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    04tahoe's Avatar
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    Need box design for 2 alpine type r's

    I'm in desperate need of a box design for 2 alpine swr-12d4 in a 04 Tahoe. Running alpine mrx-m240 at 1500 rms. Port back for sure not sure if sub's back or up is better option. I listen to mostly rap, rock, and some dubstep.

    Sub specs:

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    Alpine Type-R SWR-12D4
    3000W Peak 12" Type-R Series Dual 4-ohm High Performance Subwoofer
    4.6
    88 reviews
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    Dual 4-Ohm Dual 2-Ohm

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    Description
    • 1000 Watts RMS
    • 3000 Watts Max
    • Reinforced parabolic cone structure
    • Durable High Amplitude Multi-Roll santoprene surround
    • Cast aluminum frame with integral shorting sleeve
    • High-grade strontium ferrite segmented magnet assembly
    • Integrated 8 AWG push terminals with VC jumpers
    Read Full Description
    Features & Specs
    Subwoofer Specifications
    Subwoofer SeriesType-R (Alpine)
    Subwoofer Size12"
    Peak Power Handling3000 watts
    RMS Power Handling1000 watts
    Voice Coil(s)Dual
    Impedance (Per Voice Coil)4 ohms
    Voice Coil Diameter2.6"
    Frequency Response24 - 200 Hz
    Sensitivity84.9 dB
    Xmax (millimeters)20 mm
    Subwoofer DesignRound / Circle
    Main Cone ColorDark Gray
    Woofer CompositionKevlar Fiber
    Woofer SurroundSantoprene Rubber
    Subwoofer GrilleOptional (Accessory required and sold separately)
    Alpine KTE-12G
    Re-Cone Kit AvailableNo
    Recommended Enclosure Specifications
    Recommended Enclosure TypePorted / Vented
    Sealed
    Minimum Sealed Box Volume0.55 cubic feet
    Maximum Sealed Box Volume1.00 cubic feet
    Minimum Ported Box Volume1.0 cubic feet
    Maximum Ported Box Volume1.50 cubic feet
    Top-Mount Depth6-3/8"
    Cutout Diameter10-7/8"
    Shallow Mount InstallationNo
    Electromechanical Parameters
    Free-Air Resonance (Fs)28 Hz
    Equivalent Compliance (Vas)46 liters
    Total Speaker Q Value (Qts)0.48
    Electrical Q Value (Qes)0.52
    Electrical Resistance of Voice Coil (Re)3.8 ohms
    Mechanical Q Value (Qms)6.04


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    Re: Need box design for 2 alpine type r's

    Also wanting slot port

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    Re: Need box design for 2 alpine type r's

    Come on somebody help me out. I work in a body shop so tools and ability to build aren't an issue just don't have access to computer just my phone right now. Im not sure about how to get my ft³ with the port factored in im probably overthinking it but i just want to build the perfect home for these two in my tahoe

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    Re: Need box design for 2 alpine type r's

    Recommended is 1.38ft³ net volume

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    Re: Need box design for 2 alpine type r's

    Quote Originally Posted by 04tahoe View Post
    Come on somebody help me out. I work in a body shop so tools and ability to build aren't an issue just don't have access to computer just my phone right now. Im not sure about how to get my ft³ with the port factored in im probably overthinking it but i just want to build the perfect home for these two in my tahoe

    Sent from my SM-S975L using Tapatalk
    search up torres box calculator

    enter in your max dimensions and experiment with the port along with possible displacements via bracing or subwoofer.

    Main rule for beginners is to keep port area per foot around 12-16 for slot. Round ports is 9-13



    09 Sienna Subs : Four Team Ascendant 18s......Sub amp: Two Taramps 15k
    Headunit: Pioneer 80PRS................................Mids/Highs amp: CT 500.2, ppi 600.2, ppi 900.4 bridged
    Front stage: Two PWX 10s per door midbass only....... PRV 6MR500 midrange....... Massive CT 2 german tweeters.
    320 amp Singer alt....... 1 group 34 under the hood 6 group31 agms in the back 560 amp hours total.

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    Re: Need box design for 2 alpine type r's



    How does this look? Wanting about 2.7ft³ net volume wasn't sure how to factor bracing so just set it to 2.8ft³. Any suggestions would be greatly appreciated

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    Re: Need box design for 2 alpine type r's

    That design is also meant to be sub back port back forgot to unchecked boxes

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    Re: Need box design for 2 alpine type r's

    Quote Originally Posted by 04tahoe View Post


    How does this look? Wanting about 2.7ft³ net volume wasn't sure how to factor bracing so just set it to 2.8ft³. Any suggestions would be greatly appreciated

    Sent from my SM-S975L using Tapatalk
    you'd want to almost double what you have volume wise for two 12s and I told you 12-16 port area per foot. You are at 5.33

    If it is a slot port, you need to put 3 for common port walls because thats how many wall of the box is used for the port. Displacement for two type R 12s should be closer to 0.20 not .1

    If you want it stronger, you can double baffle the box as well. which means you put 1 in "# of extra baffles"



    09 Sienna Subs : Four Team Ascendant 18s......Sub amp: Two Taramps 15k
    Headunit: Pioneer 80PRS................................Mids/Highs amp: CT 500.2, ppi 600.2, ppi 900.4 bridged
    Front stage: Two PWX 10s per door midbass only....... PRV 6MR500 midrange....... Massive CT 2 german tweeters.
    320 amp Singer alt....... 1 group 34 under the hood 6 group31 agms in the back 560 amp hours total.

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    Re: Need box design for 2 alpine type r's

    Quote Originally Posted by Jeffdachef View Post
    you'd want to almost double what you have volume wise for two 12s and I told you 12-16 port area per foot. You are at 5.33

    If it is a slot port, you need to put 3 for common port walls because thats how many wall of the box is used for the port. Displacement for two type R 12s should be closer to 0.20 not .1

    If you want it stronger, you can double baffle the box as well. which means you put 1 in "# of extra baffles"
    Ok it'll be tommorow before I can get back on the program. As far as volume recommended net volume for one is 1.38ft³ so I was just doubling that is there something I'm missing? And I see my mistake on the p.a.p.f I was looking at the wrong parameter

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    Re: Need box design for 2 alpine type r's

    Quote Originally Posted by 04tahoe View Post
    Ok it'll be tommorow before I can get back on the program. As far as volume recommended net volume for one is 1.38ft³ so I was just doubling that is there something I'm missing? And I see my mistake on the p.a.p.f I was looking at the wrong parameter

    Sent from my SM-S975L using Tapatalk
    How much power you feeding them? 1.5-2 net per works very well. I can help you out with a design and cutsheet.

    Sent from my SCH-I605 using Tapatalk



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    Re: Need box design for 2 alpine type r's

    In an SUV, your gonna want subs up, port back. Exactly like my avatar. The port back subs up theory has been a proven method which works very well.



    97 4 dr. Tahoe
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    Re: Need box design for 2 alpine type r's

    Quote Originally Posted by 04tahoe View Post
    Ok it'll be tommorow before I can get back on the program. As far as volume recommended net volume for one is 1.38ft³ so I was just doubling that is there something I'm missing? And I see my mistake on the p.a.p.f I was looking at the wrong parameter

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    Proper port area takes up box size. Your current port is 1/3 of whats needed and a bigger and longer port will eat up more than a cubic feet. Hit up CSCstang for a design. He did one for two type R 12s that got loud before in an SUV.

    Quote Originally Posted by CSCStang View Post
    How much power you feeding them? 1.5-2 net per works very well. I can help you out with a design and cutsheet.

    Sent from my SCH-I605 using Tapatalk
    1500 watts so 750 each before rise.



    09 Sienna Subs : Four Team Ascendant 18s......Sub amp: Two Taramps 15k
    Headunit: Pioneer 80PRS................................Mids/Highs amp: CT 500.2, ppi 600.2, ppi 900.4 bridged
    Front stage: Two PWX 10s per door midbass only....... PRV 6MR500 midrange....... Massive CT 2 german tweeters.
    320 amp Singer alt....... 1 group 34 under the hood 6 group31 agms in the back 560 amp hours total.

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    Re: Need box design for 2 alpine type r's

    Internal port volume and speaker displacement, will take up some internal enclosure volume. Keep that in mind as you get that enclosure deigned. Woah, that rhymes! I just simply don't have the time. I took a step backwords and stepped on a dime. Oh man I'm on fire!!



    97 4 dr. Tahoe
    Optima redtop
    Alpine 9835
    Polk Audio MM6501 coming soon...
    Soundstream Rubicon 1.2500D & 4.500 amps
    2 Sundown Audio X 15's Tuned @ 30Hz.

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    Re: Need box design for 2 alpine type r's

    Quote Originally Posted by CSCStang View Post
    How much power you feeding them? 1.5-2 net per works very well. I can help you out with a design and cutsheet.

    Sent from my SCH-I605 using Tapatalk
    Wired 4 ohm at 1500 rms. Going in a 04 Tahoe

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    Re: Need box design for 2 alpine type r's

    Quote Originally Posted by Boomin_tahoe View Post
    Internal port volume and speaker displacement, will take up some internal enclosure volume. Keep that in mind as you get that enclosure deigned. Woah, that rhymes! I just simply don't have the time. I took a step backwords and stepped on a dime. Oh man I'm on fire!!
    time for a decaf remix.



    09 Sienna Subs : Four Team Ascendant 18s......Sub amp: Two Taramps 15k
    Headunit: Pioneer 80PRS................................Mids/Highs amp: CT 500.2, ppi 600.2, ppi 900.4 bridged
    Front stage: Two PWX 10s per door midbass only....... PRV 6MR500 midrange....... Massive CT 2 german tweeters.
    320 amp Singer alt....... 1 group 34 under the hood 6 group31 agms in the back 560 amp hours total.

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