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  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'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!
  3. 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.
  4. In Finland we have this thing called: reilu meininki. Abusing 8x12" with one 1.10000 GZ amp.
  5. I'm trying to figure out how many cubes and what to tune each side of a 6th order bandpass for a single sundown zv4 15 and how many sqin's the ports should be. It's a d2 rev2 and will be ran on a shark 3500.1 amp. Its going in the extended cab of my 2004 f150. I want it musical and loud lol. Any help would be greatly appreciated!! I new to building bandpass boxes and I could really use the help. Thanks!!
  6. Hey guys, Im looking for your opinions on my next build. I plan on doing either two 12s at around 1500 rms with subs and port firing into the cabin sealed off from the trunk or a 4th order (3:1)at around 500 rms with a single 12 and port firing into the cabin. -Ported just over 3 ft3 around 35 htz -4th order around 5 ft3 around 50 htz Car- 2010 Civic Coupe Looking for something that really hits the lows and gets loud. Thanks, look forward to seeing some of your ideas.
  7. Hello, I just want to introduce you build for my friend. It consists of: 2x Sundown X15 2x Crescendo BC3500D 1x Crescendo Concerto C1100.4 1x ARC audio 4ch (dont know the exact model) 4x Crescendo PWX 10 4x Crescendo FT1 Tweeters 1x Powercell 4000 battery in front (we do the 3 big upgrades of course ) 2x CZ audio 115Ah batteries in back 2x Exide AGM 50Ah in the back - running on stock 120Ah alternator - Pionner 2DIN radio The sundown´s are in 6th Bandpass enclosure (4th was planned and builded but it wasnt what we want so we upgrade it to 6th ) tuned from 18hz running on two bridget Crescendo BC 3500D (metered over 5kW and 0,85ohm+ impedance in bridge - 0,425ohm on each amp) Some scores (metered on the front window) 147db @ 20hz driver window opened 150,4db @ 30hz sealed 154db @ 30hz driver window opened Here are more pics from build: https://www.facebook.com/miqra/media_set?set=a.10206386572810730.1073741861.1460274342&type=3 And here some youtube videos: https://www.youtube.com/watch?v=0cwWGOAvA8g https://www.youtube.com/watch?v=O4JODrZ6Y2I
  8. Greetings all, I recently purchased a 1970 El Camino that I would like to install a SQ system in. There really isn't a lot of room behind the seat so I am contemplating something like a bandpass box ported down through the smuggler's box from the bed into the cab. Every time I have listenned to band pass boxes in the past, they did not have a flat response. Is it even possible to get a flat response out of one? I don't want to have to adjust my output with an eq more than just minor tweaks. I am planning on running a RF t2500 to either 12" or 15" subs(pair) and a T1000-4 to the rest of the system when done. This should have more than enough power for good headroom when listening at realistic volume levels. Anyways, Thanks in advance for any help.
  9. Hello everyone! This is my very first build in car audio. I've been dreaming of my own system for a very long time now and since i can finally afford it I've started right away, I'm 17, a senior in highschool, and i own a 1997 Mustang GT. I know i am not the best at documenting what I've been doing but please give me your opinions. Constructive criticism would be great for anything i do in the future, but this build is far from finished!
  10. So I didn't know where to drop this topic so here it is... But im wanting to build a blowthrough in my 05' impala. I cant seem to get this figured out right. ive built sealed boxes but never ventured into this type. I got all my base numbers and all but lack the computer programs to make sure its all gonna be where I want. I just got three kickers cvr 10's. if anyone is willing to help id really appreciate it. I can post all the numbers I can work with.
  11. been awhile since i posted last, so here goes.. system run down 99 explorer sport 4.0 4x4 1 0ga power run to the back big 3 done in 0ga 1000ca battery up front optima yellow top in back grounds are to chassis with 0ga wire 2- brz1700.1 amps running 1 ohm per amp 2- soundqubed hds315 dual 2ohm 8cf box with a small octoport ( free box to start out with ) pionner avh280bt head unit pac lc-1 bass knob we did a 147.1db and clamped at 711rms per amp at 43hz. we did that on stock 95amp alt and since then installed a H/O 250amp. by ear seems a little louder, clamped it and is at 768rms at 14.5v on rear battery so gained a little.. have skyhigh 2/0 coming to replace the 0ga power run, hoping to get more voltage to the rear and up the rms again, will see come next weekend.. our delema is horrible box rise i was told so we are not getting close to rated from our amps. did a clamp test at .5ohm and got 646rms. have the plans and cut sheet for a spec box for these subs but am wondering a box change/ more port area could help the box rise and gain us rms? we are just starting out on the audio scene.. we have plans on building a 4th order b pillar wall and am curious on something. we could do a 4 hds315 4th order with our current amps. friend said it should be louder because of more cone area, or do a 2 hds315 4th order with a cab1600.1 or ta1.3000d amp at .5ohm.. curious on thoughts as we are doing our 2nd comp oct 1st.. and we are aiming for a 150. so spec ported box on more power, 4th with 2 subs on more power, or 4 15s in a 4th with our current amps and see how it goes..
  12. so ive built alot of nice boxes but never got into the 4th and 6th order stuff, and i want to, i just got a good deal on a mint 12" alpine type x and i wanna experiment with it... can someone help me learn how to design 4th and 6th order boxes. or kinda show me how its done and then i can learn by doing it. more or less how tuning goes and how box size effect it all pictures are always helpful, and links thanks
  13. Hello all, been a while since I have posted here. I have been out of the audio world for a few years, but I picked up a 4th order box off facebook recently that was built specifically for my 2001 Chevy Tahoe. Got it with all the trim pieces for $150.. I couldn't pass it up. I have attached a few photos if anyone is curious to see what it looks like, they arent the best but you'll get the idea. I have tried searching this forum and google but couldn't find any real specific answers. I am trying to figure out what subs would work best in a 4th order application, I have found that High Qts and low Fs is what I am looking for, but I do not know any specific numbers as far as whats considered to be a "high" Qts number or a "low" Fs number that I should be trying to stay within. Also, any other major factors to consider aside from recommended enclosure size? I am trying to keep this (sort of) a budget build and looking to spend around $100 per sub and have the subs on around 3-4k rms total. I was thinking I would go with the D2 HDS2 15s by Soundqubed as they are $104 a piece. Is this a decent sub for a 4th order application? Fs is 28.93 and Qts is .572. I am not set on this sub, and am currently searching through local facebook groups daily for some used subwoofer options. I know box volume can also play a factor in deciding subs, I dont have the exact dimensions currently but can get them if needed. I have no issue determining the box volume and reading whats recommended for the subwoofer as far as box volume goes. Mainly the Qts and Fs is my concern. Any suggestions would be greatly appreciated, Thank you!
  14. ok, to start i want to reiterate that is for an SQL build, i have a car for SPL already. i have a 2005 Jeep Grand Cherokee with a stock set up besides the HU so its time to upgrade now that its getting nice outside. the "PLANNED" set up as i have no bought anything yet.... FRONT set up: (per door) 6" dayton RS150-4 http://www.parts-express.com/dayton-audio-rs150-4-6-reference-woofer-4-ohm--295-372 Air Motion Tweeter http://www.parts-express.com/dayton-audio-amt-mini-8-air-motion-transformer-tweeter-8-ohm--275-095 3500hz 2way passive cross http://www.parts-express.com/dayton-audio-xo2w-35k-2-way-speaker-crossover-3500-hz--260-146 Sub stage: SINGLE 12" sub http://www.parts-express.com/dayton-audio-um12-22-12-ultimax-dvc-subwoofer-2-ohms-per-coil--295-512 AMPS.... either 1xAlpine PDX-F4 100rmsx4 http://www.alpine-usa.com/product/view/pdx-f4/ 1xAlpine PDX-M6 600rmsx1 http://www.alpine-usa.com/product/view/pdx-f6 OR a single 5 channel amp 1x Alpine PDX-V9 500rmsx1, 100rmsx4 http://www.alpine-usa.com/product/view/pdx-v9 im concerned that with a 5 channel amp the SQL and power will suffer when bass hits. but that 5ch from alpine is perfect specs the box im looking for is a box that is probably a T-Line with a flatter response. i have 44" wide and upto 30" deep, would like to keep the box 14" tall or under. port and sub both facing back Im VERY open to changes or modifications. i have a stock alt (95A) and batt, but i will be swapping the hood batt for the largest xs power that will fit to make sure i have 0 voltage drop
  15. Hi guys, last week i´ve seen a wall looking like this: I´ve never seen this kind of box before. Anyone knows how this kind of box is working and how you can influence the tuning of the box?
  16. So i recently got a pair of the new sundown E8 v.3 subs, dual 2 ohm. I've been messin around on winisdpro and i've come up with a parallel tuned 6th order for these babies with the objective of higher efficiency at higher freq over a conventional low tuned ported box. These woofers also appear to be highly oriented for ported enclosures according to the EBP so i assume they wont do too bad in a 6th order. *I'm curious to see what other more experienced bandpass experts have to say about my design in terms of its port placement, cu ft ratio, port area, whether its COMPLETELY WRONG BRO!!#!, ect. *I don't care for responses like "ur gonna blow ur shit up" and "fuck 6th orders" by people who must have been abused by 6th orders in their early childhood, im curious about sixth orders and i wanna start somewhere so don't even bother brocephalopod. *really just lookin for new knowledge and advice on 6th orders with 8 inch woofers which seem to be quite rare. -------------------here's teh data: - front chamber is .53 cu ft tuned to 66 hz w/ 16 sq in port area - rear chamber is 1.49 cu ft tuned to 36 hz w/ 24 sq in port area - subs will be inside rear chamber firing into front chamber - ports are facing opposite directions, if looking straight on at woofers, rear chamber port opens left, front chamber port opens right. (donno if this matters, i just didn't want the two ports directly next to each other so i put em on opposite ends) heres a link to my sketch up download: http://sketchup.google.com/3dwarehouse/details?mid=5bcfd206989351a721e84b8eebc8573c the gain in winisdpro showed as following from 30-80 hz 5 hz interval with a 25hz butterworth infrasonic filter and 100hz butterworth lowpass filter enabled: 30 (-8.1db) 35 (-.52db) 40 (1.2db) 45 (1.7db) 50 (2.4db) 55 (3.2db) 60 (3.6db) 65 (3.3db) 70 (2.4db) 75 (.89db) 80 (-.9db) tks
  17. Decided to make a seperate thread for this build as it does not really have anything to do with my current big build here: http://www.stevemeadedesigns.com/board/topic/159860-the-roadmonster-wagon-build-6th-order-bandpass-success/ here are the posts from that thread: 6th Order Bandpass Enclosure for Alpine Type R 12 So, for my first side project! I recently aquired an Alpine Type R 12 very cheap. Came in an OBCON vented box. Decided to have some fun with it. I've always wanted to try a 6th order, and this is the perfect time since I'm waiting for the good stuff. At first I was planning on building an ABC box but decided to give a 6th order a chance (can always convert it to an abc later.) My goal is to get good response from 20hz to 60hz+. According to winisd, this box design should meet those requirements. Here is the response graph compared to a standard 40hz ported box: This is the fun part. The cone excursion graph is the fun part. 1000watts and keeping control down to 22hz! Quick sketchup. Model not finished, but it gives you an idea of the layout. Wood is cut and ready, I'll be working on assembling it tonight. 2 4" precision ports per side, externally mounted. Rear chamber ports will be around 33" long and front chamber will be around 15"
  18. hey guys, im looking for some of the best box designers you know of to design me a flat wall for 4 18s. thanks!
  19. So I have been trying to calculate my first 4th order for 2 orion hcca 10s. I have started with having a seperate sealed chamber for each sub with 0.625 cuft each and a common ported chamber of 2.5 cuft tuned to 45hz. I was just wondering how much port area I would need? Also if the airspace would be fine? Also I went for a 2:1 ratio since that was pretty common, what would be the advantage of going to a bigger ratio like a 3:1? Ive heard these subs like smaller enclosures so I didnt want to get to big. Thanks!
  20. hey guys, im wondering how to determine the tuning of a sealed section of a 4th order. i know sealed boxes dont ecactly have a "tuning" but ive heard they have an Fs. so in a 4th order, how do you get one to play really low? like below 20hz. ive also heard its good to tune the ported section to the sealed sections Fs. ive had a good amount of experiance with 4th orders so im just seeing how much of this is true. im wanting to convert my current 6th order wall into a 4th order for 3-4 FI SP4 18s and want it to play down to 20hz or lower. is there a formula for determining the Fs (tuning) of a sealed section of a 4th order? thanks for any input!
  21. Sorry guys moved this post over to the subwoofers / enclosures section
  22. so im running a 6th order with (2) DC XL M2 18's and its a 1:3 ratio, it sounds good and the rear chamber is tuned at 26hz at 12 cubes. The front is around 37 cubes tuned at 47-48hz and I have one question, it hits lows like a champ, I can easily play below 20hz. BUT it seems like there isn't any SPL really. but there is one catch, I only have (1) AQ2200 at .7ohms on decent electrical, so each sub is seeing about 800-900rms or so, but it does seem as if they create the high notes, but they aren't loud. does this sound like a tuning or power issue? or could it be something else? any input will be greatly appreciated!
  23. Hey guys. I was wondering if anyone knows and can explain the fundamentals of designing a parallel tuned 6th order. I have a solid understanding of how to design series tuned 6th orders but I feel the same principles used to design a series tuned 6th may not translate to designing a parallel tuned 6th. I did some researching and came across some information but nothing solid enough to begin creating a design so I figured I would ask here. The design is going to be for a 15" dual 2 ohm Fi SSD, ran in series seeing 1,000 rms. I have 10 + cubic feet of room to work with. The enclosure will be going behind the seats of a hatchback, firing towards the trunk, unloading off the rear of the car. The design I came up with for the series tuned 6th is 4 cubes @ 28 Hz and 6 cubes @ 56 Hz. My output goals are more focused on low end output, more so than getting as loud as possible, while still keeping this a daily set up. I wasn't sure if a parallel tuned 6th may help me better reach my output goals since the lower chamber would be firing into the car rather than inside the enclosure. Information I am unsure of with designing a parallel tuned 6th is how much port area I should go with for each chamber, how large (or small) I should make each chamber and what tunings I should (or could) use. I know with a series tuned 6th its ideal to keep tuning one octave apart. Not sure on the parallel designs. All things possible I'd like to effectively cover 26-28 Hz to ~60 Hz, but I know enclosures are all about trade off so I'm willing to sacrifice here or there to meet specific goals. Thanks guys, any help is appreciated.
  24. What's up guys? I bought a 99 ford f-350 powerstroke long bed dually over the weekend and I am ready to get my install going. I have never built a 4th order before so any help is appreciated. The equipment will be (6) obsidian audio 18's running on a crecendo 3500 for now. The subs will be in the bed of the truck with the port in the back window. Basically like John Hone's truck build. What I am planning now is having the subs firing up. Would there be any issues with this as opposed to firing forward? Also, What ratio would you recommend since I have all the airspace I need. With the tuning, I was thinking around 48 hz but I really want to be able to hit the low lows so I'm not sure what would be ideal. One last question, with the 4th orders, what is the ideal port area per sq ft? would 16 in be fine? Like I said, any help is appreciated as this is my first bandpass. And I will for sure post build logs! Edit: Forgot to mention, There will be a camper shell that is sealed of course.
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