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DIY Dual Tempest Sonotube? (1 Viewer)

JoelM

Stunt Coordinator
Joined
Dec 16, 2001
Messages
215
I have 4 tempests laying around from my old car system and would like to create 2 dual sono's for my living room. I have 2 SVS 25-31cs+'s running off a Sampson in my dedicated HT. I would like equal output although I heard that if done right then can sound like 2 Ultra's. If this is the case I'll move the SVS's to the living room. Any suggestions on volume/port size/port length. If you know of any good web pages for example/research purposes please post them.
 

Patrick Sun

Senior HTF Member
Joined
Jun 30, 1999
Messages
39,650
The main trade-off for using the Tempest is enclosure size. What's the largest you can go on either enclosure?
 

Dustin B

Senior HTF Member
Joined
Mar 10, 2001
Messages
3,126
6ft height or 6ft cubed? 6ft cubed won't cut it for dual Tempests. 6ft hieght with 24" tube will though.
 

Mike Strassburg

Second Unit
Joined
Nov 4, 2001
Messages
421
JoelM,

Here's what I recently built:

28"x54" sonotube = 480L
2 Tempests
3x3/4" MDF endcaps
2 6"x20" ports for 17Hz tune
8#'s of blanket batting for stuffing
HS500 amp 250wpc

It will hit 125+db from 25Hz on up in my 16x22 room. 2 of these would be INCREDIBLE, build it now!!! I plan to do a second one when I move to a bigger house. Good luck...Mike

P.S. These specs came straight from Dan W @ Adire.
 

JoelM

Stunt Coordinator
Joined
Dec 16, 2001
Messages
215
Mike thanks for that post!! Sometimes I need a handbook with exact measurements when doing a DIY project. To think that your pushing those babies with 250watts when they can handle 600 each. OMG I can't wait to get started.
 

Dustin B

Senior HTF Member
Joined
Mar 10, 2001
Messages
3,126
Power handling is just how much the voice coils can handle without melting. Just because a sub can take 600W doesn't mean you need to feed it anywhere near 600W to realize it's full performance.

Take for instance a 340L EBS ported Tempest. It only take 210W and a 25hz signal to get the driver to Xmax (it's linear travel limit).

In a big EBS type allignment 250W is oodles of power for a single Tempest. Feeding it more just means you can move the driver to were it will start to distort badly.
 

Mike Strassburg

Second Unit
Joined
Nov 4, 2001
Messages
421
Dustin knows of what he speaks. I would think 600 watts would be TOTAL over-kill. Large enclosures don't require a lot of power and the Tempests are a pretty efficient driver. Also don't forget that you're going to build TWO of these which I believe "should" provide a 6db increase. Hope your house can take it :D
 

JoelM

Stunt Coordinator
Joined
Dec 16, 2001
Messages
215
Thanks again. I am so used to car audio that sometimes I push things to there max. I had two JBL1200's(more like 1325watts x2)pushing the 4 and had great results. Now that I upgraded to 2 Brahma's I feel that I'm still underpowing them but I'm still reaching xmax on them. :)
 

Michael R Price

Screenwriter
Joined
Jul 22, 2001
Messages
1,591
4 Tempests? I can imagine the look on the insurance inspectors face when he sees all the cracks in your walls.

Well, good luck. I say if you already have the big amps, go for it (just watch out for bottoming in the 25-35Hz range). With 4 tempests and 600w each, you're looking at about... 128-132+ dB, I think. Just have airsickness bags ready before you start a movie.
 

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