Question about Alpine Type-R SWR-1242D Car Subwoofer

2 Answers

Wires I have 2 Alpine TR 12'' DVC SWR 1242D . I want to use A kicker kx 1200.1 1200wt RMS x 1 at 1 ohm - 600 wt Rms x at 2 ohms - 300wt Rms 1 at 4 ohms 1-ohm stable can you advise best wire diagram and also maybe some advise on box dimentions portet not ported. I want to feal the bass inmy bones

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  • Anonymous Feb 14, 2008

    i have some optimus bass tubes and i need to know how to wire them in. i got them used so i dont have directions thaks

  • mikmedlen5 Jan 13, 2009

    i have 2 mtx 1000 watt amps and 2 alpine 1500 watt speakers do i use 2 or 4 ohm,,,ty

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2 Answers

Yes i have had that same problemo but i used michelle from full houses advice and said no problemo dude. listen to the first guy hes very right

Posted on Jan 07, 2008

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  • Master
  • 709 Answers

Hi Gott Mudd,

 

I can relate to feeling it in the bones. You got the stuff to do it.  You should try the Alpine MP3 head units with bass boost, those are bad to the bone.

 

Wiring: 

 

Amp to Speaker I like to use the code VC for Voice coil, and AO for Amplifier output.  Also + for positive.  If I say VC1-, I am referring to the first connector starting left to right on the Alpine Sub. Now I have not seen a Kicker KX1200.1 amplifier.  All I see are MRA, MRP, or PDX prefix on the part numbers. So take what I am saying as a guess. You may want to revisit looking at the model of the amp to be sure your giving the right information.

 

We are going for  2 Ohms. Paralleling the two subs, not the voice coils. The voice coils will be series.  Bridge the amp if necessary to get mono channel. only using AO+ and AO- for output.

 

AO+ to Sub1VC1+

AO+ to Sub2VC1+

Sub1VC1- to Sub1VC2+

Sub2VC1- to Sub2VC2+

AO- to Sub1VC2-

AO- to Sub2VC2- 

 

Set your Crossover to LPF

Adjust the bass gain down to lowest until you test.

Set the Frequencies to midrange between 40 and 100hz  

 

Your box can be ported or not. It depends on the space your have.  If you do not have much room, go Enclosed and build a box that the inside space is less than 1 cubic foot.  Make sure you give barely  enough clearance for the speaker to fit.  If you have room, Go with a box and vent it with a 3 inch Vent tube 10 inches long.  

Posted on Oct 15, 2007

  • Greg Stokes
    Greg Stokes Oct 15, 2007

    When Adjusting your Bass Gain adjustment.  Set it while your testing the sound.  Turn it up until you get distortion, then back off a little. Kick anyones tail if they touch the gain you set. This can destroy your amp and your speakers.

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Building Competition stereo's is a big hobby of mine.

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What size enclosure (sealed)for Alpine 12"1242D(METAL Music)


  • 12" subwoofer with dual 4-ohm voice coils
  • Kevlar reinforced pulp cone with Santoprene™ rubber surround
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  • frequency response: 25-500 Hz
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  • peak power: 1,500 watts
  • sensitivity: 85 dB
  • top-mount depth: 7-5/8"
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