Another box build: 3.8cu ft tuned 36Hz

XclusiveAutosports · 08-21-07, 10:45 PM

as title states another box build for 2 Memphis audio PW12DV4. box is 3.8 cubic ft3 tuned to 36Hz.

legendvr · 08-22-07, 12:51 AM

How did you tune it?

bl420 · 08-22-07, 01:53 AM

by calculations of port length and area. according to box volume and desired tuning frequency

GreekPower · 08-22-07, 01:59 AM

you tune as you build it in a sense. mines 8.95 cubes holding my 12's and tuned in a sealed box so no actual tune

jk this is a JOKE

bl420 · 08-22-07, 02:56 AM

btw nice work...
i love slot ports. i made one as my previous box but decided it was too heavy

probably gonna go aero ports before winter comes

XclusiveAutosports · 08-22-07, 12:11 PM

yeah it actually sounds pretty nice. guy i did the box for got the subs 2 for 100.00 so you cant beat it for the price.

i like smalled sealed boxes myself but just depends on what type of bass you want...

whyteLegend · 08-22-07, 01:37 PM

Nice work...
I made one a few weeks ago ..
4.0 cu ft tuned 33Hz for a 15" kicker

legendvr · 08-23-07, 08:35 PM

Quote:

Originally Posted by bl420

by calculations of port length and area. according to box volume and desired tuning frequency

Calculations will only get you so far. It's a first order approximation, so to say.

bl420 · 08-23-07, 09:50 PM

Quote:

Originally Posted by legendvr

Calculations will only get you so far. It's a first order approximation, so to say.

are you a moron or do you just like to disagree with everything that i say?

you sir tell me how to figure out port tuning then since you're so smart.

thats just a simple calculator
http://www.carstereo.com/help2/Articles.cfm?id=31

if you want to see formulas go search for them yourself.

but according to you no one needs calculations just guess everything.

G2BMC · 08-23-07, 11:40 PM

Quote:

Originally Posted by bl420

are you a moron or do you just like to disagree with everything that i say?

you sir tell me how to figure out port tuning then since you're so smart.

thats just a simple calculator
http://www.carstereo.com/help2/Articles.cfm?id=31

if you want to see formulas go search for them yourself.

but according to you no one needs calculations just guess everything.

YEAH!!!!

Nah for real tell me 2. Cause I dont know poo about tuning

Sgt Pyroman · 09-04-07, 04:48 PM

Sorry to play the devil's advocate, but if you all really want to get into it...

That enclosure is nice and all, but every decent bass enclosure builder should know not to share port/vent airspace. If one sub fails for whatever reason, then it will greatly compromise the other sub's performance.

Each sub should be with its own port/vent. Not to mention it is also a good idea to put triangle braces when homebuilding an enclosure.

Here's a read for everyone interested:
http://www.kicker.com/06/tech-suppor...ManualV2_1.pdf
(Requires Adobe Reader to open)
For those wanting to skim, skip right to page eleven to get to vented enclosures. For those actually wanting to pursue enclosure building, I suggest reading the whole manual, as you will learn some of the best techniques in the enclosure-building industry from this article.

Even if you don't like Kicker, you should still stop and think why they are one of the top competition winners in the world, and why they would spend the time and effort to produce a technical manual for enclosures. The enclosure makes or breaks the overall result. Put a good subwoofer in a poorly made enclosure and it will sound like any other average system. Put a cheap subwoofer in a well-built, mathematically correct enclosure and it will sound like a million bucks. Put a good subwoofer in a correctly-built enclosure and, well, you get the idea.

~ Spencer

XclusiveAutosports · 09-04-07, 10:28 PM

You can play devil's advocate and I respect everyone opinion even if I do disagree.

1. If one sub fails, go buy another one. Thats not very hard to do at all.
2. Braces are a good thought but to me it would have been overkill. This particularbox was for 2 12's with a max of 500 watts for both subs combined. (no need for braces at all because using 3/4in mdf for a box with 500 watts is not going to flex at all) If I'm building a box for pure spl and some heavy power will be used, then i will compensate for braces and add them to the design when necessary.
3. Car audio is about imagination and creativity. Some like the same basic ported or sealed box covered in grey carpet. Unfortunately I like to be a little different and add some simple but different twist so my boxes aren't like everyone else.

In car audio, the beauty of it is that everyone has their own opinions and what best works for them. I respect all opinions even if I don't agree, but I'm always willing to listen!

Thanks,

pwnt by pat · 09-04-07, 11:41 PM

looks like your port is really really close to the back wall.

08-21-07, 10:45 PM	#1 (permalink)
XclusiveAutosports Acura-holiks Join Date: Dec 2005 Location: Cashville, Tenn-a-Key Posts: 452 Car 1: 1992 Acura Legend Coupe iTrader: (1)	Another box build: 3.8cu ft tuned 36Hz as title states another box build for 2 Memphis audio PW12DV4. box is 3.8 cubic ft3 tuned to 36Hz. __________________ I BUILD SPEAKER ENCLOSURES....pm me Refs: Volkracing, No1VolsFan, L3GKang Prev Builds http://acura-legend.com/vbulletin/sh...d.php?t=101463 http://acura-legend.com/vbulletin/sh...d.php?t=101462 http://www.acura-legend.com/vbulleti...24#post1112024 My Progress Thread & Pics of My Coupe http://www.acura-legend.com/vbulleti...-coupe-124913/

08-22-07, 01:53 AM	#3 (permalink)
bl420 Dont Catch Join Date: Sep 2004 Location: Bogata, Lima Posts: 4,813 Car 1: 1991 Sedan iTrader: (16)	by calculations of port length and area. according to box volume and desired tuning frequency __________________ Anti Alpine Type-R Thread

08-22-07, 02:56 AM	#5 (permalink)
bl420 Dont Catch Join Date: Sep 2004 Location: Bogata, Lima Posts: 4,813 Car 1: 1991 Sedan iTrader: (16)	btw nice work... i love slot ports. i made one as my previous box but decided it was too heavy probably gonna go aero ports before winter comes __________________ Anti Alpine Type-R Thread

08-22-07, 12:11 PM	#6 (permalink)
XclusiveAutosports Acura-holiks Join Date: Dec 2005 Location: Cashville, Tenn-a-Key Posts: 452 Car 1: 1992 Acura Legend Coupe iTrader: (1)	yeah it actually sounds pretty nice. guy i did the box for got the subs 2 for 100.00 so you cant beat it for the price. i like smalled sealed boxes myself but just depends on what type of bass you want... __________________ I BUILD SPEAKER ENCLOSURES....pm me Refs: Volkracing, No1VolsFan, L3GKang Prev Builds http://acura-legend.com/vbulletin/sh...d.php?t=101463 http://acura-legend.com/vbulletin/sh...d.php?t=101462 http://www.acura-legend.com/vbulleti...24#post1112024 My Progress Thread & Pics of My Coupe http://www.acura-legend.com/vbulleti...-coupe-124913/

08-22-07, 01:37 PM	#7 (permalink)
whyteLegend Chicken & Dumplins Join Date: Oct 2005 Location: Upstate Posts: 3,062 iTrader: (14)	Nice work... I made one a few weeks ago .. 4.0 cu ft tuned 33Hz for a 15" kicker __________________ Click for Deep Discounts http://4450488.shopwize.com FS/Trade: JDM KA7 Headlights & Door Switch, heated seat switch 91-95 Sedan fender,3.5 RL HEADS , INTAKE MANIFOLD & FUEL RAILS , http://www.acura-legend.com/vbulleti...htside-124468/ http://www.acura-legend.com/vbulleti...ad.php?t=95844

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08-22-07, 12:51 AM	#2 (permalink)
legendvr Registered User Join Date: Apr 2007 Location: SF Bay Posts: 703 iTrader: (0)	How did you tune it?

08-22-07, 01:59 AM	#4 (permalink)
GreekPower Banned Join Date: Aug 2005 Location: Pittsburgh,PA Posts: 10,458 Car 1: 1992 Acura L"S" Sedan Car 2: 1991 3/S Turbo's 2x Car 3: 2005 Grand Prix iTrader: (13)	you tune as you build it in a sense. mines 8.95 cubes holding my 12's and tuned in a sealed box so no actual tune jk this is a JOKE

09-04-07, 04:48 PM	#11 (permalink)
Sgt Pyroman There's only one. Join Date: Mar 2006 Location: Little Rock, Arkansas, USA Posts: 156 Car 1: 1991 Acura Legend L Coupe, Black ("Charcoal Granite") on Black, with Premium Upgrade Car 2: 89 Dodge Caravan EFI iTrader: (0)	Sorry to play the devil's advocate, but if you all really want to get into it... That enclosure is nice and all, but every decent bass enclosure builder should know not to share port/vent airspace. If one sub fails for whatever reason, then it will greatly compromise the other sub's performance. Each sub should be with its own port/vent. Not to mention it is also a good idea to put triangle braces when homebuilding an enclosure. Here's a read for everyone interested: http://www.kicker.com/06/tech-suppor...ManualV2_1.pdf (Requires Adobe Reader to open) For those wanting to skim, skip right to page eleven to get to vented enclosures. For those actually wanting to pursue enclosure building, I suggest reading the whole manual, as you will learn some of the best techniques in the enclosure-building industry from this article. Even if you don't like Kicker, you should still stop and think why they are one of the top competition winners in the world, and why they would spend the time and effort to produce a technical manual for enclosures. The enclosure makes or breaks the overall result. Put a good subwoofer in a poorly made enclosure and it will sound like any other average system. Put a cheap subwoofer in a well-built, mathematically correct enclosure and it will sound like a million bucks. Put a good subwoofer in a correctly-built enclosure and, well, you get the idea. ~ Spencer __________________ 91 Legend L Coupe A/T Telion Chipped Centerline Storm 17" Wheels, BFGoodrich g-Force T/A KDW 2 225/45ZR17 Tires http://www.cardomain.com/ride/2479242 (Need to update CarDomain pics) http://www.myspace.com/sgtpyroman http://www.myspace.com/pyrotekniquesproductions http://www.carsponsorships.com/scout...or.php?id=7580

09-04-07, 10:28 PM	#12 (permalink)
XclusiveAutosports Acura-holiks Join Date: Dec 2005 Location: Cashville, Tenn-a-Key Posts: 452 Car 1: 1992 Acura Legend Coupe iTrader: (1)	You can play devil's advocate and I respect everyone opinion even if I do disagree. 1. If one sub fails, go buy another one. Thats not very hard to do at all. 2. Braces are a good thought but to me it would have been overkill. This particularbox was for 2 12's with a max of 500 watts for both subs combined. (no need for braces at all because using 3/4in mdf for a box with 500 watts is not going to flex at all) If I'm building a box for pure spl and some heavy power will be used, then i will compensate for braces and add them to the design when necessary. 3. Car audio is about imagination and creativity. Some like the same basic ported or sealed box covered in grey carpet. Unfortunately I like to be a little different and add some simple but different twist so my boxes aren't like everyone else. In car audio, the beauty of it is that everyone has their own opinions and what best works for them. I respect all opinions even if I don't agree, but I'm always willing to listen! Thanks, __________________ I BUILD SPEAKER ENCLOSURES....pm me Refs: Volkracing, No1VolsFan, L3GKang Prev Builds http://acura-legend.com/vbulletin/sh...d.php?t=101463 http://acura-legend.com/vbulletin/sh...d.php?t=101462 http://www.acura-legend.com/vbulleti...24#post1112024 My Progress Thread & Pics of My Coupe http://www.acura-legend.com/vbulleti...-coupe-124913/

09-04-07, 11:41 PM	#13 (permalink)
pwnt by pat custom box builder Join Date: Nov 2006 Location: 16066 Posts: 115 iTrader: (0)	looks like your port is really really close to the back wall.

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