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Re: Car subwoofer issue:
Are the wires connected properly? The SUB may be a dud, do you have warranty. Maybe there is not enough power getting to the SUB from the amp. Is it connected to 2 channels?? It will not play if only 1 channel is connected.
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Fault is either from the main system or the sub-woofer itself.
You need to test both unit in order to detect which of the two is giving the fault, so that you can concentrate on the faulty unit.
Test the woofer with a AA battery or any other battery. Put your ears close to the woofer and observe if you will hear any sound. If the woofer makes sound, then it means the woofer is working, but if it doesn't make sound, then it means the woofer is defective. Or you can disconnect one of the working speakers and connect the woofer to that part. If there is no sound, then obviously, the woofer is defective.
If the woofer seem to be working, then the unit needs to be tested also.
Connect one of the working speakers to the sub-woofer's section of the main unit. If the speaker doesn't bring out sound, check the system's menu settings, check the volume and make sure the sub-woofer volume is raised to the highest level and not on mute. ( Note that most Theater systems has separate volumes for each speakers). If the volume is raised to the highest level and there is still not sound from the woofer part, then it means the woofer channel has burnt. It could be a fuse or a defective channel. At this point, I think you need help from a repairman.
There are a number of issues that could be going on here. Go down this check list.
1. Check to make sure your head unit is getting power
2. Make sure the volume is up and that you do not have the unit on mute
The following list is if you have an amp (I assume you do if you have subwoofers).
1. Make sure the RCA cables are plugs to the correct outlet RCA's on the unit.
2. Make sure the RCA cables are not crimped at any point on the way back to the amplifier
3. Make sure the power and ground are good on the amplifer and that the remote turn on is functioning (this will turn the amp on).
4. Make sure the RCA cables are plugged into the right place on the amplifier.
5. Check the gain levels on your amp. This is a dial next to the RCA input. You will need a small flat head screwdriver to adjust.
6. Make sure the subs are wired correctly. If they are wired to the wrong ohms load they may cause the amp to go into protection.
If this doesn't help, you may need to get more specific in your next post.
Seems like your power amp for the sub woofer may be going into protect mode/thermal overload when you push the volume too much. Therefore it shuts down. I am surprised the speaker hasn't blown yet.
As far as turning car off/on to get it to work, it's as if your car is the power switch.
Amp and speakers may not be wired correctly, as you want to make sure your amp/speaker ohm measurements are within a specific range for the amp and speakers work together properly. You may have it wired for a 2 ohm load, and maybe your amp can't do 2 ohms all day long.
1) Check your power outet - make sure you have power.
2) Check the cord going to sub-woofer, check power strip if using one, we want to make sure you have power going to the subwoofer.
3) If so check to see if you have a fuse installed in the subwoofer, replace if needed.
4) Make sure your audio wires are attached to subwoofer, inspect audio wire, if it is old wire then replace.
5) Trace your wire back to your system make sure it is connected to the Subwoofer terminal.
6) Check your menu options on your audio system, make sure the subwoofer is enabled.
That amp should work fine for that sub, but you should make sure that the amp has a good power system going to it, and the box for your sub is the right one. Either one of those things could cause problems if not done correctly.
Any powered sub-woofer will work with it. Check the back of the Technics, make sure there is an RCA output labeled "Sub-woofer" or "Woofer" or "Sub". If so, you can get any brand of powered sub woofer and it will work. A powered sub-woofer is one with an amplifier for the sub built into the box and you will need to plug it into an A/C outlet as well. The only exceptions to what will work with this unit is to make sure you are not buying a sub-woofer that is made to only work with the companion unit it is originally sold with. Many Panasonic and JVC sub woofers are like this. Just look for a sub-woofer that is not part of any system. Velodyne makes some really great sub-woofers that would work nice with yours, but they can be a little expensive, but they are very good.
If your Technics has no RCA output for the sub-woofer, you will need to make sure that whatever powered sub-woofer you buy has a speaker level input for it. Most powered sub-woofers have this feature, so that you may just run the front speaker outputs of the receiver into the subwoofer and then the sub-woofer will have a set of speaker outputs right below the speaker inputs so you can still have your front speakers connected to that and not loose anything from your system.
I hope I have explained this in a manner you will understand easy, if not just post whatever questions you may have right on this thread and I will get back to you as soon as possible.
It would also be appreciated if you could rate this solution if you no longer need any help from me. If you do require more help, please wait to rate this until we are finished. That way I do not get an undeserved bad rating when we have not even finished our communications. By the way, A "Thanks for trying" and "Helpful" rating are really not good, they always end up lowering my overall score.
Some basic trouble shooting is required here. First you need to see if it is a problem from your source or the sub. Try a different source to the sub-woofer and see if it changes the response. If still nothing on the sub, then most likely there is an issue with the amp or driver. Check to see if there is a fuse on the sub, if so, it could be blown. There could also be an issue with the auto switching circuit on the subs amp, in that case, it would need to be repaired in the shop. But before that I would check all of the connections to the sub, and also to the driver in the cabinet. If everything looks good, then put some type of source directly to the woofer to see if it works, if you get sound, then looks like the amp has a problem. Again a repair or replace issue.
push down on the speaker, does it make a ruff nosie? if so the speakers voice coil is blowin. did ya check the amp to the subs?
could be a lot of things . check the amp make sure it has power,
do u have an in line fuse? if so check that ,to make sure it aint blowin
Enter into the Audio Setup mode(press and hold volume button for at least 1 second). Next, repeatedly push the volume button until the display shows "2 ZONE". Make sure this feature is turned off. Hold the volume button again for at least 1 second to leave Audio Setup mode.
Now you need to make sure the Subwoofer Output is turned on. Do this by holding down(AM position) on the control knob(toggle stick) for at least 1 second. Each time the button is pressed, the Subwoofer Output is turned ON/OFF. the display should show "SW ON".
Next, you can go into Audio Control mode(press but do not hold volume button). Keep pressing on the volume knob until "Sub-WLevel" is displayed. Here you can adjust the amount of gain for the Subwoofer ranging from -15 to +15.