awesome sub indeed. not for giant rooms (400sq feet or so: you would need 3-4 HRS12)
tight bass not muddy, super strong woofer.
make careful test of placement, phase adjustement
if seating position is middle of the room (a null zone), then place the subs on each lateral mid wall slightly pointing at you.
if your room is quare, 200ft, and sitting position at rear wall: place the HRS in front of you, 20-60cm from front mid wall.
it's stick with the HRS12, 12'' : area of woofer matters a lot.
if you can afford: get 3-5 in line in front of you
(if you sit close to rear wall)
put resonators in corners also !! valid for all types of subs. suck the bass from the corners so it fills the holes in the listening area
sitting close to a wall puts you also in a bass pressure zone.
but again absorb bass; resonators. like here www.jocaviacoustics.com