EdgarC6789 Posted December 31, 2014 Report Share Posted December 31, 2014 (edited) Helllo Im new to the forum and hopefully someone can help me out on this Long story short I bought 2 brand new subs and good wires and paid for a custom box.. etc.. and I dont feel its as loud Before this I had 2 L7s wired down to 1 ohm in a 6 cube box tuned to 32hz and it seem almost the same..(in a car)I have 1996 2 door tahoe2 Sundown X-15s D4 wired to 1 ohm on a Sundown 2500.1 Clarion Eq Kenwood kvt 512 indash and Knuconcepts 0/4 Gauge OFC wire I grounded the ground to the bolt of the back seats(sanded it and cleaned the area)under 12" 0 gauge I have 1 yellow optima and a stock alternator( 0 gauge wire from alt to battery & bat ground to chassis.. Yes im missing one more for the big 3 but I dont know where )im guessing the box is too small? port to small? or my weak alternator?[/url]The height from top to bottom counting the tripple baffle is 17"I tried to give all the details so someone can help me out on this Edited December 31, 2014 by EdgarC6789 Quote Link to comment Share on other sites More sharing options...
Titan Audio Posted January 3, 2015 Report Share Posted January 3, 2015 (edited) It seems you have a lot of air space and port. 4.4 cubes per sub and 100 inches of port is definitely on the higher side of what I've seen X-15's in. Where maybe the more educated posters might be able to help out is with two ports I would assume the tuning stays the same but the port area doubles which would leave you with a tune of 23 Hz which I'm sure everyone would agree is very low. I've got a single X-15 D2 on a sundown 2500 in a box (3.5ish net cubes with about 60 inches of port) that is close to the specs that sundown suggests and it works pretty good for a single sub in a crew cab truck. As far as the electrical, the one step you're missing from the big 3 is a ground wire from the alternator case to the ground point on the chassis. A bigger alternator would certainly be useful, I can't imagine that you have more than a 100 amps left for the stereo with the stock alt and a 2500 should need a lot more than that. My 2500 has no problem taking everything my stock 150 alt has and still pull 2 - 35 series agm batteries down into the low 10 volt range temporarily. Hopefully people will start responding soon. It seems some posts take off here and some don't. EDIT - Forgot that this was posted in the sundown forum. You might want to copy paste your original post into a new post in the subwoofer and enclosure section. You'll probably have much larger audience over there to answer questions. Edited January 3, 2015 by Titan Audio Quote Link to comment Share on other sites More sharing options...
sfbsnyder Posted February 5, 2015 Report Share Posted February 5, 2015 You need some bigger wire!!! That 4 guage ofc is only rated for like 150A... and i like to run a ground from alternator case to battery negative... skip grounding through the engine to many variables... ground is just as important as power Quote Link to comment Share on other sites More sharing options...
Gmansontos Posted February 10, 2015 Report Share Posted February 10, 2015 I bought these two subs as well I'm trying to get some information about a box. Except I'm going to be running them on a S a Z 3500 Quote Link to comment Share on other sites More sharing options...
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