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Sealed... 20-50Hz, LOUD?
Sealed... 20-50Hz, LOUD?
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Old 12th February 2018, 01:52 PM   #21
manninen is offline manninen  Finland
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Quote:
Originally Posted by mark100 View Post
Thanks for comments everyone..

Yeah, I totally get the "impracticality" of sealed for PA down to 20Hz, and what that would mean in terms of box and amp count.

I really just like trying stuff

I'm thinking the safest way to try this is get 4 more bms 18n862, to go with the 4 I have, and make 8 sealed boxes.
Put Linkwitz Transforms on them , and see how it works.

They are 1500 W AES 8 ohms. I've got 15K into 4 without bridging, 20K with bridging, so I think all good on amps.
All I'm really out, besides 4 drivers which I can use no matter, is the time and $ to build 6 more sealed cabs....which w/o paint and handles etc is prob 2 days and about $300.

So 4 more drivers for about $2K is the big nut...
I figure odds are I'll end up with the 8 BR cabs I know that works...
but after at least hearing what a pile of sealed can do, and having a nice bonfire of sealed boxes
862 is quite easy driver to live with, could be fun to hear lets say 30pc 862īs in wall of bass
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Old 12th February 2018, 01:57 PM   #22
Zwiller is offline Zwiller  United States
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Originally Posted by chris661 View Post
PS - have you heard of AVS Forums? 8x 18"s in a house is a starter kit to those guys.
LOL. Those guys will encourage you but not us here. No disrespect at all. I think they would tell you to go IB.
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Old 12th February 2018, 02:48 PM   #23
18Hurts is offline 18Hurts  United States
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Using the piston calculator and assuming cutting the Xmax results in half because of the ported alignment...

I get 16 subs that the AVS'ers use, the $100 Dayton Audio PA460 in a slightly larger than 6 cu. ft. box ported to 20Hz and using the dynamic EQ from iNukes. They call it the VBSS sub and it should weigh around 100 pounds, when used in multiples, has the go power and when overdriven to around 11mm of Xmax, will go low. Sure, you'll need 16 of them outside but they are moveable, inexpensive and do perform--in multiples.

Figure 16 of them, 16 sheets of plywood and two iNuke 3000 DSPs would give you 130dB at 1 meter outside. The amps will run $550, the woofers around $1,500 and flaired ports around $250 or so. Chicks dig big, black subwoofer boxes made into walls... go for it!
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Old 12th February 2018, 02:58 PM   #24
Brian Steele is online now Brian Steele  Grenada
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Quote:
Originally Posted by 18Hurts View Post
Figure 16 of them, 16 sheets of plywood and two iNuke 3000 DSPs would give you 130dB at 1 meter outside. The amps will run $550, the woofers around $1,500 and flaired ports around $250 or so. Chicks dig big, black subwoofer boxes made into walls... go for it!
You could go with shelf vents for the additional bracing that they provide and save yourself $250.....
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Old 12th February 2018, 06:01 PM   #25
mark100 is offline mark100  United States
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Quote:
Originally Posted by Brian Steele View Post
You could go with shelf vents for the additional bracing that they provide and save yourself $250.....
Another round of thanks for comments guys !

Brian, what do you mean by shelf vents ? Never heard that term before...

Chris, I know nothing about dipole bass....will investigate...

Sonce, wife had to go, to make room for big boxes

all the rest...thanks for the ideas and for the 'go for it'
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Old 12th February 2018, 06:12 PM   #26
DPH is online now DPH  United States
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Additionally, is this asking the question before or after room gain is accounted for? Or whatsoever is left of the edifice after 135 dB @ 20 Hz?
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Old 12th February 2018, 06:29 PM   #27
Zwiller is offline Zwiller  United States
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Quote:
Originally Posted by 18Hurts View Post
Chicks dig big, black subwoofer boxes made into walls... go for it!
Some guy near me has a system and it is I similar to the talk of this thread. I think 16 18s sealed all setup together. It is nicknamed the sound bar. Kinda cool.
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Old 12th February 2018, 06:38 PM   #28
scottjoplin is offline scottjoplin  Wales
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Quote:
Originally Posted by mark100 View Post
Chris, I know nothing about dipole bass....will investigate...
He was talking about open baffle. However, there are sealed forms of dipole speakers and this is an interesting variant DP_woofer_room
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Old 13th February 2018, 01:32 PM   #29
MemX is offline MemX  United Kingdom
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Originally Posted by scottjoplin View Post
I like the very low stuff that you get on some good live recordings where you can hear/sense the room breathing
+1!
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Old 14th February 2018, 01:36 PM   #30
mashaffer is offline mashaffer  United States
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If you don' want to do TL you might try 4 of these and EQ to suit.

Dayton Audio RSS390HF-4 15" Reference HF Subwoofer 4 Ohm
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