20 Most Recent Alpine Type-R SWR-1042D Car Subwoofer Questions & Answers

Depending on the amount of speaker that you have, Alpine recommends that you use anywhere from .85 cubic feet to 1.25 cubic feet per subwoofer. This choice will be reflected by the sound of your subwoofers. If you choose to use .85 cubic feet per subwoofer, you will get a tight sound without excessive cone excursion.
However, if you decide to use 1.25 cubic feet per subwoofer, your subwoofers will hit lower notes and be able to handle more power.
These are factors that you, as a listener, will have to bear in mind when choosing a subwoofer enclosure. Regardless, enjoy your speakers!

Alpine Type-R... | Answered on Mar 01, 2011

they best way to do this is with a multi meter on the OHMS setting.... to do this set the multi meter to the least ohms setting, usually it reads 20 or under. Connect the wires to each voice coil (by the speaker wire connections) if the multi meter reads 2 to 4 ohms whichever your speaker is, then the voice coil is not blown, but if it reads 8-10-12-14 or OL which means open loop then the coil in junk.

Alpine Type-R... | Answered on Feb 06, 2011

Use a multi-meter to test the resistance of each coil on it's own.

Alpine Type-R... | Answered on Feb 06, 2011

make sure if the amp work at 1 or 2 ohms you need to setup the same in the woofer.chek if the woofer is 2 or 4 ohms dual voice coil and how the amp work better

Alpine Type-R... | Answered on Sep 26, 2010

crackling noise or really bad distortion check wires and if blown send it to alpine

Alpine Type-R... | Answered on Jun 07, 2010

some times you cant visually see if a speaker is "blowed up". Many times (especially with new subs) the voice coil can burn out due to being worked too hard, too much voltage, or too little voltage. most manufacturers recommend not using the sub at max for several days to brake it in. that said, check (with an ohm meter) tho see if it has the proper resistance flowing through the sub. Next i would (assuming you have it hooked up to an amp) check the amp and make sure it is functioning properly...

Alpine Type-R... | Answered on Apr 30, 2010

it depends on the amp what can it handle. will it do 2 4 or 8 ohm is it 1 ohm stable are the subs dual 2 ohms or dual 4 ohms. 1042s are dual 4 ohm subs so if you wire them both in paralel it will drop both subs into a 2 ohm load for each sub that is pos of one coil to pos of sec coil then pos to pos on amp and same with neg to neg to neg on amp. now if your amp is 1 ohm stable i would do both subs the same way you will get the most power out of the amp. but itll run a littl hot if you dont have adaquate power running to the amp. now i wanna think your alpine amp maybe only 4 ohm stable. i would run both subs like i had said pos to pos then neg to neg now both subs will be a 2 ohm load so what you do to bring it back up to 4 is you run the 2 bridged subs into a series which is pos from one sub to neg of the other sub the remaining pos and neg will run to the amps pos and neg. which will make it into a 4 ohm load. now the last scenereo is your amp is 4 ohm or 2 ohm stable. this is how to wire it to 2 ohms and not 1. take one sub go pos to neg then pos to pos on amp and neg to neg on amp this will make an 8 ohm load with one sub take other sub and do the same neg to pos on sub then pos to pos on amp and neg to neg on amp this will tell amp to run a 2 ohm load. 2 ohms is a good run for these subs if the amp can handle a 2 ohm load. now if you would have given the amp model number i could have looked it up to just give you what you needed but with this short info i gave all possibilities.

Alpine Type-R... | Answered on Apr 23, 2010

make sure you are putting rms power to them

Alpine Type-R... | Answered on Apr 01, 2010


Alpine Type-R... | Answered on Mar 26, 2010

2ohm or 4ohm subs?

Alpine Type-R... | Answered on Dec 31, 2009

ground is loose(most likely amp), battery running low, subs might be damaged? feel free to keep me in touch if problem occurs more after checking grounds and power source and subs. Also might need to re-tune your head unit and amp?

Alpine Type-R... | Answered on Sep 16, 2009


Please tell me the specs of your sub woofer,. and we can match this issue.


Alpine Type-R... | Answered on Jul 01, 2009

Make sure that the rca cables that you have coming out of the deck to the amp arent switched to highpass(no bass) and check the amp and make sure that the crossover is set to lowpass(LP) see if that helps

Alpine Type-R... | Answered on May 30, 2009

I'm assuming that you have an amp that you are installing these to. Its always tricky installing subs of different impedances. Do you have the model number of the amp that you are hooking them up to.
Most likely if you have a 2 channel amp, you would connect one sub to each channel as most amps can handle a 2ohm load in stereo, but don't bridge the amp with these two subwoofers without specific instruction from someone with experience as you will most likely overlad the amp. If you can be more specific with your set-up I'd be able to assist you more.

Alpine Type-R... | Answered on Mar 30, 2008

How would anyone without access to your documents know that!

Alpine Car Audio... | Answered on Aug 03, 2020

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