Check out this link I just crossed on the net, its insane, if you scroll down to the bottom, the guy made a stainless steel horn that can hit 143 db at 45 hz which is what it is tuned at, anyways, this is crazy I thought, he also made a 15" around tube for his home theater !! check it out.
Minhembio.com - Hemma hos dac83 - Unik Biosalong i ett Skyddsrum med 4X15"

 

That is pretty insane!!

 

now THAT is a home theatre system.

 

that home theater system is ****en intense... I laughed when I saw he welded a kicker to the bottom of that, somewhat of a steel box. Would the kicker being in a steel box instead of MDF or fibre glass give a different sound? And what would be the advantages to steel over MDF??

 

the horn is ~8 foot long...
Looks good though I REALLY like it the appearance and the fact it was crafted not bought.

advantages of steel over MDF... good question... not sure it is better at all, but for folding a horn using a circular pattern a big pipe is pretty easy to work with (put a 12" pipe inside a 16" pipe, use steel studs to connect inner and outer pipes leaving a 2" gap on the top of the inner pipe, put a blank over the top (note he rounded the top to be nice to the bass wave), weld in place, and your in there, add or remove pipe to tune). The home theater system is very interesting, very much a one-of-a-kind loud *** system probably sounds very different from your standard system. The steel looks like stainless so he would then have specialized welder skills, and the entire cylinder is 'brushed' horizontally. The only real criticism on the bass horn is he should have ground down his weld

Awesome effort... this guy has access to some serious industrial stuff (perforated metal, piping, steel door, tygon tube...) I am guessing shipbuilder

 

i would be curious on what was used as a dampener material, and i would have to agree that hese probably a ship builder, pretty cool thoe !

 

that is one awseome lookin home theater for sure

 

I heard somewhere that this thing went as low as 1 hz, or something like insanily low, and it would feel like an earth quake rumble.. thats creepy as hell, could you imagine that lol. such an eerie feeling

 

Hello all The metal pipes is A Transmissionline/Quarterpipe design and can deliver 134db at 17Hz "Term-Lab" and that is a really strange feeling!... feeling youre intestans moving around swapping places!?... It has to bee felt!.... at higher levels the over 100kg TL-sub moves so mutch air that they move around to!... !! ; )) they are only working betveen 0-45Hz and then the 15" Zoomax PA spekers take over up to like 120hz The Cinema is built in a Bomb shelter with like 2m thick Concrete walls and the door is made of over 30mm Steel plate quite serius stuff i have to say !,, Best regards Drumheadz

PS: Excuse my english but i swedish you know !! ; )) S