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

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

I have a mrp 1000 alpine amp, how do i wire these to get 2 ohm to the sub box. What size of speaker wire do i use.

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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.

Posted on Jan 12, 2009

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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

What is the best amp for one 15" alpine type r?


sub spec 250watts per coil you should be just fine I have 2 typr 15s on orion hcca 2500 1 and it kicks a$$ thats 1000 watts over the rated limits of the subs only shut the amp down once these subs can take a lot more power than they say just use your common sence with the volume and gain levels

Jan 31, 2012 | Alpine Type-R SWR-1242D Car Subwoofer

1 Answer

Have 4 - 12 alpine type R in custom box made just for them. Hooked up to a JL 1000 slash 1v2 mono. They all have power but when i really crank it one of them pops a little. Theres no way that amp could be...


It may not necessarily be pushing the subs to the blowing point, but you amp may be clipping. If you amp reaches a certain point where is strains for power, it cannot reproduce the frequency. The result is a "popping" sound. Your right in that the amp couldn't be doing that. Another thing to check is what is the ohm load on the amp. Is the amp 2 ohm or 1 ohm stable. You could be damaging the amp if it is not wired correctly. Hope this helps.

Aug 23, 2011 | Alpine Type-R SWR-1222D Car Subwoofer

1 Answer

What size amp do i need to run 4 1000 watt pyle 10's bridged


well first of all you cant bridge subs... you can bridge an amp... and for 2 they are probablly not 1000 watts, make sure you understand RMS and what the sub can ACTUALLY HANDLE properly... i would get a 1000 to 1500 watt RMS that is RMS RMS RMS RMS amp not one that says 2000 watts MAX POWER cuz thats cheap ****... get a kicker JL hifonic alpine or something in that category that actually tells you the TRUE power output of the amp... then run those 4 subs in a parallel circuit so its like really only having 2 subs. make sure then these subs do not run less then 2 ohms at the terminals while in a parallel, then bridge these subs acting as 2 subs not 4 to your TRUE 1000 watt amp and you should have a good powerful system

Mar 19, 2010 | Pyle 10'' Subwoofer Tube w/Amplifier Car...

2 Answers

What is the best way to wire two alpine SWR 1222D subs to a alpine PDX 1000 1


First off excellent choice on audio equipment, i guarantee you won't be disappointed. So your subs are dual coil 2 ohms. So wire each individual sub in series. If you don't know what this means i'll explain. On each sub there are 2 sets of wire terminals. Connect a wire from the one set's - to the other set's +. Do this on both subs and you will have the coils wired in series making each sub 4ohms. Now to hook the subs together you'll need to wire them in parallel. Now since you have your coils in series, on each sub you have one + terminal and one - terminal left. So run a wire from the + terminal remaining on each sub, and run them to your amp. Splice the ends of the two wires together and plug them into the + speaker output of the amp. Connect the two negatives in the same way and plug them into the - port on the amp. You will now have your amp running at its desired 2ohms. When wiring this disconnect the fuse on your amp power wire to avoid short problems. And if you get confused at all, and aren't sure what to do, ask again don't guess, if its done wrong you could severely damage your equipment. Hope this helped, enjoy the bass...

Sep 16, 2009 | Alpine Car Audio & Video

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I just wired my alpine type 12 4 ohm subwoofer to two ohms by putting the two red runners in the positive terminal and the two black runners to the black terminal and hooked the wires up to the outside...


If you have the Alpine SWR-1222D, that's a dual 2 OHM Sub. So, the way you have it hooked up to the amp ,it's 1 Ohm, and unless your amp can safely operate at 1 OHM, you are better off connecting the voice coils in series so the amp will see 4 OHMS. The link below will show how the connections are made to the amp. Look at example # 1.

http://akamaipix.crutchfield.com/Manuals/500/500SWR1242.PDF

Hope this helps!

Aug 19, 2009 | Alpine SWR-1222D 12" Type-R Series...

1 Answer

Sub cutting out


500W x 1 @ 2ohm

How did you "switch the sub from 2ohms to 4 ohms"?

If you have the swr-1222d as listed, your only options are wiring 1 or 4 ohm, as it is a dual 2 ohm voicecoil.

If it was wired @ 1 ohm - you may have already done the damage to your amplifier - as it is not rated @ 1ohm mono.

There are 3 reasons the amplifier will go into protect mode while playing...
Thermal - overheating due to too low impedence.
Ground Loop/Short Circuit - Blown voicecoil, bad amplifier ground, tinsel slap, etc.
Overload - Impedence not within specs.

Disconnect every wire (including RCAs) from the amplifier. Reconnect only power and ground - make a short wire to loop from power terminal to remote terminal.

If the amplifier stays on without turning off - remove the jumper, add the remote wire, and try again.

If it turns off - the problem is internal and needs repair.

Still on? plug in 1 rca, and re-try.... then the other.

Still going??

Now use an Ohm Meter - or Digital multimeter set to ohms 20, and check both voicecoils. They should read 2ohms +/- .5ohm.

If they are OK, wire up the 4ohm load (series the voicecoils) and turn the gain on the amplifier to 1/2.

Retry -

If the amplifier continues to fail at higher volumes - the thermal protection relay has become weakened because of your improper wiring, and will need to be repaired to solve your issue.

Thanks for using FixYa - a FixYa rating is appreciated for answering your FREE question.

Jun 10, 2009 | Alpine Type-R SWR-1222D Car Subwoofer

1 Answer

Running 4 12s with two insignia 1000 watt amps


Use a pair of two-channel amps that are two-ohm stable, and wire a pair of subs to each amp. Wire them in parallel so the amps see two ohms (wiring in series will show four ohms). Doing this effectively "doubles" the power of the amps. If the amps are not two-ohm stable, they'll fail. Parallel wiring means putting the positive wire of sub 1 to the positive terminal of channel 1 on the amp, and the negative wire of sub 1 on the negative terminal of channel 2. Do the opposite for the second sub. This will give you a LOT of bass response as long as your sub enclosures are properly sized for the speakers.

Jul 21, 2008 | Insignia Car Audio & Video

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

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