quakecitystudio Posted May 15, 2009 Report Share Posted May 15, 2009 what is your test cd? Also, are you going to slick the inside of the box, like a boat, somewhere on here someone said that they gained from making the inside of the box really smooth. Quote Bass Music Producer • Photographer • Graphic Designer -------------- Deep Sector Boom... Link to comment Share on other sites More sharing options...
sundownz Posted May 15, 2009 Author Report Share Posted May 15, 2009 what is your test cd? Also, are you going to slick the inside of the box, like a boat, somewhere on here someone said that they gained from making the inside of the box really smooth. I just use sine waves on the iPod. DB Drag has an official CD that has the same thing on it. And yes - resin work is on the to-do list. Quote - Jacob Fuller - Owner, Sundown Audio - Sundown Audio on FACEBOOK - Please DO NOT PM ME -- use my email address -- [email protected] Link to comment Share on other sites More sharing options...
sundownz Posted May 15, 2009 Author Report Share Posted May 15, 2009 Tried a few things with no success : No change - 155.6 --- LOSS - Down 0.2 to 155.4 --- This has gained me in the past... but not today, did 155.5 dB this way. --- 155.5 dB again --- So no more gains yet! Quote - Jacob Fuller - Owner, Sundown Audio - Sundown Audio on FACEBOOK - Please DO NOT PM ME -- use my email address -- [email protected] Link to comment Share on other sites More sharing options...
Torres Posted May 15, 2009 Report Share Posted May 15, 2009 i like this thread! i also read that rounding over the edges of the sub cutouts on the INSIDE of the box could help gain. i think i read that from nightshade...so you may already know that cuz he lives around there right? but either way i think that'd be good to see on the 'to do' list if it's not already there. damn i wish this thread was done already lol so i know what to do and what not to do to my box. so far the only thing i planned on doing was a 45 in front of the port opening and the terminals. i'll make sure to get some good quality ones tho. possibly resin the inside as well Quote Link to comment Share on other sites More sharing options...
bobonit Posted May 16, 2009 Report Share Posted May 16, 2009 What size threaded rod did you use? Quote 97 Maxima SE Bunch of shit going in, check out the build Build Log Link to comment Share on other sites More sharing options...
sundownz Posted May 16, 2009 Author Report Share Posted May 16, 2009 5/16" Rod - fits quite well into those Stinger ring terminals. Quote - Jacob Fuller - Owner, Sundown Audio - Sundown Audio on FACEBOOK - Please DO NOT PM ME -- use my email address -- [email protected] Link to comment Share on other sites More sharing options...
sundownz Posted May 19, 2009 Author Report Share Posted May 19, 2009 Woops - I made a mistake earlier... must have looked at the wrong data for the subs I was using before. They are 3.0 DCR and not 3.5 DCR as I was assuming before. With those D4 coils all in parallel I had 0.375 DCR per amp, which is more like a 0.5 ohm nominal load. With the D1 Nightshades I built I have an actual 0.50 DCR load per amp, which is more like 0.70 ohms nominal. Even still... it is doing 154.3 dB with a DCR much higher. I may have to wire the amps down lower and try it that way with these coils. Or use a different amp configuration like four 1500Ds wired down to 0.25 DCR each to get a better comparison. Quote - Jacob Fuller - Owner, Sundown Audio - Sundown Audio on FACEBOOK - Please DO NOT PM ME -- use my email address -- [email protected] Link to comment Share on other sites More sharing options...
sundownz Posted May 19, 2009 Author Report Share Posted May 19, 2009 So far the 1500s aren't much liking the 0.25 load. I can roll it and get a score but not high enough to do a GOOD score. So I may just need to wait for 3500s and use the 0.5 DCR load for now and then build some other subs later once I get it all dialed it for the 0.375 DCR load again. Quote - Jacob Fuller - Owner, Sundown Audio - Sundown Audio on FACEBOOK - Please DO NOT PM ME -- use my email address -- [email protected] Link to comment Share on other sites More sharing options...
testtones Posted May 19, 2009 Report Share Posted May 19, 2009 what if you were to try and run a 45 or radius from the bottom of your port up to the hatch? I'm not sure but it may lower your tuning a bit though Quote Link to comment Share on other sites More sharing options...
oldschool Posted May 27, 2009 Report Share Posted May 27, 2009 Just an fyi for everybody I tried the pvc at the ends of the ports and lost .5 db also tried a 45 at backside of the port and lost an additional .1 which goes to show you every install will have different results. Quote TEAM GROUNDPOUNDERS INC. 156.5 OUT THE TRUNK OF A 95 CADDY W/1 SUB & 2AMPs score done on a termlab mic in the kick on the dash sealed was 154 Link to comment Share on other sites More sharing options...
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