With regard to carpet: do you have any down-firing subs? I have owned a few, and have experimented with them on wood floors and concrete floors, with and without carpet.
Carpet vs. hard surface under a down-firing speaker may get different results. May also be true of speakers with down-firing ports or down-firing passive radiators.
Carpet vs. hard surface under a down-firing speaker may get different results. May also be true of speakers with down-firing ports or down-firing passive radiators.