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What's the biggest sound from smallest box?

post #1 of 20
Thread Starter 
As I'm wrapping up my fridge-sized 15" sub build, I'm wondering what is the biggest sound from the smallest enclosure that you can buy or build?

For example, I have the Logitech z3 computer speaker. That' the little sub-that-could! I really can't believe how much bass it puts out with corner loading. And it's only a 4" driver with an 8" passive radiator.
post #2 of 20
Quote:
Originally Posted by Subjga View Post

I really can't believe how much bass it puts out with corner loading. And it's only a 4" driver with an 8" passive radiator.

Don't believe what you think you hear. What your ears are interpreting as bass is actually an octave higher, midbass. The laws of physics, Hoffman's Iron Law for one, are non-negotiable.
post #3 of 20
Quote:
Originally Posted by Subjga View Post

As I'm wrapping up my fridge-sized 15" sub build, I'm wondering what is the biggest sound from the smallest enclosure that you can buy or build?

Small sealed enclosure with capable high excursion driver(s) and gobs of amp power.
post #4 of 20
JL 10W7AE-3 in a 12"x12"x18" sealed box powered by a QSC 5050 bridged, EQ'd by a Balanced MiniDSP...Done !
post #5 of 20
I've got 2 pairs of TC Sounds Epic 10's dual opposed in a 14.5" x 14.5" x 18" enclosures. After Linkwitz Transform via MiniDSP and before room gain and boundary reinforcement, Unibox shows each pair provides 104.5 db SPL at 20 hz when touching xmax at 13 hz w/o an HPF. I'm using themtight against the wall near corners, which should give me at least another 9 db, + 6db for the 2nd pair. Haven't pushed it that high yet; the walls shake satisfyingly at much lower levels!
post #6 of 20
Maybe this???

Tornado Siren






dbl
post #7 of 20
Seriously - If you are trying to conceal the large sub boxes, maybe look into an IB setup.


dbl
post #8 of 20
Thread Starter 
Quote:
Originally Posted by kgveteran View Post

JL 10W7AE-3 in a 12"x12"x18" sealed box powered by a QSC 5050 bridged, EQ'd by a Balanced MiniDSP...Done !

Very specific - excellent!

Why is it so hard to find the specs and T/S numbers for this sub?
post #9 of 20
Thread Starter 
Quote:
Originally Posted by JackNC View Post

I've got 2 pairs of TC Sounds Epic 10's dual opposed in a 14.5" x 14.5" x 18" enclosures. After Linkwitz Transform via MiniDSP and before room gain and boundary reinforcement, Unibox shows each pair provides 104.5 db SPL at 20 hz when touching xmax at 13 hz w/o an HPF. I'm using themtight against the wall near corners, which should give me at least another 9 db, + 6db for the 2nd pair. Haven't pushed it that high yet; the walls shake satisfyingly at much lower levels!

Can you post pics of these? Sounds very interesting.
post #10 of 20
RSS390HO-15 work well in a 50l enclosure.
post #11 of 20
Quote:
Originally Posted by Bigus View Post

Small sealed enclosure with capable high excursion driver(s) and gobs of amp power.

Depends on bandwidth expected, though.

If one is willing to limit low-end bandwidth to, say 15-20Hz, then the answer is a small passive radiator enclosure with capable high excursion driver(s) and gobs of amp power.
post #12 of 20
A box with the tympani LAT driver probably...
post #13 of 20
Tymphany LAT 700 subwoofer driver to be specific
post #14 of 20
I must have done something wrong. I modelled the LAT 700 in unibox. It need a huge, 276L box for QTC=.7 and then hit xmax at 35 hz, producing only "112"db. That might be a big sound (despite needing an HPF at 35 hz to protect the woofer) but its not a small box!
post #15 of 20
If you aren't trying to go below 30hz you can do pretty well with a tiny PR box. A Dayton RSS315HO in 1ft3 with a NS390-PR can take full power from an EP4000 with the 30hz HPF engaged, without even breaking a sweat. That actually sounds kind of appealing to have a tiny pair of subs like that wreak somebody's expectations
post #16 of 20
Quote:
Originally Posted by Subjga View Post

Can you post pics of these? Sounds very interesting.

Thanks for asking I have a few build shots but none showing a finished product because I've yet to veneer it. In the one picture, its sitting on 18" tiles and has a 12" sonotube sitting on top - a quick and dirty enclosure for a used/legacy JBL2214H mid woofer I picked up on Ebay.

In the contest for most punch per cubic foot, the Epic 10 does well because it only needs .42 cu.ft. of Vbox, has huge extension (22mm Xmax, 31 mm Xmech) and can take more than 500W w/o exceeding Xmax.

Jack
LL
LL
post #17 of 20
Quote:
Originally Posted by DS-21 View Post


Depends on bandwidth expected, though.

If one is willing to limit low-end bandwidth to, say 15-20Hz, then the answer is a small passive radiator enclosure with capable high excursion driver(s) and gobs of amp power.

True enough but for most drivers I think the cutoff would be a bit higher with a "tiny" enclosure.

Then again, you can always just put two drivers in the same enclosure you had the driver and pr in and have the same spl capability above the pr knee and much more below. All you need is even more gobs of amp power. At some point not melting the vc becomes the nagging limit I guess.
post #18 of 20
"If one is willing to limit low-end bandwidth to, say 15-20Hz, then the answer is a small passive radiator enclosure with capable high excursion driver(s) and gobs of amp power."

lms-r 12" driver
1.2 cubic foot enclosure
2 x 12" vmp passive radiators with 900 grams added, 1500 grams for the less efficient lower tune (2nd pic)
3500 watts in first, 3000 watts in second gets the driver to xmax in theory

this is similar to the old 'earthquake' sub, but much more capable than that one.
LL
LL
post #19 of 20
Here is a graph comparing the TC Sounds family members on more or less an even footing in the small sealed paradigm. QTCs are all in the .6 to .7 range. Note that the dual Epic10 edges out the LMS-R12 but that 4 Epic 10's fall 2 db short of a single LMSR-Ultra in the same total box volume. Note also that the LMS-R12 costs $369 while I got my Epic10's on sale for $139 each.
LL
post #20 of 20
Not really related

http://www.roland.com/products/en/CUBE-80XL/

But damn those things crank out some serious sound for such a small size.
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