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XO Vision car head unit has 1 subwoofer output. Hooked Y connect to it to run RCA. Amp green light on but no sound only from amp. If factory amp, do I have to add something for it to let my subs play

Posted by Woody Barringer on

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Richard Foster

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  • 88 Answers

How is the system connected? Are you using aftermarket amp or factory amp, check speaker wire from amp yo subwoofer, and volume levels kn the amp if aftermarket.

Posted on Oct 11, 2019

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5 Related Answers

Anonymous

  • 631 Answers

SOURCE: No power output

Set the meter to AC volts and measure the AC voltage on the RCA cables where they plug into the amplifier. The black meter leat will go on the shield ground of the RCA cable. The red lead on the center conductor. You may have to turn the volume up to get a reading on the meter. At high volume, you should read at least one volt but the actual voltage will vary due to the audio signal. If you get no voltage on the RCAs, measure the AC voltage on the input to the LOC. Let me know what you find.

Posted on Oct 05, 2007

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Anonymous

  • 117 Answers

SOURCE: Subwoofer Output Not Working...

first check that the subwoofer function on the actual head unit is turned up,second check that the gain on the amp is at bout half way then check that it is on a lp (low pass setting)
then check that the boost on the amp is turned up.
please leave feedback.
cheers

Posted on Jul 02, 2008

blueextc3221

blueextc3221

  • 15935 Answers

SOURCE: My amplifier has one pair of rca inputs. radio only has 1 output

Subwoofer signals should be MONO - not stereo (hence the single Component out on the radio)
Only use one RCA to send signal to your amplifier.

If you use a Y splitter - the signal voltage will be cut in half - deteriorating the quality, and therefore amplifying "dirty" signal.

If you require further help, simply reply to this thread.

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

Posted on Apr 09, 2009

Anonymous

  • 1126 Answers

SOURCE: No sound output to subwoofer(s) status leds

There should be an amp input level control somewhere close to the rca inputs...does this have any effect?

Posted on Nov 04, 2009

MNfisherman

Nate Stansfield

  • 11896 Answers

SOURCE: I have checked all connections to my amp

Your amp could be in protection mode! Sometimes turning up to high or wires touching will put in protection mode! It will have to be unplugged for a day or two to drain all power out of the memory. Leave accessorie/ignition wire hooked up, just not power and ground wiring. It should reset itself.

Posted on Jan 22, 2010

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No sound through AUX out

the aux output is for an mp3 player or ipod. Does the HU have preamp outputs? The RCAs from the amp should go into them. If it doesn't you might have to get a high to low level input converter
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Subwoofer out put there is 1 i have 2 rcas

Get RCA "Y" connector, radioshack, etc.
Or, plug your 1 RCA into the amp and wire to sub from amp
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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.

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I have all the wires running right but for some reason my amp is not picking up or pushing my subs. could the rca jacks be messed up on the stereo?

According to the specs for the xo 1945- the output is; 50W x 4 Max Power Output , and I do not see a pre amp output listed. So I think to connect subs, you will need a separate AMP.
The way this works; the rear speaker wires from the xo 1945 hook into the Add-on amp, for example a 4 channel amp. In a 4 channel amp, the rear speakers come off two of the channels of the add-on, and the subs come off the other two channels. There is also the option of bridging two channels for more output power to ONE sub.
You did not mention what size sub(s) you were thinking of adding, but keep in mind that the ox 1945 puts 50 watts MAX per channel. So, if you add two 12" subs and a 1500 watt amp to drive them, your total sound is going to be very uneven.
If you go on line and look up auto audio or amps, you'll get a good idea of all the Sub and amp options that are available.... Hope this helps.
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I got 4 ''15 inch kickers 2 5500watt power acoustik mono amps my problem is 2 kickers on the right side hittin hard but the 2 on the left not.i thought the amp on the left was bad so i took the rca of the...

Hello herb31,

It sounds like there is a difference in the signal levels on the inputs to the amps. You did not specify what the RCA's are connected to on the head unit side. If they are connected to a stereo pair of preamp outputs, you may be able to solve the problem by using only the channel with the higher signal and use an RCA "Y" adapter to split it to both amps. If they are connected to a dedicated subwoofer output on the head unit, make sure that the head unit is set for "subwoofer". Some less expensive head units, I know JVC in particular, has only 1 set of line outputs and requires you to go into their "PSM" (Preferred Setting Mode) to set the line output mode and if you select "subwoofer", then allows you to select the low pass frequency.

If you are converting speaker-level outputs through a "line out converter", check both the input and output levels.

Also, if you are splitting an output from the head unit, you still need to connect 2 RCA's to the amp inputs. The signal will be properly split if you use a 1-female to 2-male "Y" adapter. To feed the same signal to both amps, you would need 3 "Y" adapters. Feed the output signal to the female end of the first "Y", and plug the male ends into the other 2 "Y" adapters. Then, the 4 plugs you have left on the ends go into your amp inputs.

Hope this helps.
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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!
2helpful
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No sound

You need to buy an amp adapter. SCOSCHE OEA4 4-Channel Adjustable Factory Amplifier Int. 23 bucks on ebay. You most likely have a factory amp in your car and the head unit's speaker output wires are already amped. the factory amp can't understand the audio signal.

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Power on green light is on but no sound when speakers are hooked up

Light is on so suggests power, earth and remote turn on cable all ok. Now you just need to test the RCA signal and the AMP output. I take it you have used low level RCA as the input from the head unit? (two cables usually red n white although can somtimes be other colours) best way is with substitute amp n speakers etc although can be done with osciliscope or headphones. Once it is established the RCA signal is fine then you can check the speakers from the amp. disconnect them at the amp and put each of the two wires briefly to a battery, any battery will do e.g. 9v PP9 or 1.5v AA etc you should hear a pop from each speaker as you do it. that proves the speakers and wiring to them.
If there was no signal from the RCA the cables may be bad - requires testing from head unit to amp
failing that the RCA output may be reduced or turned off via a menu in the head unit
Or the RCA output from the unit may be knackered.

Sorry its a bit long hope it helps
Luda
1helpful
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I dont get any sound

Many vehicles have factory amplifiers that must be activated or bypassed when installing a replacement head unit. If the factory amplifier isn't integrated or bypassed, you won't hear sound from the factory speaker locations. Another possibility is that you have a shorted or pinched speaker wire or terminal. A short at any speaker will shut down the head unit's internal amp, killing the sound to all the speakers. The RCA outputs wouldn't be affected, so the subwoofer keeps playing.
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