me. New is out; maybe used. It looks like selling the PSBs will hardly make a dent.
This effort is to try an get some living space back that's being used by 2 subs. I better come clean on this. I've got my regular audio system, mentioned above, but also in the same room is a Denon 2809 receiver, 5 Mirage nanosats and 1 Mirage nanosat matched sub. Let's see...7 speakers and 2 subs in a 13.5 square rm. I listen to alot more music than I watch TV so I have priorities. Anyway, is there a way to rid myself of 1 of these subs? Can I power the Denon thru the Definitive as well as the Rogue? If I can do that, I've gained some space.