Question about Alpine Car Audio & Video

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Alpine CDE 141 will not output to sub

When i plug a 3.5mm jack w/rca into the amp the sub thumps. when i try the rca from the head unit i get nothing. all wires are good and in phase, have tried two rca wires that are known good. any ideas?

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  • patrick
    patrick Nov 24, 2013

    Ok so it is a fresh install of a known good amp, sub, and wires. amp gets power. sub gets power. it seems the input from the head unit is not working, because i can hook up a RCA cable directly to the amp and playing music from my phone and the sub thumps hard. when i run RCA cables from the head unit to the amp, I get almost no vibration from the sub. Equipment Alpine CED-141 Head unit, 2 pre outs. 3 days old. Memphis 500W PRX1500 Amp Memphis 12" sub.

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  • Alpine Master
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Your description is not very clear but my guess is that the output from the RCA connector on the head unit (receiver) is low level and intended to be connected to an amplifier input. Apparently the 3.5 mm "jack" (plug) connects something to the RCA input of the amp and that works.

Posted on Nov 24, 2013

Testimonial: "well i have tried the RCA inputs on a pioneer and an alpine head unit, i just put the specs up of the alpine as that is what im trying to use. The RCA cable goes from the amp to the head unit."

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hmmm..does the Ipod that works, have same version as the one that does not?

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SOURCE: connect alpine 7874 to alpine powered sub

You need to run the RCA cables from the head unit to the sub for the audio signal, and possibly a turn on wire (the blue one on the back of the head unit), unless the sub has an automatic power feature.

The sub also needs power and ground wires attached, but those do not connect to the head unit. Power should be run directly from the battery with an inline fuse, and ground should go to the nearest good ground point (Trunk latch, seat bolt, etc).

Posted on Mar 28, 2009

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SOURCE: Accessing aux port on Alpine CDE 9881

If you happen to have the tool which allows you to remove your head unit from the dash use it. If not go to crutchfield.com and get one it's useful for any audio enthusiast. Once you have the tool pull the head unit out on the back of the unit there is a cable that is black with a blue connector tip. This is what you plug your cable that you got from your audio dealer into. As for making the cable accesible you may have to drill a hole in your dash or run the wire around and out the glovebox which is also common and suggested for your particular car.

Posted on Jun 11, 2009

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SOURCE: i am getting a DC error on my alpine cde-102 head

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The DC error is most likely caused by a shorted or grounded speaker wire. Check all speaker wires, correct the problem, and then go into the sound setup settings and reset the POWER IC to ON.

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Posted on Sep 25, 2009

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SOURCE: how can i test my rca output jacks with a test

:) the rca jacks have to be connected to an amplifier,, their signal is too lay to even light a bulb.. you have to connect it to a car amplifier and then from the amplifier to the speakers..

Just so you'd know,, once your deck plays and you hear music on your speakers through your normal speaker wires,, RCA jacks work..

Ok you have 4 jacks,, 2 subs and 2 front.. These should connect to a preamp,, which takes 4 inputs and allows you to equalize or adjust how the music should sound,, now from the pre-amp,, it runs to an amplifier,, thats powers the subs and another that powers the speakers.. Some amps have 4 inputs so you can use one amp for your subs mids and heights..

for example a basic music system is

1 cd player
1 pre amp
1 amplifier (4 inputs, 4 channel out)

you bridge 1+2 and connect this to 1 12" double coil sub woofer

the next 2 connect to 2 mid speakers example "rockford or ev 5 / 8 " and 2 tweeters for heights..

Thats a kicking tricked out basic car audio system,,,

Hope that helps you understand how it works..


Posted on Mar 12, 2010

Testimonial: "after hours of web search and pioneer support, u hit my problem right on the head. outstanding job,thx"

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