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

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I have 8 alpine dvc type r 12s, should i port them or go with a sealed box.

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Depends what kind of car they are going in and what kind of sound you are going for.
generally speaking ported boxes are louder, if you choose this i would recommend filling box with poly-fill.
non-ported boxes get deeper bass and hit much harder. no matter what set up you choose a good quality box that does not flex is EXTREMLY IMPORTANT. you will want the wood to be at least 3/4" thick and the correct cubic feet.

Posted on Mar 31, 2011

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Posted on Jan 02, 2017

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Need box specs for Alpine dvc type r 2ohm 12"


  • frequency response: 24-200 Hz
  • power handling: 300-600 watts RMS (300 watts per coil)
  • peak power: 1,800 watts
  • sensitivity: 85 dB
  • top-mount depth: 6-3/8"
  • sealed box volume: 0.65-1.25 cu. ft.
  • ported box volume: 1.0-2.0 cu. ft.
  • Crutch field audio has a DIY section on box building ;)

Oct 20, 2014 | Car Audio & Video

1 Answer

I have a 12" d4 type r 1000 rms and a alpine 1000 amp speaker sounds great but smells like something is burning, my amp never over heats or shuts down but the smell is still coming from the sub?


Cut your gain back on the amp. It sounds like they are set too high. Check your install instructions on how to set your gain. If you have a 4 or 5 volt output head unit your will not be at half way. Im running a JL Audio 500 /1 on a skar wwv10 dvc in a ported box. My gain is set about half way & its plenty loud.I have a Alpine 9887 headunit 5 volt output on my RCAsI can take a volt meter & set my speaker output at 45amps & my gain in perfect.

Apr 28, 2014 | Alpine Type-R SWR-1242D Car Subwoofer

1 Answer

What box should i use for alpine swr-12d2


What size box does this sub need in a sealed box & a ported box. If you have room use a ported box that fits your subs. Probox & other brands may have the perfect box for them. I would tune the box to 40hz if you like loud tight bass.

Jan 24, 2013 | Alpine 2 Swr-12d2 Car Ausio 12" Dual 2-ohm...

1 Answer

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


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.

Mar 17, 2011 | Alpine Type-R SWR-1242D Car Subwoofer

1 Answer

I have 2 dvc 4 ohm alpine type r 15's and 2 svc american bass


Hi mate very nice amp you got there here is the specs for it



Model: MA Audio HK401SX
Hard Kore Series 1800 Watt 1 Channel High Performance Class X Car Amplifier
1 x 1800W RMS @ 0.5 Ohm Mono
1 x 1200W RMS @ 1 Ohm Mono
1 x 650W RMS @ 2 Ohm Mono
1 x 500W RMS @ 4 Ohm Mono
Fully Unregulated MOSFET Power Supply
2 Ohm Stable @ Mono
1 Ohm Stable @ Mono
0.5 Ohm Stable @ Mono

if you have 2 12s just bridge them and you will have 650wrms at 2ohm running to them or one sub at 4 ohm 500w rms ps they should pump iam running 2 12s with just 360rms at 2ohm and they do the job good luck


Oct 19, 2009 | MA Audio HK401SX Car Audio Amplifier

1 Answer

How do i drop it down to 0.5 ohm


there are no settings on the amp, if it is made to be stable at .5 ohm you will need 8 voice coils to make .5 ohm, if your subs ar 2 ohm, you will need 4 coils to make .5 ohm when hooked in parallel

Sep 23, 2009 | MA Audio HK401SX Car Audio Amplifier

1 Answer

Need dimensions of port


check the 12volt.com they have a lot of information about speaker enclosures and even mathematical computations to allow you to optimize the enclosure design for your preferences hope this helps
ryan

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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