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DIY Dual Tempest Sonotube?

Discussion in 'Archived Threads 2001-2004' started by JoelM, Jun 8, 2002.

  1. JoelM

    JoelM Stunt Coordinator

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    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.
     
  2. Patrick Sun

    Patrick Sun Studio Mogul

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    The main trade-off for using the Tempest is enclosure size. What's the largest you can go on either enclosure?
     
  3. JoelM

    JoelM Stunt Coordinator

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    6 ft maximum
     
  4. Dustin B

    Dustin B Producer

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    6ft height or 6ft cubed? 6ft cubed won't cut it for dual Tempests. 6ft hieght with 24" tube will though.
     
  5. Mike Strassburg

    Mike Strassburg Second Unit

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    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.
     
  6. JoelM

    JoelM Stunt Coordinator

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    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.
     
  7. Dustin B

    Dustin B Producer

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    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.
     
  8. Mike Strassburg

    Mike Strassburg Second Unit

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    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 [​IMG]
     
  9. JoelM

    JoelM Stunt Coordinator

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    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. [​IMG]
     
  10. Michael R Price

    Michael R Price Screenwriter

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    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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