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

Posted by on

2 Answers

Re: Wires

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

  • Level 3:

    An expert who has achieved level 3 by getting 1000 points


    An expert that got 10 achievements.


    An expert that got 5 achievements.

    Vice President:

    An expert whose answer got voted for 100 times.

  • Master
  • 709 Answers
Re: Wires

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.




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

Add Your Answer

0 characters

Uploading: 0%


Complete. Click "Add" to insert your video. Add


3 Points

Related Questions:

1 Answer

I have a kicker 10 comp d dvc 4 ohm 600 watt. How do I run a obcon 2000i 2 channel amp to it

You can't. Total mismatch of power and impedance.

You need a mono amp that can push the RMS watts of the sub @ 2 ohm (sub wired parallel).

More info here -

Jan 22, 2015 | Kicker Car Speakers & Subwoofers

1 Answer

Which will hit harded 2 ohm or 4 ohm

In general, the 2 ohm speaker will be louder than the 4 ohm with most amplifiers. For example with this amp being sold at Best Buy you have 400 watts rms at 4 ohms or 600 watt rms at 2 ohms. However, being the same model sub they should 'hit' the same.

Hope this helps


Mar 30, 2011 | Kicker CVR15-2 Car Subwoofer

1 Answer

Can I hook up 2 lanzar opti1532 subs 2 a kicker kx 1200.1 or do I need a bigger amp, its a 1ohm stable amp an birth sheet says 1390watts but they told me at 14+ volts it will do 1400rms

Based solely on spec sheet information the Lanzars can handle 1300 watts RMS and the KX1200 is rated at 300x1 @ 4 ohms, 600x1 @ 2 ohms, & 1200x1 @ 1 ohm. Even with a 1 ohm load you will still only be providing 600 watts to each sub. While the kicker will provide more power at 14+ volts, no car creates more than 12-13 volts via its alternator. A car battery only provides 12.6 volts. So you will be loking at 1200 watts from 1 channel as a best case scenario.

Additionally, with your 2 subs, they will need to both be Dual 4 ohm voice coils in order to net a 1 ohm final load. Each voice coil will need to be wired in parallel and then each speaker needs to be wired in parallel.

Dec 23, 2010 | Lanzar OPTI1532D Car Subwoofer

2 Answers


if you get the 4ohm you can wire it to run a 2ohm an the kenwood amp will push 900 watts at 2ohms.they say it can push up to 1800 watts,that would be at 1ohm.that kenwood runs 500 at 4ohms an 900 at 2ohm.if you need help wiring the sub or anything else let me know bertman285@hotmail,com Max Power Output 1800W Power Output 4 Ohm [14.4V] 500W x 1 [20-200Hz, 0.5%THD] 2 Ohm [14.4V] 900W x 1 [100Hz, 1.1%THD] Bridged[4 Ohm] -

Oct 09, 2009 | Alpine Type-R SWR-1242D Car Subwoofer

2 Answers

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
  • cast aluminum frame with perimeter venting
  • frequency response: 25-500 Hz
  • power handling: 200-500 watts RMS (250 watts per coil)
  • peak power: 1,500 watts
  • sensitivity: 85 dB
  • top-mount depth: 7-5/8"
  • sealed box volume: 0.57-1.0 cu. ft.
  • ported box volume: 0.75-2.0 cu. ft.

  • For rock, i actually have 2 seperate 12's in slot port boxes i built facing forward. Facing forward reduces a little resonance and spl, but keeps alot of that annoying rattle off your tag lol

    Hope this helps :)

    Dec 10, 2008 | Alpine Type-R SWR-1242D Car Subwoofer

    1 Answer

    L7 wiring options

    yes it should work fine i would bridge them up to 4 ohms each speaker then bridge them back bye conectin them on the amp by puting the red with the red and puting the black with the black if the amp only has 1 chanel then put both speakers red on the same positive on the amp and same with the negative now to bring the ohms up to 4 ohms conect the solid red to the black with dot with a short wire ok then the ones that are not run together will go to the amp giving offf 4 ohms and with the 2 speakers bridged together thay will reduce to 2 ohms witch means that eatch speaker will get about 600 wats of rms from the amp

    Aug 14, 2008 | Kicker Solo-Baric L7 S15L72 Car Subwoofer

    4 Answers

    Wiring Diagram

    i HAVE 2 12 KICKERS L7 RUNNING ON A PERFORMANCE TECHNIQUE AMP 2000 WATS THE ampl its a mono //and i want to know how to wire the speakers

    Jul 26, 2008 | Kicker Solo-Baric L7 S15L72 Car Subwoofer

    1 Answer

    Ohm load???

    You can't wire a pair of single voice coil 2ohm subs to achieve a 2 ohm mono load. Too bad you don't have 2 four ohm SVC's. Sorry

    Jun 19, 2008 | Jl Audio 12W3 Car Subwoofer

    Not finding what you are looking for?
    Alpine Type-R SWR-1242D Car Subwoofer Logo

    203 people viewed this question

    Ask a Question

    Usually answered in minutes!

    Top Alpine Car Speakers & Subwoofers Experts

    Colin Stickland
    Colin Stickland

    Level 3 Expert

    21840 Answers


    Level 3 Expert

    6993 Answers


    Level 3 Expert

    3018 Answers

    Are you an Alpine Car Speaker and Subwoofer Expert? Answer questions, earn points and help others

    Answer questions

    Manuals & User Guides