Sub Question. One higher quality sub or two lesser quality? (Rythmik vs HSU)

Thanks ozzy62, lovin' this thread.
I am considering building using Rythmik sub module and a pair of 12' in a folded dipole design.
My only response so far was that the measurement device may not be the most accurate compared to an accelerometer .. Then I considered a DSP amplifier module moving away from the Rythmik AB to class D and no servo at all. Chasing the dragon....

I'll be reading with interest. Cheers mate.

I say neither. Get a Rel subwoofer.

Get four.  Don't matter what kind.

I used to have a HSU 3 Mark lV subwoofer and I know there are better but I would buy no other . It's well made and designed , goes very low with very little distortion , has very high wattage amplifier and has all the connections necessary for any need . HSU makes great subs . Rythmik also . Rel is also recommendable .

The issue is never the quality of the sub.  The issue is always how you integrate it.