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Old 23rd September 2011, 01:18 AM   #1
justint is offline justint  United States
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Join Date: Jan 2010
Location: wisconsin
Default need help reaching 140db in my house!!!!

ok i just can't get enough bass.. Currently I am running 2 3015LF boxes from my last build which gets me about 129db from a meter away playing normal music.

I WANT 140DB.. I was looking at the BASSMAXX trip box idea as I have no issues with space.. 25x25 ft. living room with 20ft. ceilings..

I have a QSC 2450 for an amp.. Someone tell me if with this amp can I hit 140 db down to 40hz and maybe 135+ at 35hz..

Tell me what to build and buy.. I want to have to screw in the pictures on the wall.. Thanks for the help!!
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Old 23rd September 2011, 01:23 AM   #2
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You'll probably have to screw in some plywood over your windows too, after you blow the glass out.
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Old 23rd September 2011, 01:24 AM   #3
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I don't have a huge amount of experience with subs or very high SPLs, but from the sound of things you're best bet is probably using some very large 18-21" pro drivers, or alternatively building a bass horn or two. It's good that you're only aiming for 35-40hz too because that is actually a realistic goal I'd have thought.

Edit - can your mains actually keep up with this requirement? Or are you only after the insane SPL requirement in the bass? I hope this is only a goal you wish to achieve rather then regularly use otherwise you'll soon find yourself suffering from hearing loss.
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Old 23rd September 2011, 01:27 AM   #4
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lets see, you want another 12db.

You could run 6 more 3015's and need some more amps.
That will get you there.

norman
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Old 23rd September 2011, 01:27 AM   #5
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Take what you have and multiply it by 8 and you will come up 1db short of your goal!

jer
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Old 23rd September 2011, 01:35 AM   #6
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Try a jet engine at ten meters.

The Straight Dope: Can a noise be loud enough to kill you?

Most impressive I ever experienced was from a rare set of Klipsh LaSals (sp?) driven with a real 80W RMS. Base drum thumps felt like shock of high powered rifle going off next to you on a rifle range. These were some sort of high end Klipsh speakers intended for use at large concerts. Never seen or heard of a set since. I recall them being like six feet wide and five feet tall... but that's just a guess.
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Old 23rd September 2011, 01:38 AM   #7
justint is offline justint  United States
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i cannot have 8 TH boxes lined up across the living room.. anyone see this BASSMAXX X3 Trip box.. its only 4ft. x4ft. x 2ft.. and says it can hit 141 continuously.. any idea how to make something like this?? and yes my high's are the eon 15's which are good enuf for my living room not worried about excessive quality like in my theatre room.
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Old 23rd September 2011, 01:47 AM   #8
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3 X 12" woofers with gobs of excursion.
Sure it could be done with the right drivers!


jer
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Old 23rd September 2011, 02:11 AM   #9
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You will need to displace 121,372 cubic centimeters of air to get 140db at 25hz.
And you will need 60,686 cubic centimeters of air for 140db at 35hz.
As well as 30,343 cubic centimeters of air for 140db at 50hz.

That should give you some idea of what it would take to reach such levels !!!

jer
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Old 23rd September 2011, 02:20 AM   #10
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Join Date: Feb 2008
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Thats,

7,406.57ci for 25hz or 4.29 cu.ft.
3,714.39ci for 35hz or 2.15 cu.ft.
1,851.64ci for 50hz or 1.07 cu.ft.

for a monopole speaker,
mileage may vary!!!

jer
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