Haterhurter Posted November 23, 2015 Report Share Posted November 23, 2015 Need help on designing a 4th order blow throu box it's a 1 15 hcca should I use the recommended sealed size for the sub with is 4cuft and go with the 2:1 ratio and what size should the port be? Link to comment Share on other sites More sharing options...
Triticum Agricolam Posted November 24, 2015 Report Share Posted November 24, 2015 Are you sure it's worth permanently disfiguring your vehicle for a single 15"? What are your goals for the system? Do you want it to sound decent or do you just want to get as loud as possible? "Nothing prevents people from knowing the truth more than the belief they already know it.""Making bass is easy, making music is the hard part."Builds: Link to comment Share on other sites More sharing options...
Joe X Posted November 24, 2015 Report Share Posted November 24, 2015 The recommended sealed size tops at 2.5 cubic feet not 4. What's your vehicle? Link to comment Share on other sites More sharing options...
Haterhurter Posted November 24, 2015 Author Report Share Posted November 24, 2015 I want it loud. But I don't want to sound bad. And it going in a 98 Chevy single cab. The recommended sealed size is 2.5? On the Orion website it says 4. Link to comment Share on other sites More sharing options...
Haterhurter Posted November 24, 2015 Author Report Share Posted November 24, 2015 And also what would be a good ratio Link to comment Share on other sites More sharing options...
Triticum Agricolam Posted November 24, 2015 Report Share Posted November 24, 2015 First off, when it comes to bandpass box design, ratios are dumb and are a flawed way to design. They are an oversimplification and they imply that making the rear chamber smaller has the same effect as making the front chamber larger and vice versa, which is completely untrue. When designing a bandpass box you size the rear chamber based on the amount of power you are going to be running and to get the sealed resonant frequency you desire (usually around 45 hz). The front chamber is then sized and tuned to get the frequency response you want. Keep in mind that with bandpass boxes, everything is a tradeoff. If you want a box that sounds decent, with a wide frequency range and smooth response, its going to cost you efficiency. A ported box will be more efficient. To get more efficient than a ported box, you are going to have to give up a lot of bandwidth. In the quest to get as loud as possible it's very easy to end up with a one-note-wonder. Exactly what model of HCCA 15 are you using? There are a couple different versions. What's your amp? "Nothing prevents people from knowing the truth more than the belief they already know it.""Making bass is easy, making music is the hard part."Builds: Link to comment Share on other sites More sharing options...
Haterhurter Posted November 24, 2015 Author Report Share Posted November 24, 2015 It's a 15.2 black face. And the amp is a DS s2b Link to comment Share on other sites More sharing options...
Haterhurter Posted November 24, 2015 Author Report Share Posted November 24, 2015 What box would be the best option for a blowthru Link to comment Share on other sites More sharing options...
Triticum Agricolam Posted November 24, 2015 Report Share Posted November 24, 2015 What box would be the best option for a blowthru I think a 4th order bandpass box will work well for what you want to do. I just wanted to make sure you had some understanding of what goes into designing a bandpass box and what consequences different design decisions have. Is this the sub you have? http://www.orioncaraudio.com/hcca-series-subwoofers-/27-hcca152-15inch-dual-2ohm.html "Nothing prevents people from knowing the truth more than the belief they already know it.""Making bass is easy, making music is the hard part."Builds: Link to comment Share on other sites More sharing options...
Haterhurter Posted November 24, 2015 Author Report Share Posted November 24, 2015 Yeah that's it Link to comment Share on other sites More sharing options...
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