Subwoofer for music, how low?

The key to your question was music. Everyone chimed in about "most" music hitting 20hz. Some does. Rel is a coupled sub. In other words your floor is the bottom of the slot on that type of sub. The best way to make that type of sub work is, mass load the box and literally glue it to the floor. You will feel THAT type of sub.

The question is, do you want to feel the sub through your bottom (the whole house) or hear and feel the sub in your seated position? NOT through your BUTT or FEET or the plaster falling off the ceiling or the plates rattling in the kitchen, BUT only at your listening position?

If the sub requires coupling to work, you might want to think if that is the type of "BASS" you want. Some love it. The drunker I get, the more I like it, no doubt about it. The only issue is, I quit drinking 40 years ago..:-)

Regards

@oldhvymec This makes sense.

What sub would you recommend?

T/9x is terrific sub, I have the T/9i Red Gloss, would love to add a second...I use a pair of S/5 SHO in main system...

DEBRA isn’t very expensive. James R. No idea on the shipping. I thought some of the parts were from Parts Express, like the amps. They have pretty good shipping rates too. Flat packs, there are a few sources, some better than others. PE is one.

How much material does it take to make 4 1cf boxes? Under a 4 x 8 sheet of 3/4" Hardwood, Plywood, HDF or MDF. Chip board will work fine for subs.. They don’t have to be pretty.

You can add a Mohawk to your subs.. :-)

Let me hunt up some parts I would and ARE using. 

Regards

4 10" 44-10s. This is my personal favorite sub of all time. This will hit what EVER  you want, no problem.

I use Behringer NU12000s and a DCX2696. The DCX has 6 outlets for 6 different setting or you can use a 4 module model like a NU4-6000. So we are clear in 2cf boxes and with a 12" passive radiator they will hit below 20hz direct coupled. Excellent cone control. Super bang for the buck.. 4 will pressure a room VERY easy. Thats 4 active 10" and 4 passive 12". ALL are considered medium to high high excursion drivers, for LOW distortion. I've used them for a long time. 5 years ago they would come up on sale for 99.00. NOW 199.00. Worth every penny. I've never had a failure with that driver..

I use it in my car too.. Impressive, IB in the car though, NO port ot passive.. 

One of the best speakers for columns I've ever used too. 16hz 1000 watts columns under 5% distortion. That's VERY low..

Remember DECOUPLE and build to decouple, Air, springs, pods, BUT decouple.. NO spikes for music, EVER. Spikes are for SNOW.. LOL If you do put any driver pointing down, you have to enclose the slot. You have to add a butt plate. Otherwise it has to be on the side or top (not the best but not bad with a single driver).

Regards