Rick J B Posted September 20, 2014 Share Posted September 20, 2014 Awesome thread! But uh, where does one buy K402's? Klipsch or ? Quote Link to comment Share on other sites More sharing options...
Heritage_Head Posted September 20, 2014 Share Posted September 20, 2014 (edited) Couldn't you build it so each 15 is sealed in its own cab. Make them half the volume of the 904 and you would only need half the ports. That way you have all the sizes done. It would still be one big cab though. Edited September 20, 2014 by reference_head Quote Link to comment Share on other sites More sharing options...
Turbox Posted September 20, 2014 Author Share Posted September 20, 2014 Internal volume of the following length is 79.5 inches- the horn legth is 39.5 inches exacly, I've added 20 inches on each side of the horn to accommodate the woofers. depth is 21 inches - Horn depth with the driver is about 20 inches, I've left a small cushion height 28 inches - the horn width is 25.5 inches, I've left a little extra for some wood for strength in the from motorboard. Also the woofer is 15.25 inches, and the 510 horn height is 9 inches. total of 24.5 total volume = 46746 inches cubed. Quote Link to comment Share on other sites More sharing options...
Turbox Posted September 20, 2014 Author Share Posted September 20, 2014 Couldn't you build it so each 15 is sealed in its own cab. Make them half the volume of the 904 and you would only need half the ports. That way you have all the sizes done. It would still be one big cab though. I thought about sealing off each woofer inside the cabinet as well, with half the volume yes. Does the calculation remain the same for ports? So half the volume and use two ports with the same length of vent piping? I don't think it does, I think its more complicated than that... Quote Link to comment Share on other sites More sharing options...
Moderators dtel Posted September 20, 2014 Moderators Share Posted September 20, 2014 Turbox, on 20 Sept 2014 - 1:28 PM, said: Use a 402 in a centre channel? Sorry just seen this Yes a 402 in a center but without it being another Jub, a center that can keep up without sacrificing sound built as a real center speaker. Quote Link to comment Share on other sites More sharing options...
Turbox Posted September 20, 2014 Author Share Posted September 20, 2014 Yeah, my problem is that I know what I need(yeah right...a need), but there is nothing around that will fit my space and needs...thus a custom build. Quote Link to comment Share on other sites More sharing options...
Turbox Posted September 20, 2014 Author Share Posted September 20, 2014 Awesome thread! But uh, where does one buy K402's? Klipsch or ? I bought mine from American Cinema Equipment. ask for Spencer Chao. 1 Quote Link to comment Share on other sites More sharing options...
mustang guy Posted September 21, 2014 Share Posted September 21, 2014 Internal volume of the following length is 79.5 inches- the horn legth is 39.5 inches exacly, I've added 20 inches on each side of the horn to accommodate the woofers. depth is 21 inches - Horn depth with the driver is about 20 inches, I've left a small cushion height 28 inches - the horn width is 25.5 inches, I've left a little extra for some wood for strength in the from motorboard. Also the woofer is 15.25 inches, and the 510 horn height is 9 inches. total of 24.5 total volume = 46746 inches cubed. Is that the internal volume or the external volume of the cabinet? The internal volume of a 904 is right at about 15,600 cu in by the way... Quote Link to comment Share on other sites More sharing options...
bhendrix Posted September 21, 2014 Share Posted September 21, 2014 (edited) I can't imagine what kind of lobing, comb filtering, and polars one might encounter with some of the exotic combinations with woofers 4' apart. I would think the best sound would come from the simplest combination that would closely match the Jubs. With my Jubs, at Roy's recommendation, I use a LaScala bass cab with a 402 on top, but I have an AT screen. A LaScala bass cab is 24.5" tall. The 510 horn is 9" tall. Total height 33.5" With thoughtful planning on a DIY, you could probably get the total height of the LS bass cab with 510 on top down to about down to about 32.5". The DE75 driver is the secret. KISS Edited September 21, 2014 by bhendrix Quote Link to comment Share on other sites More sharing options...
Turbox Posted September 21, 2014 Author Share Posted September 21, 2014 Fair enough, and good point. I'd like to find a way to incorporate the 402 for sure. I also though about a Belle bottom as well. If I remember correctly the Belle might have a lower profile than the La Scala? Quote Link to comment Share on other sites More sharing options...
Turbox Posted September 21, 2014 Author Share Posted September 21, 2014 Internal volume of the following total volume = 46746 inches cubed. Is that the internal volume or the external volume of the cabinet? The internal volume of a 904 is right at about 15,600 cu in by the way... Yes internal volume. Quote Link to comment Share on other sites More sharing options...
mustang guy Posted September 21, 2014 Share Posted September 21, 2014 (edited) I can't imagine what kind of lobing, comb filtering, and polars one might encounter with some of the exotic combinations with woofers 4' apart. I would think the best sound would come from the simplest combination that would closely match the Jubs. With my Jubs, at Roy's recommendation, I use a LaScala bass cab with a 402 on top, but I have an AT screen. A LaScala bass cab is 24.5" tall. The 510 horn is 9" tall. Total height 33.5" With thoughtful planning on a DIY, you could probably get the total height of the LS bass cab with 510 on top down to about down to about 32.5". The DE75 driver is the secret. KISS What about introducing a phase shift introduced between the two woofers? That should alleviate the comb filtering, shouldn't it? If using electronic crossovers, each woofer would get it's own channel. That way, he could use the design above. One could also reverse the polarity of the two woofers to make them exactly 180 degrees out. Internal volume of the following total volume = 46746 inches cubed. Is that the internal volume or the external volume of the cabinet? The internal volume of a 904 is right at about 15,600 cu in by the way... Yes internal volume. If I am correct, you should be able to use the same ports cut to 1/3 of their original length. 46,746/15,600=3 Edited September 21, 2014 by mustang guy Quote Link to comment Share on other sites More sharing options...
Turbox Posted September 23, 2014 Author Share Posted September 23, 2014 So I've frankenstein'd together a different centre channel for now. La Scala bottom, 402, and a 510 three way. Sounds good, just not sure how I can build something with a clean look. Quote Link to comment Share on other sites More sharing options...
mustang guy Posted September 24, 2014 Share Posted September 24, 2014 (edited) How about this: And a grille cover for the whole shebang... Edited September 24, 2014 by mustang guy 1 Quote Link to comment Share on other sites More sharing options...
Turbox Posted September 24, 2014 Author Share Posted September 24, 2014 question, what effect would increasing the height of the la scala bin have on the sound? keeping all of the other dimensions except height. Quote Link to comment Share on other sites More sharing options...
mustang guy Posted September 24, 2014 Share Posted September 24, 2014 It is my opinion that it would flatten the response, but there would be no gain. Does that sound right Claude? Quote Link to comment Share on other sites More sharing options...
Chris A Posted March 4, 2016 Share Posted March 4, 2016 Consider this approach: https://community.klipsch.com/index.php?/topic/161404-a-k-402-based-full-range-multiple-entry-horn/ Two 15" Crites cast frame woofers. I'd recommend an digital crossover to do the EQ. This is time-aligned and coaxial (i.e., all drivers are within 1/4 wavelength at their crossover frequency), and when EQed can extend downwards to below 30 Hz. The sound is spectacular. If you absolutely have to have 3-way, then I'd recommend a BMS 4592ND compression driver instead of a K-69-A: http://www.bmsspeakers.com/index.php?id=bms_4592nd Chris Quote Link to comment Share on other sites More sharing options...
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