Subwoofer Cuts off?

Question

I have a older pioneer headunit and got an pioneer gm-5200t amp and a single 12inch 05 Kicker CVR dual 2ohm. This amp is a two channel amp so its bridge and puts out 380watts rms at 4ohms. the gain on the amp is set at normal and the bass boost is at level 6, so when i go to turn the volume up on the radio after 17 the sub tends to cut off and i have to turn the radio down in order for the sub to turn back on. recently i had somebody to look at the amp and they turned the gain up to high causing the amp to melt both fuses, so i replaced the fuses which were 40a and the amp requires 30a and retighting the all the cables on the amp but yet the radio still cuts off when i turn it up. I had a electrician look at it and he said the fuses both of them was lose causing the sub to randomly cut off when i turn off the volume, but this problem was going on way before i burnt both fuses any suggestions

Answer 1

First of all don't use a 40A fuse because is higher than the maximum current allowed to the power inputs of the amp. Allowing more current to the amp than required will cause internal damage or even cause some fire. If the fuses are blown is because there may be a short somewhere along the power line. Check and inspect the power wiring make sure they 're properly connected.

The cutt-off you're describing it may be caused because your gain is too high or the speakers have an impedance too low causing your amp to overheat and draw more current. The overheating sensor circuit is activated preventing the amp to operate until it cool down to normal temp. Check you speaker wiring for the correct impedance.

Go to this site for wiring diagrams:

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http://crutchfield.custhelp.com/cgi-bin/crutchfield.cfg/php/enduser/std_adp.php?p_faqid=2259&p_sid=j6DZ9ayi&p_lva=2727&p_accessibility=0&p_redirect=&p_sp=cF9zcmNoPTEmcF9zb3J0X2J5PSZwX2dyaWRzb3J0PSZwX3Jvd19jbnQ9MTgzJnBfcHJvZHM9NDY5LDQ3MCZwX2NhdHM9JnBfcHY9Mi40NzAmcF9jdj0mcF9wYWdlPTImcF9zZWFyY2hfdGV4dD1zdWJ3b29mZXI%2A&p_li=#

Answer 2

Sounds like all the symptoms of a short in the power wire to me man. If an electrician looked at it and fallowed the positive wire from the amp all the way to battery and didn't see any short them I'm surprised. It has to be a short in the inside of the amp I would assume then. If it works sometimes then sell it to someone and show them that it works lol. Another thing to look at is the super thin blue signal wire to your head unit. If you have fold down seats or anything like that they can strip very easily and cause a short. A sure fire way to rule this idea out is to rewire everything that goes to the amp with new wires (what I always do when I don't know whats going on) works every time.

Answer 3

Are you certain that the sub has its voice coils wired in series for a 4-ohm load, and not in parallel for a 1-ohm load? Connecting too low an impedance to a bridged amp like yours could cause the problems you're describing.

Other possibilities are a poor ground connection, loose connections at the battery, or a problem with the fuse or fuse holder on the power wire near the battery.

Answer 4

whilst the LOC is expounded does your subwoofer amp activate? did you hook each thing up on the sub amp properly (means, floor, distant cord)? The intereior audio equipment no longer taking part in sounds strange to me. i've got in straightforward terms put in a LOC as quickly as in my sisters motor vehicle. once I did it nevertheless I pulled out the stereo and spliced into all the speaker wires somewhat of basically employing the rear ones. i could verify the learning to in straightforward terms remember to are hooking it up properly and which you aren' probable crossing any wires or something. it ought to be that throughout straightforward terms employing the rear audio equipment places too lots of a load on the headunit so as that it does not play out of those channels. yet it is in straightforward terms a wager.

Answer 5

If the fuses got hot enough to melt, perhaps the solder points melted and caused a bad solder joint.

Answer 6

yoy can put a swich in the dash of your car/truck and trun the volume up to 17 and turn the swich on and see if the radio turns if it does you can find somebody to take a look at it
if it doesn't than all half to do is leave it hook up.

Answer 7

Gm-5200t