Building a new box

[ATLien]

Hey guys,

I am in the process of building my first box and I think I'm gonna need a little help.

I'd like to build a ported double-baffle box like Steve did a while back but I'm having a little trouble figuring out how to get it tuned right.

Link to Steve's build.

My question is: Which calculator would you use to tune the port? I can't find one for this style of box.

I'm gonna post some pics of my build so far but I'm warning you...this is a fuckin trainwreck.

Looks like a goddamn coffin. LOL

For future reference:

Subwoofers: (2) 12" Rockford Fosgate Punch HX2

Details:

* dual 4-ohm voice coils

* CONsealer gasket hides mounting screws and prevents air leaks around the frame

* frequency response 26-200 Hz

* power range 150-500 watts RMS (250 watts per voice coil)

* peak power 1,000 watts

* sensitivity 88 dB SPL

* top mount depth 5-13/16"

* sealed box volume 0.8-4.0 cubic feet

* ported box volume 1.75-4.0 cubic feet

Recommended Ported Box Volume: The ported box volume range recommended by Rockford Fosgate is 1.75 cu/ft to 4.0 cu/ft. Within this range, the ideal size recommended by Rockford Fosgate is 2.0 cu/ft, so this is the enclosure recommended by Crutchfield. One 4" diameter x 10-3/4" long port, tuned at 35Hz, should be used with a 2.0 cu/ft enclosure.

Amplifier: Boss Chaos Extreme CX950

# Chaos Exxtreme Series 2-Channel Class AB Car Amplifier

# RMS Power Rating:

* 4 ohms: 300 watts x 2 chan.

# Max power output: 1000 watts x 2 chan.

# Pulse width modulated (PWM) MOSFET power supply

# Wired remote bass level control included

# LED power and protection indicators

# Tuned Bass EQ (0-18 dB bass boost)

# Input voltage sensitivity selector

# Bridgeable operation

# Speaker-level inputs

# Variable gain control

# Thermal and short circuit protection circuitry

# Soft power-on/off

# Anodized aluminum heatsink

# Chrome-plated RCA level inputs

# Chrome-plated screw terminals

# Fixed high-pass filter (200 Hz)

# Variable low-pass filter (35-160 Hz)

# Frequency response: 9-50000 Hz

# Dimensions: 11-7/8"L x 16-13/16"W x 2-5/8"H

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Alright guys, Please help a brotha out. This is ridiculous.

[ATLien]

Edited March 5, 2010 by ATLien

[ATLien]

Update:

How does port area and everything look?

I know I'm a total noob but an opinion from a knowledgeable member would be nice.

[ATLien]

51 views and not a single reply. Damn, how hard is it to get a little advise around here?

[k3n12ock]

Nice box so far. I'd help but I have no idea how those calculations work either.

[tlee2]

what do you need help with?

[BulletInjection]

Ill say that the box huge for 2 12's. I would say 3ft^3 but you got 6. My box for 4 12's is 6.56ft^3

[jmitch]

according to my calc i got the same freq as u so yes if u want 32.9 hz ure right on the money. and if u got a table saw add sum 45 in the corners it'll help also!!

[cthedinger]

i would say look into getting another amp like a sundow saz 1000 or sae 1200 or possibly an aq 1200

[r00k]

I swear that door on it's side keeps screwin with me!!

Edited March 6, 2010 by r00k