SPL & SQ / Fabrication

I'm new to this forum, so let me know if this has already been covered. I have a Carvin HD900 amp and a RLP15d2 driver and want to build an MDF enclosure. I would like to position the driver so it is downward firing and would also like to have port(s), perhaps on the rear. I would like to have a width of 20" and height isn't a concern. I think I want to tune to around 14hz (want something really low) and need to know about amounts of polyfill inside the enclosure as well as internal bracing requirements, etc. Basically the whole picture:) I'm gonna run 900w in 4ohm bridged mono mode for power (think that makes sense...lol). Please help!! Thanks!!

The Car:2000 Maxima The build i talk to some guys from americanbass usa they sending me 4 12's sq 600 rms subs im gonna need a amp to push them they have a 1000.1 they wana send me but i need to worry about the box build 1st thats where you guys come in..lol i need to build a box for 4 12;s ported threw my rear deck now on a ported enclosure these speaker need a box volume of 1.5 Cu Ft Now i Need to figure out how would i tuned this box out to 40hz thats the max the speakers can hold so i wana give it alls its got..BUT i have no clue on tuneing a box to 40 hz i can build a reg box to 12 ported slot in the middle but on the whole 4 12's i have no clue i hopeing one of ya c…

okay simple enough for the knowledgable ones, IA's 187 12" subs, port up, subs back, going with 4.5 cubes and tunning at 34hz. using 4" aero ports (4"X17") =how many, how long? the one who answers this will receive good fortune for the rest of his days! thanks chop

Hey everyone! I'm looking to replace my current set-up with something new. My amp just died today on the way home from work and so I'm in the need of a replacement. Currently I have a set of RS65.2's up front only, after pulling out the rear deck speakers. Having only a front sound stage is new to me but, after running it a few weeks, I got used to it and really enjoy it. What I'm looking for is either a new amp to power the existing set I already have (not sure how much life is left in them) or get a new amp and a set of components to match. Budget is ~500 but I wouldn't mind going a little more if I could get a nice eq in there to really dial in the system. If you need …

need some help with a box for a 98 explorer for 2 15'' crystal cmpx215 wood like it ported to 26hz r 30hz i have 41''w 18''tall 20''deep wood like to do 4'' pvc pipe let me no if you can help me out i think i have about 7.4cf i wont to do subs up and ports back i think

So Im building my box but am confused as hell. Ive read I need 12-14sq. in. of port per ^3 but the manufacturer insists on 40sq. in. x10" long @32hz. for a 6^3 net box for my 18. Its an Atomic APX. When I spoke with them they said dont listen to anybody build this exact. WTF?! Any idea why? Its rated at 5000rms. Would the larger port make it unload at low freq. with that much power and thats why they say what they say? Shouldnt it have massive port noise?! Im so confused. Someone please straighten me out on why they want it EXACTLY as they say and yet the port area doesnt make sense?

Hey, this is what i got: 1x pioneer sub ts-w3002d4 @2ohms=1000rms QCA3500D amp; 2ohm=1750watts rms enclosure: 20"x16"x13" port size: 2"x11.5" everything on my car is stock and i think my amp is putting out a little less than what is rated performance wise, i dont think that my sub is performing like it should, my excursion is nothing compared to what I see on you tube and im not sure if it is because of my enclosure. I know that I can get better power if i upgrade wiring but I think I should be getting more out of what I already have. I want to try a different box, does anyone have any suggestions on sizez and I dont know much about tuning but im not getting high end …

so i have just bought 4 ppi pcx 12'' subs and i need help building a box but im not good at all with knowing how big or long to make my port. i have a two door tahoe and i have plenty of space height 22'' width 46'' and length 37''. here are the specs each sub needs 1.25 cubic feet so 5 cubic feet all together. speaker displacement incuded is already included port diameter 2.6'' (inside) per sub port length 12'' per sub Equivalent Square Port 2.3x2.3 per sub if anyone could help that would be awesome i would also they the box to be around 30 hz's too

Whats the best way to mount an amp on a sub box and not have an issue of the vibrations messing up the internals of the amp?

Not so good with building these kind of boxes never seem to e the dims right. any ideas or designs that have actually worked. so lets here some ideas or formulas"

Do you guys think an 8" aero port would be enough port area for 2 12" zcons? They would be in about 6 cubic feet after displacements. On around 3500 rms. Tuned around 34hz. I want to go with a 10" port but an 8" would be a lot easier since I'm only going to have about 36" for the width. You think I should test it out and try or do you thinks its forsure not enough?

I have a question about ports. I am having finely decided to use round ports. But I have a problem; I have 8.89ft3 I want to tune around 38 Hz. The problem I run into is I need like 15’’ of port. The box is only 14’’ deep, going with 2 8’’ ports. So, can I bend the port with a 45? So it will make it in to the car with out a problem. If yes, do I have to add any thing to the length, or do I just cut the tube where it needs to be and add the 45 in between the cut peaces. Trunk setup subs up, port up going thought the rear deck.

The dimensions are" 20" Wide x 18" Tall x 15" Deep = 3.125 ft^3 external Internal = 2.385 ft^3 - .15 (speaker) = 2.235 ft ^3 to work with minus whatever port area??? a little area in the back lost to the plexi window that will be put in, but negligible The speaker is a Fi BL 12, with flatwind and pchamfer options. Tuning is suggested to be 32 hz and box size between 1.8-2.5 ft^3 I can't go much bigger due to trunk opening, and for that reason I am building to boxes of the same size and putting them in the trunk that way. I mainly listen to Rap/ Hip Hop and Hanna Montana ( ) These will be facing towards the seat so that the plexi rear is visible when opening the trunk. I …

alright so i think im going to be mounting my future amp to the back of a seat. is that bad? and also what material is good so the amp doesn't rattle around.

I need some tips on doing a bed cut. This guy has 3 digital design 1500 12s. I cant remember the year or model but its a dodge single cab. The diminsions i got were 15" tall, 40" wide, and around 40" deep. He has them on a kicker zx 1000.1. I just need some tips on how i should go about doing this, since i have never done one before.

I currently have my sub in a poorly designed enclosure accidently tuned to 53hz. Im going to have my dad build me a new one for my birthday. I designed one using the RE calc and came out with a "classic" L port box with the sub and port on same side, tuned to 31.5hz a 4.03 cubes. I want to have the sub facing up and the port back though because i use my trunk frequently and am paranoid about my sub. My question is how would i go about designing this? The total dimensions for the box i designed with sub and port same side are 26" W 21" H 20"D. I also was wondering how this would affect the sound and volume. Thanks alot for the help.

Sup guys, first time poster. I have a 2003 dodge dakota regular cab. I have 2 SSD 10" that I have in 2 sealed boxes behind the seat. I am looking to take one out and put 1 ported box for only one sub in. I have the box dimensions that I want just can't figure out where to put the port or how big it needs to be. I have a HiFonics 1600 mono That I am going to be wiring to the sub at 1 Ohm. The box dimension I have came up with will give me 1.25 cubic feet @33Hz. Height = 15 inches Width = 24 inches Depth = 6 inches Please help with port size and location

Where should i put the port? This is going to be in a blazer, and if back how much room should I leave between the port and tailgate?

Okay, so...I am going to start my build for two 15" fi bl's in the trunk of my 97 chysler sebring, I can not quite remember what specifications, but it will be about 7 to 8 cubic feet. I am not sure whether it would sound better with the port facing in side the cab or toward the opening of the trunk, the subs will be facing up, and about 30-32 hz. Any input would be appreciated Thank,

I am starting a new kerfed enclosure for two Pioneer ts-w3002d4 subs. I am a little unsure of how to calculate the volume of the kerfed or flared port. I have two designs so far but I am unsure of which will be the best. I am gonna do two separate boxes and attach them together. Which is better?

Just got metered on an Audio control...Did it with music. One song (The one I figured was the loudest) hit 145.0db! The song was Plies - All Black slowed by wattz305 All the other songs we tried were in the 140-143.5 range. I went in figuring I'd be happy hitting those numbers. Around 40hz seems to be the sweet spot. Still wish I had access to a termlab though.

I have a lot better success in making 1 single run with the port if i side fire rather then fire back. I prefer not to have to bend the port(s) is why i am asking if there is anything "off" sounding to this. My max square dimensions in cargo area is - (for this height) 42" wide x 12" high x 24.25" deep. If i were leave a 7" gap in the width to allow air to escape out of the box and shoot up towards the car, i would then have- 35" wide x 12" high x 24.25" deep. At the very back of the box on the side, i would, for example, have a 10.5" high x 4" wide port. I'm assuming i should have it as far back in the car as possible when side firing. If i choose to side fire, should i …

What are the pros and cons of the 2? I have a box design for my 8 12's with a slot port but i have heard aeros are solid as well? some1 shed some light on this ^^^ original design

Got a pair of MTX 8500 10"s that I am trying to sell (brand new in boxes still) but if they do not sell I am just going to use them. I am wondering what the best box style would be for a pair of these? I have pretty much unlimited space (Astro van) so that isn't an issue and they will be run on a XXX-6500D @ 2ohms so like 1500 each for burps, 700~ daily...

hey guys, i recently took out my sub and amp because i needed the sitting space. my video pretty much explains what im looking ot do. any help would be appreciated!!