I have installed the jensen vm9312 hu in my cadilac as well as 2 L7 12's and a 1500.1 kicker amp. I have done car audio for years and know alot about it but this has got me puzzled. Everything works properly and everthing is hooked up right but I am getting no sound from subs, I took them out put them in another vehicle they work perfect but reinstalled them in the cadilac and still no sound? I dont know if it is the hu sub output or something that I do not know about I see that other people have had the same problem with this hu any suggestions?
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Re: No sound from subs
Have searched and searched and found out a few things about this HU. One question for you. Are you powering your subs through 1 amp and if so what amp is it?? Firstly the sub output only goes from 0 to -14 which isn't very loud. Secondly, there is one write up of a guy that says, "Hi i also own a VM9312, and the way you make the sub louder is by turning it off. To do this, you go to settings, then go to audio, and turn the subwoofer OFF. This is really weird, but it worked for my unit." Sounds strange but worth a go. And have you got the brake override working. If you need instructions and code give us a shout. Sorry I can't help anymore at the moment.
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If the whirring noise goes up and down based on engine speed then it is a weak ground connection. Also, if you have amps (I have a Kicker mono-block running a cheap MTX 2 by 10" subs,and Kicker 4 channel amp running 4 kicker speakers). I promise I won't say "Kicker" one more time!
I have a whirring noise too just like yours. There are a lot of electronics and wireless devices in modern cars these days that are going to interfere with your audio electronics...especially cell phones operating through the audio system. I can't stress that enough. Cell phones operate through powerful towers which is why they can be so tiny. As you talk the whirring will go up and down based on Tranter level and distance to tower. Hope this helps. I have 1000 watts, so it tends to drown out any minor whirring. LOL.
First of all, find out whether that ground wire is fastened to metal. Next, with the RCA cables disconnected, try to get the amplifier to turn on. If no luck, could there be a fuse for the Kicker that may have blown? Finally, go back over the installation. A connection may be failed or grounded.
this could be due to a couple of problems but the most commen one is the layout of the wiring. the RCA cables coming from the radio to your AMP are probably routed with the 12v cable coming from your battey to the AMP so as you drive along it interfeers with the RCA cables. run the 12v cable down one side of the car and all the other cables down the other side. if this is not your problem it might be due to a faulty altenator which is overcharging and needs to be replaced. a temporary solution could be a noise filter.
read ther link below for more indepth detail on noise filters.
Melted voice coil? Short circuited voice coil due to overload? does your amplifier work properly? Is the (-) properly grounded? If the SUB is in working condition and there is nothing wrong with the amplifier. 1) The amp is not powerful enough to run the sub 2) The amp is not properly grounded or powered 3) Remote Sensor wire is not connected 4) RCA Cables or Hi - input sensors are not connected Check out the installation to verify or the sub may be damaged
if your sub isnt blown, i'd follow your own idea and look for a bad wiring connections, also what kind of head unit do u have? check the settings on ur head unit to see if there is a seperate setting for your amp/subs if it does have one, make sure it is set properly
if it does not have a setting like above, check the rca cable from the radio to tthe amp, and make sure that the rca cable is plugged in to " input instead of the output
Hello Brian, I have done a search for the Jensen KA-4400 Amplifier manual, without any luck. Sorry. However the following might be useful for you to continue the search: (1) Jensen Customer Support: 800-732-6866 (2) Go to: http://caraudio.manualsonline.com/manuals/mfg/jensen/jensen_car_amplifier_product_list.html (Be careful to copy ALL of the URL address). Then click on "Ask the membership for help locating your Jensen Car Amplifier manual"at the bottom of the screen. Then fill in the form. Good luck.
Yes you can replace your factory oem stereo with an after market stereo or replace it with another oem. I have a 2002 Maxima and I can't stand the BOSE system so I ended up replacing the head unit and added an amp to run my sub. Sounds great and did the install myself. Took me about 3 hours total. Find the head unit your like and see how much a shop would replace it for? Or you can do some research and do it yourself. It really isn't hard as it would seem!!! Since replacing the HU the sound is much much better!!!
With a single 4ohm DVC sub there are only two possible wiring solutions, parallel the voice coils for a final 2ohm load or series the voice coils for an 8ohm load. In your case, you want to wire them in parallel, both positives and both negatives connected to the amp terminals.
Here are the diagrams: (-) to (-) and then to the amp - (+) to (+) and then to the amp. Impedance = 2ohms.