juan777 Posted March 21, 2014 Report Share Posted March 21, 2014 All, I want to build a box for my 2 HDC4 18s and want to make sure I get it right. I already have them in my Tahoe and they get down on a Dave The Box Guy enclosure. When I reached out to Dave, I gave him dimensions that were way too small because I needed some cargo space at the time. He made me a beautiful box, 8.5cuft at 34Hz. The problem lies with the 8.5 cubes, SQ specs call for 12cubes, soI'm turning to the SMD community to help me design it. My electrical is fine, dual alt bracket with DC Power 370A solely for audio and 2 Crescendo 31 Group batteries. My Amp is a Q1-3500D.1. I really like how clean my current box sounds and the fact that it plays below 30Hz with no issues. I know SQ calls for higher tuning so I was thinking 37 Hz or maybe higher provided I can still play the low end stuff well, down to 27-28Hz. Also I'd prefer Subs UP/Port BACK. I just want to see what the 18s will do on proper airspace and higher tuning. Hopefully a few more DBs. Basically same clean sound, but louder. I am a decent carpenter so building the design will not be an issue. What I have to work with: 2005 Chevy Tahoe Width: 49in Height: 24in Depth: 27in Port Tuning: 37Hz *Please read the full post for more details* Port Type: Slot port I know there's some awesome designers here and any help is appreciated. I can provide any other details I may have left out. Juan777 The L@zy Hoe 2005 Chevy Tahoe 2,500 Watts of Highs/Mids 4 10 midrange 4 6.5 midwoofers 4 Tweeters 6 Supertweeters 2 Lithium 80AH Batteries 24K Watts 4 Custom 18s Quad alt setup Rebuilt 250amp and 3 370s Interior work by Lone Star Auto Works The Build Log Like Loud Bass? Click Here! On 12/5/2014 at 8:06 PM, juan777 said: See yall there, I'll be the drunk Mexican with aviators on. On 12/6/2014 at 10:32 PM, boom50cal said: I did see Juan LMFAO! He REALLY WAS the drunk mexican with Aviators on! Link to comment Share on other sites More sharing options...
Joe X Posted March 21, 2014 Report Share Posted March 21, 2014 So based on your specs and dimensions, clearance to the hatch 5 1/2"", amp subsonic filter to 28 Hz, good to rated power, 2x4s in the back wall 1 1/2" wooden dowel rods for top to bottom bracing, port brace can be made of standard MDF 12" x 5 1/2"- alternative 3/4" metallic all threaded port top wall locked in position with nuts: Link to comment Share on other sites More sharing options...
juan777 Posted March 21, 2014 Author Report Share Posted March 21, 2014 Thank you Joe! Can't wait till I have some time to build! The L@zy Hoe 2005 Chevy Tahoe 2,500 Watts of Highs/Mids 4 10 midrange 4 6.5 midwoofers 4 Tweeters 6 Supertweeters 2 Lithium 80AH Batteries 24K Watts 4 Custom 18s Quad alt setup Rebuilt 250amp and 3 370s Interior work by Lone Star Auto Works The Build Log Like Loud Bass? Click Here! On 12/5/2014 at 8:06 PM, juan777 said: See yall there, I'll be the drunk Mexican with aviators on. On 12/6/2014 at 10:32 PM, boom50cal said: I did see Juan LMFAO! He REALLY WAS the drunk mexican with Aviators on! Link to comment Share on other sites More sharing options...
Kranny Posted March 21, 2014 Report Share Posted March 21, 2014 you need to get another 3500 imo. those are massive woofers Link to comment Share on other sites More sharing options...
Omega5002 Posted March 21, 2014 Report Share Posted March 21, 2014 Having the single 3500 will be good for breaking them in but you will want another 3500 as AQ/SQ woofers are heavily underrated, those HDC4's are monsters, they actually want a 3500 per sub. 2003 Kia Sorento Team Subsonic LowsTeam Bassin' on a Budget2016 Rebuild Under Construction Best score: 150.2 at 40hz (3k, 2 Custom HDC3 15's) Usaci style(door open, in the kick) Link to comment Share on other sites More sharing options...
Aj11 Posted March 22, 2014 Report Share Posted March 22, 2014 i thought a lower tune was for like 28hz because the subs will act like there in a sealed box. a lower tune will have a smoother transition threw the spectrum. I'm not saying this Is correct I'm saying this Is what i heard? can some one clear this up for me? I've always heard higher tuning Is for spl 40-50hz And lower tune Is for sq 25-33hz please unconfuse me! jvc deck stinger 1800 front hc 2000 kinetic rear 2 runs of 1/0g big 3/4 ct 60.4 2 ct 1400.1 ct EXO 15 d1 lots of deadner type r comps front stage 6 kicker tweets rear stage lots of great stuff coming soon ho alt more bats ct comps for front stage more deadner sweet amp rack lots of L.E.D lights new deck (thinking 80 prs, or flip out) Link to comment Share on other sites More sharing options...
PortSideAudio Posted March 27, 2014 Report Share Posted March 27, 2014 i thought a lower tune was for like 28hz because the subs will act like there in a sealed box. a lower tune will have a smoother transition threw the spectrum. I'm not saying this Is correct I'm saying this Is what i heard? can some one clear this up for me? I've always heard higher tuning Is for spl 40-50hz And lower tune Is for sq 25-33hz please unconfuse me! When he said SQ he meant Soundqubed, in general you are right when you are talking about Sound Pressure Level (40-50hz) and Sound Quality (25-33hz). But in certain cases, like with Soundqubed, the subs actually prefer a higher tuning to get the best balance between SPL and Sound Quality. 2002 Toyota Corolla Pioneer DEH-80PRS Soundqubed Q1-2200d Soundqubed HDC3.118 Soundqubed Q4-120 Alpine SPR-60 Alpine SPR-60C Link to comment Share on other sites More sharing options...
juan777 Posted April 3, 2014 Author Report Share Posted April 3, 2014 Big thanks to Joe X for the very detailed design. Built and playing, gets just as low as before and moves at least 20-30% more air!!! The L@zy Hoe 2005 Chevy Tahoe 2,500 Watts of Highs/Mids 4 10 midrange 4 6.5 midwoofers 4 Tweeters 6 Supertweeters 2 Lithium 80AH Batteries 24K Watts 4 Custom 18s Quad alt setup Rebuilt 250amp and 3 370s Interior work by Lone Star Auto Works The Build Log Like Loud Bass? Click Here! On 12/5/2014 at 8:06 PM, juan777 said: See yall there, I'll be the drunk Mexican with aviators on. On 12/6/2014 at 10:32 PM, boom50cal said: I did see Juan LMFAO! He REALLY WAS the drunk mexican with Aviators on! Link to comment Share on other sites More sharing options...
Joe X Posted April 4, 2014 Report Share Posted April 4, 2014 Happy that it went well for you Juan. Link to comment Share on other sites More sharing options...
jarrius Posted April 4, 2014 Report Share Posted April 4, 2014 Pic now lol 2012 Chevy sonic1xSQ HDC3 12 D2RF R1200d 140 square foot of Q-Mat(soon to be installed) 140.2Db sealed on the dash with TL 142 DB sealed on the dash with another meter (was dead on with the TL at a show i was at) 141 on music. strangeduck,on 02 Jan 2014 - 01:39 AM, said: when my car spins out i just put the car in neutral, turn in the direction i want to go and pucker my asshole Link to comment Share on other sites More sharing options...
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