Originally Posted by whitrzac
It should be tuned to ~26-27hz
Most people around here aim for 15hz or at least 20hz; why so high?
Cars have like 40db of room-gain below 100hz, but room-gain in a house starts at like 25hz. So expect it to be 40db quieter.
So expect the sub to sound very weak-sauce compared to in a trunk of a car; especially true if the floor is cement at ground level.
In a home it's all about displacement, it is not uncommon to see 4 18's with 10kW on dual 30amp breakers being used for a mid-sized HT because of the lack of room-gain and/or the 10-20hz requirement.
4 18's and 10kW sounds like a lot for a car, but that wouldn't even place you in the top 30 DIY AVS HT systems unfortunately.
Me personally I run 20 subs and 35,000watts (and I still want MORE BASS...) You can never have too much bass it seems.
The physics of houses, suck.