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

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I'm trying to find the best box size for my single alpine type R 1242D?

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The subwoofer box ratings for this subwoofer are as follows:

  • sealed box volume: 0.57-1.0 cu. ft.
  • ported box volume: 0.75-2.0 cu. ft.

Posted on Mar 17, 2011

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How to wire 2 alpine typre r 1242 to an alpine pdx1000 mono amp??


If they are single voice coil, just hook one up to the amp (bridged) like normal and run a jumper wire from the positive of the sub to the positive of the second one, then do the same for the negative....This will give you a lower ohmage, thus better bass!!!

Oct 19, 2010 | Alpine Type-R SWR-1242D Car Subwoofer

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What is the best box for 2 ALPINE SWR-1242D 12"SUBWOOFERS TYPE-R NEW SUB WOOFERS


Ported and tuned to around 37-40 hertz. After all displacement the box should be in the 2.2 cubic foot for sub and you will be very impressed. Build it yourself for optimum sound and output.

May 23, 2010 | Alpine Type-R SWR-1242D Car Subwoofer

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Whats the best box for single alpine type r sub


get your manual out go to a box calculating site and youll have your answer
http://www.carstereo.com/help/Articles.cfm?id=5
go here with your sub specs

Oct 21, 2009 | Alpine Type-R SWR-1242D Car Subwoofer

1 Answer

Has my subwoofer been blown?


hook ithe sub up to a 9volt battery and see if the woofer moves... You will not dammage the suub testing it this way.

Mar 23, 2009 | Alpine Type-R SWR-1242D Car Subwoofer

1 Answer

Alpine 7190ET Manual


Enter Alpine car audio in your search engine and go to alpines home page and then click on support then enter in the product # SWR-1242D and it will pull up the manual.

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

1 Answer

How to wire 2 ohm 2 12ich alpine type r's to box terminals?


Dual 4 ohm subwoofers can only be wired @ 1 ohm, 4 ohm or 8 ohm.
2 ohm mono load is not possible.
You will need to use (1) subwoofer to get the 1000W out of the amp.
Wire both positives on one sub to + on amplifier and both - on the same sub to - on amplifier to give the amplifier a 2 Ohm load.
Add a second amplifier, or buy an amplifier that is 1 ohm mono stable.
You can wire both to the amplifier at 4 ohms 600W, but they will share the power and only see 300W ea.

Jan 12, 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

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