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Found 6 results

  1. *************[Note: Since photobucket decided to nerf everyone's accounts, a lot of the pictures in this thread are gone. I intend to fix all of the posts but it will take quite a while. Photos start on page 29 currently. In the meantime all of the photos are available on Facebook by searching #projectflexington and many are on Instagram under the same hashtag. Thanks for looking and please don't be afraid to comment! ]************* So figure it is time to start a build log for my 6th order wall. Been working on it for a few weeks now. I'll start by posting the equipment I'm using for the build. Electrical: Batteries: 2 nsb170fts and 2 stinger group 31s: 3 banks of super caps: 2 singer 320amp alternators (these came with the truck, I'm currently in the process of redoing the bracket to strengthen it and add a tensioner but I'll elaborate later): 4+ spools of skyhigh 1/0, knukonceptz 4/0 ofc for alternators (will post pictures later) Terminals, marine grade ring terminals lugs, properly crimped with double wall adhesive lined heat shrink: Subs are 2 sundown x15s rev 1(will be rebuilding for level 6 18s at a later date): Sub Amp, kicker warhorse: Head unit and tweeters, Sony dsx-s210x and 4x Earthquake Screamers, 1.5" 150wrms per pair silk Dome tweeters with replaceable voice coils: Mid bass, 4x dayton audio 10" pa woofers, 300rms each: Mids are tbd, probably 2 8" midrange speakers. Lots of Baltic birch: If you enjoy, please comment!
  2. I was reading up on 6th order bandpass boxes and I ran across some patents. I found a lot of interesting design information in these patents, but no calculations. Whats the point you ask? To understand better how bandpass boxes function. Knowledge is power. Most of the patents have a lot of blah blah blah near the beginning of each patent since justifying the patent is first and foremost. Somewhere past halfway, each patent lists some design tips, tricks, rules, etc that are great and thats where the interesting portions begin. I recommend to have the attached pictures (at the beginning of the patent) opened on a second screen so that you can quickly reference the numbers identifying each component and its importance in each system. 4th order: https://www.google.com/patents/US2689016 Parallel tuned 6th order (Bose): https://www.google.com/patents/US4549631 Series tuned 6th order: https://www.google.com/patents/US4875546 Series and parallel-series tuned Nth order (8th and higher): https://www.google.com/patents/US7103193 Helmholtz Resonance, the concept that drives ported enclosures and all 4th, 6th, etc enclosures: https://en.wikipedia.org/wiki/Helmholtz_resonance I've been reading through these for a few days now trying to understand whats going on with these more complicated arrangements and I think some of you will benefit from the information in these patents. Enjoy.
  3. Ok , lets start with the basics Vehicle :2002 Ford Focus SE Subs : 2 Audio Technix 18" Subwoofers Intent: Do a 150 or better at 35hz at the headrest . Now for the Pics : I did some initial measurements for the entire volume I could use without a complex box. After Wood displacement I had 22 cubic feet of internal volume . After finding my measurements, i went into Google Sketchup to mock up some ideas.Until I had a final idea of what i wanted to do So before I started building I needed some much needed upgraded wiring . ( 6 25 Foot Rolls of Audiopipe 0 Gauge CCA) 4 Runs 2 Positive, 2 Grounds I fused my wires 12" from post Now I had to get a Battery bank (xs D3400 Odessey PC2150's My amps of choice : Mb Quarts ONX 1.1500 Ok time for some framing and build pics No explanations :
  4. Hey guys! I've been watching this site and reading y'all's posts for a couple years and I've finally come up with enough money, time, and knowledge to dive headfirst into my first real car audio install. Now, this "real" install may not seem like a whole lot, but given my shoestring college budget and limited funding it's pretty big for me haha. But anyway, enough chit chat, let's get right down to it: I have been planning this build for about 6 months, when I received the plans for the enclosure (early December), but I didn't have the equipment, funding, or time to do it. I FINALLY got down to business and built and installed it over the last couple days. It took about three days and ~50hrs total with a couple of my friends helping to get it all finished. The good stuff: The enclosure is a 6th order series tuned bandpass, designed for one 2007 model Rockford Fosgate P3D215 500 watt sub. The amp powering it is a Rockford Fosgate P700-1BD. The enclosure is designed for audible performance over a 25-45hz passband, with a bias towards the lower end of that (27-36hz). I gave him the majority of the back end of my jeep, up to seat level, for gross available enclosure volume and he used basically all of it. The internal volume is around 13 cubic feet! Before I had Pete design the enclosure, I sent the sub to him to extract accurate T/S parameters: Needless to say, many of the parameters vary substantially from the OEM specs. Theoretical frequency response and impedance profile at the driver's side headrest. More to come tomorrow!
  5. I've seen quite a few write-ups on 4th order ratios and what not, but am struggling to find anything on 6th orders. what would a 1:1 compared to a 2:1, 3:1, etc. ratio 6th order sound like? Thanks!
  6. I'm looking at building my first 4th order for a sundown zv4 rev2 15"d2. I have experience building custom boxes but have never built a bandpass. I'm not sure on what ratio to go with. I like lows but would really like something musical. It's going in a extended cab f150 powered by a shark [email protected] Could someone tell me how many cubes for the sealed and ported side and how many sqin my port should be and what's the best to tune it at? Any info is greatly appreciated!
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