I installed 2 10w7's (jl audio) and 2 500/1v2 amps, ran it for 2 days, took one 10 and one amp out because it was too much for me. Ran that for 4 days and now the speaker has a really low volume?? I set it up just like jlaudio said, the input sens makes very little difference. I can feel the speaker vibrating and hear it playing sound, but it is extremely low volume. The stock speakers hit harder!! The amp indicates everything is normal.

It gets sound so the RCA cables should be good, theyre a week old!
The amp turns on, has 12v and ground (verified with multimeter), all the connections look okay, I cant really get at the wiring behind the sub without a big pain, but it is working and wiggling wires does nothing, so I imagine they are fine.

I took my head unit out to work behind the dash, and that reset my head unit, but all of the settings are back as far as I know. It plays the frequency ranges it should, but just at a low volume. I have adjusted the high/low input signal switch as well, it just gets lower volume!!

Help is appreciated!
J

 

Check your wiring for the subwoofer and also the gain or boost adjustment. 80mhz for your range is about average for a subwoofer. Low volume on a subwoofer can usually be found as a bad set of RCA's or a wire falling our of the subwoofer depending on if its dual voice coil or not.

 

check to make sure the sub out gains on the deck are good also.

is there a good way to test rcas?
i built my own rca cables and we just did a continuity test with a multimeter and shorted the other end

 

Make sure none of the switches on the amp are stuck in the middle.

 

The switches are good. Im going to check the sub wiring, and also jump in a new rca cable to see if that fixes it. Ill pull the sub tomarrow, its a pain to move. Ill keep you updated.

 

That's probably your problem.

 

10w7 is a single voice coil sub. Ii would check the ground for the amp. Check the power connection under the hood and replace the fuse even if it doesnt look blown. If it's not too much work, swap out the amp or sub or both. Before you do any of that though, what kind of head unit do you have?

 

Yes it is single voice coil. Im checking the wires just in case one is loose or something. I have sound so I know its connected at least slightly. I have a Clarion Max675DVD headunit (its nice) and I have went through ALL of the options, they are all in the same position they were in when it worked before. Im at work right now but when I get home I am going to swap out the rca cables first thing and see whats up with those. I had another 10 but took it out and returned it because it was too loud with 2. Now I wish I still had it to swap in!!
Can anyone tell me the Voltage (Direct current) of the wires to the speaker (with the speaker disconnected) and the input sensitivity turned full down?? If I knew that I could troubleshoot it down to the speaker easily.

Thanks

 

The wires to the speaker (amplifier output) is AC not DC. The amp manual will say what kind of voltage you should get for full power at x ohms. Not sure what to tell you about the gain turned all the way down. Try playing a cd with test tones and measure amp output voltage and turn the gain up and see if it changes or not. Do the same with the RCA cables (unplugged from the amp) and turn up the volume and see if it changes.

 

AC sorry, thats what I meant, obvious because the signal is a wave frequency...

Anyway, if I did the above and checked it with my O-scope, I know the amplitude would increase and decrease with the gain (input sens) knob because I can physically hear it do that when plugged in.

 

Try hooking up an ipod or something directly to the amp with a 3.5mm to RCA adapter and see if that works.

 

Dont have an adaptor like that. I know I have some rca cables somewhere around here. I havent really had time to look into it. A friend at work said I should connect the sub wires to the other channel of the amp and see if thats it, mabye 1 channel is fried. Either way, It should work perfectly its brand new.

 

Do you have your other 500/1v2 amp you can swap out??

The 500/1v2 is a Mono amp so you wont be able to swap "channels" as previously suggested. Although the output of the amp could be what is busted. Head to walmart and get a cheap 3.5 mm to RCA adapter... it helps to narrow things down.