ModestDb Posted February 13, 2017 Report Share Posted February 13, 2017 Last time I came here with aero port questions and left with a vented box design by JoeX, which I built and Jesus that thing bangs! I'm currently still running that box and 2 AB VFL 8" subs in it. The thing is though...I want to try 4 AB VFL 8" subs now ? I just measured it and the box JoeX designed is (33 3/4" width X 12" height X 14" depth). Using measuring tape I have determined that the max dimensions I can work with (conservatively) are (37" width X 16" height X 27" depth). As you can see, I have lots of depth remaining to work with, so we can get my extra needed airspace from there. The problem is the width, I know. I figure on staggering the subs though. I'll upload a picture of the layout I have in mind, shortly. Once that image is uploaded, can someone map me out a 32hz or 34 hz box design, with a cut sheet list like JoeX did for me? I'd greatly appreciate it and I will log the build just like last time, with daily pictures/videos. Thanks for any help guys. 4 American Bass VFL 8" at 0.5 ohm Soundstream Tarantula 3000.1D at 0.5 ohm 32 hz ported box designed by Mark at Car Audio Fabrications XS D1200 secondary with Stinger isolator Link to comment Share on other sites More sharing options...
ModestDb Posted February 13, 2017 Author Report Share Posted February 13, 2017 4 American Bass VFL 8" at 0.5 ohm Soundstream Tarantula 3000.1D at 0.5 ohm 32 hz ported box designed by Mark at Car Audio Fabrications XS D1200 secondary with Stinger isolator Link to comment Share on other sites More sharing options...
ModestDb Posted February 13, 2017 Author Report Share Posted February 13, 2017 I just mocked up a 37 inch wide by 16 inches tall box face. I've verified that four 8 inch subs can fit upon that given space and still have room for a vent. I would really like to make this happen. 4 American Bass VFL 8" at 0.5 ohm Soundstream Tarantula 3000.1D at 0.5 ohm 32 hz ported box designed by Mark at Car Audio Fabrications XS D1200 secondary with Stinger isolator Link to comment Share on other sites More sharing options...
ModestDb Posted February 13, 2017 Author Report Share Posted February 13, 2017 57 minutes ago, ModestDb said: Last time I came here with aero port questions and left with a vented box design by JoeX, which I built and Jesus that thing bangs! I'm currently still running that box and 2 AB VFL 8" subs in it. The thing is though...I want to try 4 AB VFL 8" subs now I just measured it and the box JoeX designed is (33 3/4" width X 12" height X 14" depth). Using measuring tape I have determined that the max dimensions I can work with (conservatively) are (37" width X 16" height X 27" depth). As you can see, I have lots of depth remaining to work with, so we can get my extra needed airspace from there. The problem is the width, I know. I figure on staggering the subs though. I'll upload a picture of the layout I have in mind, shortly. Once that image is uploaded, can someone map me out a 32hz or 34 hz box design, with a cut sheet list like JoeX did for me? I'd greatly appreciate it and I will log the build just like last time, with daily pictures/videos. Thanks for any help guys. CORRECTION...15" Height is my max not 16". 4 American Bass VFL 8" at 0.5 ohm Soundstream Tarantula 3000.1D at 0.5 ohm 32 hz ported box designed by Mark at Car Audio Fabrications XS D1200 secondary with Stinger isolator Link to comment Share on other sites More sharing options...
ModestDb Posted February 14, 2017 Author Report Share Posted February 14, 2017 JoeX can't receive messages from me so, can someone mention to him to look at this thread? 4 American Bass VFL 8" at 0.5 ohm Soundstream Tarantula 3000.1D at 0.5 ohm 32 hz ported box designed by Mark at Car Audio Fabrications XS D1200 secondary with Stinger isolator Link to comment Share on other sites More sharing options...
ALDJ253 Posted February 14, 2017 Report Share Posted February 14, 2017 Edit: Sorry, missed part of your post.My original comment is invalid Link to comment Share on other sites More sharing options...
ModestDb Posted February 15, 2017 Author Report Share Posted February 15, 2017 21 hours ago, ALDJ253 said: Edit: Sorry, missed part of your post.My original comment is invalid Why, what did you say? lol. 4 American Bass VFL 8" at 0.5 ohm Soundstream Tarantula 3000.1D at 0.5 ohm 32 hz ported box designed by Mark at Car Audio Fabrications XS D1200 secondary with Stinger isolator Link to comment Share on other sites More sharing options...
ModestDb Posted February 15, 2017 Author Report Share Posted February 15, 2017 Okay I'm going to try this myself. Someone let me know if I figure anything wrong. My CURRENT box is 33.75 wide X 12 tall X 14 deep but what matters here is internal box volume. I built with 3/4" MDF so I subtract 1.5" from external measurements right? So my internal is 32.25 wide X 10.5 tall X 12.5 deep. I multiply those measurements L x W x H which is 4232.8125 and I divide that by 1728 arriving at 2.449 (round up to 2.45) cubic feet of internal space CURRENTLY. I want to keep the same amount of airspace per sub when I build a box for 4 of them. So I multiply 2.45 x 2 since I'm doubling the number of these subs, which will now be 4.9 cubic feet. Next, I know the max dimensions of my trunk allows for 37 wide x 15 tall x 27 deep. I have to subtract 1.5 from each measurement to factor for wood thickness. So 35.5 x 13.5 x ??? <---I plugged in random depth numbers since I had the most wiggle room with that dimension. I started at 14" and worked my way up until I hit 17.75". So one potential layout for my needs is 35.5 x 13.5 x 17.75 = 8506.6875 divided by 1728 brings me to 4.922 cubic feet of internal box. However...assuming that my above estimations are correct, I have no idea how to take into account the port. Someone nudge me in the right direction and I'll do the legwork myself please. Thanks. 4 American Bass VFL 8" at 0.5 ohm Soundstream Tarantula 3000.1D at 0.5 ohm 32 hz ported box designed by Mark at Car Audio Fabrications XS D1200 secondary with Stinger isolator Link to comment Share on other sites More sharing options...
ModestDb Posted February 17, 2017 Author Report Share Posted February 17, 2017 Okay so apparently I figured some things wrong, despite trying my best to not screw up. The following is according to RE Audio L-ported speaker box calculator. Box width- 37 Box height- 15 Box Top/Bottom depth both- 19.25 Wood thickness- .75 square port height- 13.5 square port width- 4 square port length 1- 14.5 square port length 2- 8 total port length 29.25 square port area 54 Box volume 3.999 Tune Frequency 32hz ____________________________________________ Here's the thing though. I question this calculator. If I plug in the measurements of my box that JoeX designed, it shows me a 1.7 cubic foot box but his calculator called it a 1.5 cubic foot box. His calls it a 34 hz box but this calculator says it's a 31hz box. There's a difference between the calculators. Anyone know what he uses for box calculations or any ideas what I may be doing wrong? 4 American Bass VFL 8" at 0.5 ohm Soundstream Tarantula 3000.1D at 0.5 ohm 32 hz ported box designed by Mark at Car Audio Fabrications XS D1200 secondary with Stinger isolator Link to comment Share on other sites More sharing options...
ModestDb Posted February 17, 2017 Author Report Share Posted February 17, 2017 Okay nevermind. I just read reviews of the RE calculator and it's not good. Moving along. I just discovered Torres. 4 American Bass VFL 8" at 0.5 ohm Soundstream Tarantula 3000.1D at 0.5 ohm 32 hz ported box designed by Mark at Car Audio Fabrications XS D1200 secondary with Stinger isolator Link to comment Share on other sites More sharing options...
Recommended Posts
Archived
This topic is now archived and is closed to further replies.