toolshed Posted September 19, 2015 Report Share Posted September 19, 2015 I have two 15s in a 4th orders. They are 2.4 cubes sealed and around 6.5 cubes ported. They take up way to much room. So if I cut them to a 1:1 ratio, will I loose spl or volume? Just wondering if anyone has experienced cutting a 4th down and what were results? Link to comment Share on other sites More sharing options...
moredbs Posted September 19, 2015 Report Share Posted September 19, 2015 what subs are you running? most 15s I've seen need at least 3 cubes ported and 2 sealed. you wouldn't be making much more room if thats the specs. Link to comment Share on other sites More sharing options...
Triticum Agricolam Posted September 19, 2015 Report Share Posted September 19, 2015 I have two 15s in a 4th orders. They are 2.4 cubes sealed and around 6.5 cubes ported. They take up way to much room. So if I cut them to a 1:1 ratio, will I loose spl or volume? Just wondering if anyone has experienced cutting a 4th down and what were results? Yes, if you reduce the size of the chambers you will reduce efficiency (lose SPL). Everything is a tradeoff when it comes to box design. If you aren't competing it might be worth it to build a smaller box if you only lose 2 db or so. You would never hear the difference with your ears. What kind of subs are they and what kind of vehicle are they in? Also, forget everything you have ever heard about bandpass box "ratios". "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...
toolshed Posted September 19, 2015 Author Report Share Posted September 19, 2015 American bass dx 15s in the bed of an avalanche Link to comment Share on other sites More sharing options...
Triticum Agricolam Posted September 19, 2015 Report Share Posted September 19, 2015 What amp? And do you know what the tuning frequency is of the front chamber? "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...
toolshed Posted September 19, 2015 Author Report Share Posted September 19, 2015 Running around 1000 watts per sub up to 1500 depending on voltage. Front chamber is currently tuned at 45 hz Link to comment Share on other sites More sharing options...
Triticum Agricolam Posted September 20, 2015 Report Share Posted September 20, 2015 OK, so rough estimate is if you were to cut your front chamber down from 6.5 cubes to 3.5 you will lose approximately 4 db of output. 4 db is enough to be slightly noticeable to the ear, but not enough to be a huge difference. Its up to you to decide if it's worth it or not. "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...
toolshed Posted September 20, 2015 Author Report Share Posted September 20, 2015 4 db is a lot. The boxes are 40 inches long which takes up a lot if the bed. Where could I make up a 4 db difference?... Cuz really, I would be in the same boat to just run one sub in the current box. Hmmmm. I hate sacrifice haha Link to comment Share on other sites More sharing options...
Joe X Posted September 20, 2015 Report Share Posted September 20, 2015 OP you can add displacement (anything solid that takes up space) to the front chamber to reduce it's net volume to whatever you want and then retune, that way you will know what to expect from a smaller front chamber before you actually build the new box. Also playing with tuning and optimizing port area could help you regain some output. If you are not too much of a fan of 4th order BP sound you could even try a ported design, that could get pretty loud on much less space. Link to comment Share on other sites More sharing options...
toolshed Posted September 20, 2015 Author Report Share Posted September 20, 2015 I really don't care about using a 4th kr 6th or ported or wherever, I'm about as loud as possible ha-ha. Link to comment Share on other sites More sharing options...
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