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Wiring sub amp to fusion h/u ca-cd500

The back of the unit has only one rca output for the subwoofer. ive tried pluging only one of the rca's in and used a 2 to 1 rca adaptor neither methods worked. fusion have been no help at all does anyone know how to wire this up

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  • Omad Sep 17, 2008

    the solution space was empty i dont think namishka actually posted a solution

  • Omad Sep 17, 2008

    using the 2 to 1 rca adapter to the woofer alone produces no sound so with the other speakers connected to it wont make a difference and the woofers amp will be set on low pass filter so if it were to work only low end sounds would come out of the speakers

  • Omad Sep 17, 2008

    in most cases that would work but in this case we're running 3 amps. it should be possible to run both the sub and rear outputs aswell as the front.(in my car i run 4 amps,1 off the front o/p's 2off the rear o/p's and 1 off the sub o/p) this is the first unit ive seen to only hav 1 rca o/p for the sub

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Your best bet is to buy a quality stereo. Then you will have more outputs. Research a unit for what your needs are. If you still need assistance please let me know.
Thanks,
Lee

Posted on Sep 17, 2008

  • Lee A.
    Lee A. Sep 17, 2008

    You are only trying to hook up amps/subs to that stereo correct?
    Thanks,
    Lee


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Hi,

If I understand your post right, you have:

  • a Fusion CA-CD500 with a single RCA subwoofer output;
  • you have a sub-amp with two RCA inputs;
  • tried a 2 is to 1 RCA adapter;
  • tried various connection method;
  • not had any success, that is to make the subs sound.
A couple of ideas:
  • most external amp would need the usual red (+12) and black (body ground) and a trigger wire, normally blue or blue w/ white stripe from the head unit;
  • most high end are bridgeable, so it would not matter which of the two RCA iputs have signal or if ever, there would be a marking;
  • initially determine if the sub-amp is working with or without the head unit by verifying if there is +12, negative is body grounded and jumping the trigger/turn-on to B+12; temporarily touching the free end of a plug RCA male should produce a thumping sound, if none, then the amp is defective, if yes then issue is with the head unit/remote trigger.
Hope this be of initial help/idea. Pls post back how things turned up or should you need additional information.

Good luck and kind regards. Thank you for using FixYa.

Posted on Sep 17, 2008

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Yes that will work do to rcas to that one
then hook the amp up to
red power
black neg
remote to the back of the head unit remote wire
then try the rca in every slot of the amp
make sure there is power there
and there is settings in the unit like it willl say rear ,or sub pick sub and then sub contoll high low medium

Posted on Sep 17, 2008

  • chris07551 Sep 17, 2008

    heres the low down if u are trying to run three amps off a head unit with 1 rcs at the back it wont work you cant split theat many off one everyone rca at the back is for one amp

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Yes. connect the sub woofer alone and use that 2.1 speaker system to hear the audio out.
the other 2 speakers wil be connected to the woofer

Posted on Sep 17, 2008

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1 Answer

I have a clarion m 309 radio and I'm trying to hook up a fusion FM 402 amp for a sub woofer. I had all speakers playing but, I could not control the volume of the sub with the radio. I need to know...


Amps usually receive their signal through RCA wires. Your radio should have one pair of RCA outputs on the back. (red and white) You will adjust your subwoofer volume by adjusting the gains on the amplifer (little knob next to the RCA inputs of the amp), then you can turn up the bass on your radio.

Sep 06, 2011 | Clarion Car Audio & Video

Tip

How To Diagnose No Sound Output From Your Vehicle Stereo


  1. Check each Subwoofer or Speaker that isn’t working for continuity - At the subwoofer or speaker, one at a time, test the terminals for Continuity using your Digital Multi-Meter; if your DMM doesn't have a Continuity test, use the Resistance, or Ohms, test and check for Resistance in the Subwoofer Coil (be sure to disconnect the subwoofer wiring before performing these tests).
  2. If they test out good, hook the wires back up and test the terminals at the terminal cup or at the Amp hookup if you didn’t use a terminal, don't hook it up to the amp yet. Sometimes the wiring inside the box can be a problem if it has come loose, or isn't making a great connection.
  3. If you have a Sub or multiple Subs with Dual Voice Coils, or multiple Subs with Single Voice Coils, make sure your wiring is correct by checking here: http://www.the12volt.com/caraudio/woofer_configurations.asp
  4. Make sure there are no Hi-Pass filters, crossovers, or multi Channel switches enabled.
  5. Replace your RCA cable/s with known working RCA cable/s from the Source/Head Unit to the Amplifier/s.
  6. Check your Head Unit settings; make sure the Bass is turned up and/or the Subwoofer setting is turned On.
  7. If you are still getting no output, try plugging in an MP3 player or CD player using a headphone to RCA adaptor and check for sound output. If there is still no output, your Amplifier outputs are probably burned out.

on Jul 18, 2010 | Car Audio & Video

1 Answer

NO BASS!!


1) Check the Subwoofer for continuity - At the subwoofer, one at a time, test the terminals for Continuity using your Digital Multi-Meter; if your DMM doesn't have a Continuity test, use the Resistance, or Ohms, test and check for Resistance in the Subwoofer Coil (be sure to disconnect the subwoofer wiring before performing these tests).
2) If they test out good, hook the wires back up and test the terminals at the terminal cup or at the Amp hookup if you didn’t use a terminal, don't hook it up to the amp yet. Sometimes the wiring inside the box can be a problem if it has come loose, or isn't making a great connection.
3) If you have a Sub or multiple Subs with Dual Voice Coils, or multiple Subs with Single Voice Coils, make sure your wiring is correct by checking here:
http://www.the12volt.com/caraudio/woofer_configurations.asp
4) Make sure there are no Hi-Pass filters, crossovers, or multi Channel switches enabled.
5) Replace your RCA cable/s with known working RCA cable/s from the Source/Head Unit to the Amplifier/s.
6) Check your Head Unit settings; make sure the Bass is turned up and/or the Subwoofer setting is turned On.
7) If you are still getting no or low output, try plugging in an MP3 player or CD player using a headphone to RCA adaptor and check for sound output. If there is still no or low output, your Amplifier outputs are probably burned out.

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1 Answer

I have a fusion sub and amp and have no instructions on how to wire this can somone please help ive got green wires red wire and a small thin blue wire


Hello nicole_murra,

The green wires are for signal input to the included amp and should be connected to a pair of RCA preamp outputs on your head unit. The thin blue wire connects from "remote" on the amp to a switched 12V output on the head unit (usually blue or blue/white). The red wire is for power and goes through the fuse to positive battery. You also need to connect the amp terminal marked "ground" to the metallic chassis of your vehicle, within a distance of about 1/2 meter or less. There's usually a short piece of wire with black insulation included in most amp wiring kits. If your Fusion sub did not come with such a wire, you can use any wire that is the same gauge (or bigger) than the red power wire.

Hope this helps.

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Hi i have fusion sub woofer can u help me to install just let me know how to install many wires so dotn know who to install in my car


  1. Batt + or B+ or Positive.
    This is the connection directly to your automobiles battery. It should be a fused connection rated to about 15% higher than the fuse installed in your amplifier.
  2. Negative or '-' or Ground.
    This wire should be just as thick as the 'Batt + or B+ or Positive' wire. This wire can attach to any solid clean metal connation in the vehicle. Usually a trunk latch.
  3. Remote or amp startup wire.
    This wire is a thin 12V wire that will come from the deck. It's a signal wire that tells the amplifier to turn on.
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    Low level inputs are in the form of RCA connectors and will require that your deck or head unit has low level or RCA outputs. High-level inputs are used for stereos that don't have low level or RCA outputs. They work by taking an audio signal directly from the vehicles speakers and then amplifying it as necessary.
  5. Speaker connection.
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2 Answers

Have one wire for audio sub out, but two input ports to amp


This one Wire should be for the +. Try connecting the + to the Head Unit and - to a Common Ground. At the Worst, You will Blow the Amp Fuse if not Correct. The Lead from the Head Unit is Only an Off and On from the Ignition. Please Rate My Response! Thanks!

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Some older Pioneer radios require you to connect the Subwoofer RCA to the rear output on the back of the radio and then you have to turn on the subwoofer in the menu on the radio. What model Pioneer radio is it? Also, make sure that the RCA plugged into the amp is on the input side, not the output side.

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Fusion sub..


check the impedenc on amp and speakers.if speakers have lower ohm the amp cant push them also can cause damage to amp.how do you have everything wired must be specific.high level inputs,rca,.how is the radio and amp wired together,where are you getting power sup[ply from and how?
chriszambrotta@yahoo.com

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