no sound from subwoofers
Printed From: the12volt.com
Forum Name: Car Audio
Forum Discription: Car Stereos, Amplifiers, Crossovers, Processors, Speakers, Subwoofers, etc.
URL: https://www.the12volt.com/installbay/forum_posts.asp?tid=54682
Printed Date: May 17, 2024 at 9:29 PM
Topic: no sound from subwoofers
Posted By: jrocc36
Subject: no sound from subwoofers
Date Posted: April 26, 2005 at 5:49 PM
Hello, this is my first car sterio system and I am having many problems.Everything is hooked up fine with the amp but for some reason I am getting no sound at all from my subwoofers.At first I thought the amp was blown but since then I have tried many woofers and amps with the same connection and the problem still persists.I even went out and bought a new RCA wire but to no avail.Any comments or helpfull hints will be appreciated, Thank you very much ------------- Jay Mccabe
Replies:
Posted By: Asmodeus
Date Posted: April 26, 2005 at 6:04 PM
If you have access to a Digital Multimeter go to the amp and check to see that you have at least 12V at the amp...If not then check your connection to the battery ...If that is good then replace your fuse,... Also while at the amp meter the Remote wire (make sure that the car is on and the head unit is on)....If you have no voltage on the remote wire then check your connection behind the radio and make sure you havent pulled it loose putting the Headunit back in the dash.... Also make sure you have a good ground (Scrape the paint off ETC) Check the fuses in the amp.... Look on the amp where you hook the Pow, Gnd, and Rem wire and make sure that none of the wires are frayed and touching other terminals... If I can think later I will post more...This should get you started... -------------  Making the World A Louder Place
Posted By: jrocc36
Date Posted: April 26, 2005 at 9:06 PM
is there a chance it could be my CD players RCA jacks that are the problem?
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Jay Mccabe
Posted By: jrocc36
Date Posted: April 26, 2005 at 9:10 PM
oh sorry, but by the way everything sounded great when I installed it then all of a sudden it stoped working.everything is connected the way it should be
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Jay Mccabe
Posted By: wayland1985
Date Posted: April 26, 2005 at 9:25 PM
Check all of your fuses... ALL OF THEM... check the inline fuse near the battery, check the fuses on the amp, and any other fuse on the line.
Also check your cable to make sure the insulation is still good. Look for cracks, scrapes...make sure there is no break in the insulation.
Check that the power wire and ground are properly secured into the amplifer.
Make sure your ground is tight and secure to a metal floorboard (no seat brackets or anything of that nature, just straight to the floor). Also make sure ALLL paint is scraped away (often gray primer can look like metal...). If you have a crimp on ring terminal, make sure the crimp is good and secure, and that the ring terminal is bolted firmly down (no play at all should be present. If there is, use a bigger bolt and a washer).
Check that your gains are set properly.
Can you tell us whether or not the amplifer even turns on?
If it doesn't turn on, disconnect your turn-on power wire, and make a direct connection from the power terminal to the turn-on terminal. If this doesn't turn it on, and you've followed all of the steps above, then your amp is bad. If it does turn on, then we have to look at other things.
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~WAYLAND
Posted By: jrocc36
Date Posted: April 27, 2005 at 9:28 AM
Yes the amp turns on, not even in protect mode. The green light stays on and I have complete power to it just no sound out of my woofers.I replaced all of my fuses and wires also.
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Jay Mccabe
Posted By: DYohn
Date Posted: April 27, 2005 at 10:58 AM
If the amp appears to be powering with no protection light, try feeding it a signal from another source (like anothjer line level output from your HU or even from a boom box.) If it works, then the problem is in your HU or your RCA cables. If not, then the problem is blown speakers or fried amp. ------------- Support the12volt.com
Posted By: jstruckman
Date Posted: April 27, 2005 at 11:03 AM
Again, with your meter check to see if there is AC voltage on the RCA's while you have music playing, It would be best if you have a CD that played test tones on it. If you are getting voltage on the RCA lines then the next step is to make sure your subs are wired properly, make sure the wires did not come off the speaker terminals. If these are good, then you probably have a bad amp. It should be pretty easy to figure out the problem. What head unit do you have? if it has subwoofer RCA outputs and that is what your RCA's are connected to, make sure the subwoofer output is turned on on the radio.
Jazzy
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Posted By: jrocc36
Date Posted: April 27, 2005 at 2:11 PM
I tried pluging it(the RCA wire) into the headphone jack on my portable cd player and my home head unit(the RCA didnt fit well at all though),then to the channel i was running my speakers to on the amp and still did not get any sound from the subwoofers.I even installed the whole system in a friends car to see if it worked and both amp and subs worked fine.I do not have access to a voltage meter and if I did, what how many volts would the jacks suppossed to be?Thank you very much for your time.
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Jay Mccabe
Posted By: DYohn
Date Posted: April 27, 2005 at 2:14 PM
jrocc36 wrote:
.I even installed the whole system in a friends car to see if it worked and both amp and subs worked fine..
Then I suspect you have a defective head unit. ------------- Support the12volt.com
Posted By: jrocc36
Date Posted: April 27, 2005 at 2:39 PM
hey you guys have been a big help thanks for your time ------------- Jay Mccabe
Posted By: Hoodbilly
Date Posted: June 18, 2005 at 3:39 PM
Did you find an answer? I am having the same problem, I have two 12" Fosgate Punch subwoofers that just quit working. I hooked up another box with a single alpine 12" to the amp and it works fine, so I assume the amp head unit and wiring is working fine. The speakers have no visual damange, I thought it was strange they both stoped working at the same time, they were in installed in a box connected in parallel. During troubleshooting I connect each speaker sepertaly, still no souond. I suppose it is possible that one went out some time ago, and I just did not notice the difference. I am not very experence with car audio, I always thought a blown speaker sounded really crappy but it still produced a sound, is it a common failure to have no sound from speakers with no visual damage?
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