Question about Hifonics BX1500D Car Audio Amplifier

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General question I have two alpine swr-1242d in a ported box. any suggestions on how to tune my amplifier to go get the best results with my set-up? Tony

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  • tonytran813 Oct 28, 2008

    I'm Sorry, I should have been more specific... any suggestions on how to adjust crossover frequency, bass boost, etc.

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You could bridge the speaker wires going to the amp to get maximum power out of the amp to the subs

Posted on Oct 27, 2008

  • matt Stahulak Oct 28, 2008

    oh there isn't just those like black nobs that u can turn left and right to increase and decrease the amplification?

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1 Answer

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


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.

Mar 31, 2011 | 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?


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

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

1 Answer

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

SWR-1242D wired at 4ohms


Hi!

Having to much power for a subwoofer is a veeeery good thing, it will provide a lot of control and quality sound to your sub.

But this sub is a dual voice coil at 2 x 4ohm so if you want to hook it up at 4 ohm u need a 2 channel amplifier running mono mode.

i dont recomend that you hook up in 4 ohm, its better to take some time adjusting the levels on the amp and the headunit.

This system has the potential to create a realy good bass sound if u tune it the right way.



Feb 10, 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

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

    2 Answers

    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.

     

    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.  

    Oct 15, 2007 | Alpine Type-R SWR-1242D Car Subwoofer

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