Question about BOSS AUDIO SYSTEMS P128DC Car Speaker

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I cannot find a diagram of how to wire a boss audio phantom p128dc dual voice coil subwoofer with there being 4 binding posts on each side of the woofer.

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I will assume that you mean four posts total and not four on each side. It's a dual voice coil and you will need a jumper. Take a small strip of speaker wire and connect the positve and negative of one coil together. Take a close look, there is a dot on one positive and a dot on one negative. Jump these two together. Now wire the other positive and negative to the amp's positive and negative.

Posted on May 24, 2011

  • a_bracmike May 24, 2011

    The dots help at least, but yes 4 posts per side for 8 total(which is why its stumping me a little.)

  • Larry Spears
    Larry Spears May 25, 2011

    Well, you could wire them in series. Connect all positive in line and all negative posts the same.

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Wire diagram for subwoofers


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Option 1 (parallel/parallel) = 1 ohm load
Voice coils wired in parallel, speakers wired in parallel
Recommended Amplifier: Stable at 1 ohm mono 2_4ohm_dvc_1ohm.gif
Option 2 (series/parallel) = 4 ohm load
Voice coils wired in series, speakers wired in parallel
Recommended Amplifier: Stable at 4, 2, or 1 ohm mono 2_4ohm_dvc_4ohm.gif

Option 1 (parallel/parallel) = 0.5 ohm load
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Option 2 (series/parallel) = 2 ohm load
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Option 3 (series) = 8 ohm load
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1 Answer

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http://www.rockfordfosgate.com/rftech/woofer_wizard.asp?submitted=true&woofer_qty=2&woofer_imp=3

If they have dual 4 ohm voice coils, they can be wired to a final load of 1 ohm. Wire the voice coils in parallel and then parallel both subs. Like the diagram in Wiring Option #1 shown here.

http://www.rockfordfosgate.com/rftech/woofer_wizard.asp?submitted=true&woofer_qty=2&woofer_imp=4

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1 Answer

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Hello discrete01,

The Kicker model number 07CVR122 has dual 2 ohm voice coils, and can be wired for either 1 ohm or 4 ohms. Model number 07CVR124 has dual 4 ohm voice coils and can be wired for either 2 ohms or 8 ohms.

Kicker's wiring page is here: http://www.kicker.com/dvc_wiring

If you have the version with 2 ohm voice coils, you want to use the 2nd diagram for a final load of 4 ohms to the amp. The 1 ohm load is too low for the amp and will cause it to overheat and possibly fail. If you have the 4 ohm version, use the wiring shown in the 3rd diagram which is a perfect match for the amp.

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1 Answer

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1 Answer

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Hello bully_bread,

Your amp will be powering the sub at 4 ohms.

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A single 4 ohm sub with a single voice coil cannot present a 2 ohm load. However, a sub with dual 4 ohm voice coils wired in parallel will present a 2 ohm load.

Here's a link to Rockford_Fosgate's "wiring wizard" where you will find all combinations of subwoofer wiring and the resulting loads.

http://www.rockfordfosgate.com/rftech/woofer_wizard.asp

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