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

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SWR-1242D wired at 4ohms

Hey I have a single SWR-1242D with a MRP-M1000. The only wiring diagrams it gives me are for 2ohms and 8ohms. The amp at 2ohms would be giving 1000rms which is more then the like 600rms the sub can handle so im worried about blowing it. Also to my knowledge(which there is very little of) I cant or should not wire it for 8ohms. If anyone can please help me out I would greatly appreciate it.

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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.



Posted on Feb 10, 2009

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I dont how to run the wire on the back of my alpine type r 1242d


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Nov 12, 2011 | Alpine Type-R SWR-1242D Car Subwoofer

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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

1 Answer

What is the best way to connect two 4 ohm type-r


Connecting the speakers in parallel is the best route here. Parallel wiring is simply connecting the positive wires together and connecting the negative wires together. Then connect both positive wires to the positive output of the amp and both negative wires to the negative output of the amp. When both 4ohm speaker are connected in parallel the combined impedance is 2ohms. This particular amplifier has a damping ratio of >250 at 2 ohms compared to a damping ratio of >1000 if you connected them in series at 8 ohms. the damping ratio is simply the reduction of power transferred. (For future reference in order to get the maximum power transfer input impedance must match the output impedance.)

Jul 24, 2010 | Alpine Type-R SWR-1242D Car Subwoofer

2 Answers

NOT SURE WHAT OHMS SUB I NEED!


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

Type rs not hitting


sometimes RCA cables to the amp can go bad give them a look-see they may need to be replaced. I doubt you have a problem with the speakers themselves. you may also check the ground wire to the amp, make sure it has a tight metal to metal connection

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How do you wire 4 kicker cvr dual voice coil 4ohms to a 1500.1 kicker mono block 1 channel amp, they sound distorted when i turn them up, how should i wire them?


Hello antjobe,

According to Kicker the 1500.1 is only stable to 2ohms. So you will want your 4 CVR's to present a 2ohm or higher impedance to the amp.

The best configuration would be to wire the voice coils in series (each sub 8ohms) and then parallel all of the subs to the amp (2ohms). Here's a link to the diagram.

Hope this helps.

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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

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

Unsureness of wiring configurations.


Mamola,

Get an amp with at least 200 Watts RMS. The RMS value is what is important about driving Subs. This could be proclaimed to be a 1000 Watt amp. REad the RMS value.

Wiring. It is better to series your Speakers to give them and your amp more reliability,

Get a Mono or Bridgeable amp. If it si bridgeable, BRidge the output as described in the manual you get. Some Amps have a diagram right on the output..

AMP+ to Sub1 +
Sub1 - to Sub2 +
Sub2 - to Amp -

Get a 4 Guage wring kit. Run your power wiring down the Drivers side, and Audio signal wiring down the Passenger side, keep the two separate.

Nov 26, 2007 | Kenwood 12" 4-Ohm Single-Voice-Coil...

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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