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Thread: connecting subwoofer to a 2 channel amp

  1. #1
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    Default connecting subwoofer to a 2 channel amp

    how do i do it?? do i connect it to R- and R+ or L- and L+ or a combo?? help?

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    How many ohms can you run the amp? how many ohms are your speakers rated at? This will decide if you can run parrallel or not.
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    Bridge it instead....

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    yea, oops
    Current Cars:
    2019 BMW X3 M40i Stage 2, 12.44 at 110mph
    1972 Chevy Super Cheyenne C10 Pickup 402 big block, 700R4
    2004 GMC 2500HD 8.1L

    Past Cars:
    1970 Chevy Blazer, 2wd
    2003 BMW X5 4.6IS Doushmobile, moneypit
    2015 Ford Fiesta ST | Cobb Stage 1, catless downpipe
    2008 Corvette Z06 - 11.39 at 123.8mph
    2002 Corvette Z06 - 12.10 at 116.5mph
    2005 Jeep Wrangler LJ
    1993 5L Mustang - 12.59 at 108mph
    1989 5L Mustang
    1990 Jeep Cherokee
    1991 Acura Integra RS 403Honda

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    how do i bridge the amp?? is there a button on the amp or do i do this using the deck?

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    You'll have to read the manual on that one.... It's either use R- and L+, or R+ and L-. Basically it involves using on polarity on each channel. Make sure your amp is bridgeable.

  7. #7
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    It is possible when hooking up more then one speaker to an amp. wiring them in parallel or series makes the difference. Series = more power + harder on the amp.
    Current Cars:
    2019 BMW X3 M40i Stage 2, 12.44 at 110mph
    1972 Chevy Super Cheyenne C10 Pickup 402 big block, 700R4
    2004 GMC 2500HD 8.1L

    Past Cars:
    1970 Chevy Blazer, 2wd
    2003 BMW X5 4.6IS Doushmobile, moneypit
    2015 Ford Fiesta ST | Cobb Stage 1, catless downpipe
    2008 Corvette Z06 - 11.39 at 123.8mph
    2002 Corvette Z06 - 12.10 at 116.5mph
    2005 Jeep Wrangler LJ
    1993 5L Mustang - 12.59 at 108mph
    1989 5L Mustang
    1990 Jeep Cherokee
    1991 Acura Integra RS 403Honda

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    ok i found out, its L- and R+, do i put the amp onto High Pass. Low pass, or OFF??
    and what should i set the subwoofer crossover frequency to?

  9. #9
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    Carefull not to run it at too low a load(ohms).

    freq? what size is it? box spec?
    Current Cars:
    2019 BMW X3 M40i Stage 2, 12.44 at 110mph
    1972 Chevy Super Cheyenne C10 Pickup 402 big block, 700R4
    2004 GMC 2500HD 8.1L

    Past Cars:
    1970 Chevy Blazer, 2wd
    2003 BMW X5 4.6IS Doushmobile, moneypit
    2015 Ford Fiesta ST | Cobb Stage 1, catless downpipe
    2008 Corvette Z06 - 11.39 at 123.8mph
    2002 Corvette Z06 - 12.10 at 116.5mph
    2005 Jeep Wrangler LJ
    1993 5L Mustang - 12.59 at 108mph
    1989 5L Mustang
    1990 Jeep Cherokee
    1991 Acura Integra RS 403Honda

  10. #10
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    10" JL 10W3, and it is a ported box....umm...i dont remember the specs....

  11. #11
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    I'd say set the freq to 60hz. play around w/ it though.
    Current Cars:
    2019 BMW X3 M40i Stage 2, 12.44 at 110mph
    1972 Chevy Super Cheyenne C10 Pickup 402 big block, 700R4
    2004 GMC 2500HD 8.1L

    Past Cars:
    1970 Chevy Blazer, 2wd
    2003 BMW X5 4.6IS Doushmobile, moneypit
    2015 Ford Fiesta ST | Cobb Stage 1, catless downpipe
    2008 Corvette Z06 - 11.39 at 123.8mph
    2002 Corvette Z06 - 12.10 at 116.5mph
    2005 Jeep Wrangler LJ
    1993 5L Mustang - 12.59 at 108mph
    1989 5L Mustang
    1990 Jeep Cherokee
    1991 Acura Integra RS 403Honda

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    low pass


    CONCRETE PATIO SPECIAL, PM ME FOR DETAILS!

  13. #13
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    Originally posted by inspire
    ok i found out, its L- and R+, do i put the amp onto High Pass. Low pass, or OFF??
    and what should i set the subwoofer crossover frequency to?
    After that display of lack of knowlege, I recommend your nearest stereo shop does the setup for you
    Scott
    CFB Esquimalt/HMCS Protecteur

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    well...i am here on a forum seeking answers to my questions. I am hoping to learn about things from people who are knowledgable in this field. I want to be able to learn what all the controls do. I am glad there are people like D'z nuts who are actually here to help people in my position instead of people like you who arent helping me in any way at all

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    Sorry if i was a bit harsh, I would just hate to see you hook it all up and then put it in high pass and fry the sub. Not tryin to be rude.
    Scott
    CFB Esquimalt/HMCS Protecteur

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    Originally posted by Scott
    Sorry if i was a bit harsh, I would just hate to see you hook it all up and then put it in high pass and fry the sub. Not tryin to be rude.
    Of course, you could've just told him the difference

    Basically the difference between low pass and high pass is the frequency the amp is allowed to output to the speaker. Since subwoofers play lower frequencies, the low pass would filter out any higher frequencies the woofer wouldn't be able to play anyways (which could even damage the sub, as Scott mentioned). Similarily, the high pass filters out the lower frequencies and is usually used for speakers, such as components, coaxials, etc.

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    everything is working good now! thx guys! but my amp isnt powerful enough!! it is a Phoenix Gold QX2180, 180 watts when i bridge it!!! my amp isnt giving enough power to my JL 10w3, can anyone recommend an amp that will power this adequately? for around 200??

  18. #18
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    That is probably not going to power that sub and speakers (If you still have them wired too). Get yourself another sub. With xmas and boxing day coming up, you should be able to get a lower end amp for about $200.
    Original Post NAZI Moderated


    Originally posted by r3cc0s
    Felon or Mistermeiner

  19. #19
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    it is just powering my sub now....

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