I recently hooked up an 110v2 to a nine 2 amp. Everything was working good. I set the gains with a multimeter so it was running 400watts bridged. I just installed an alpine headunit and it still worked. I just realized tonight it wasnt working so i took a look at everything. I test the amp with the multimeter and the voltage never seemed to change. The multimeter might be bad, but the sub would barely make any noise unless the gains were up really high, like unsafe high. And even then it was very quiet. Everything is hooked up right. No fuses are blown. What could the problem be? I just bought this stuff in october it cant be messed up. What do you suggest? Thank you for your help

 

did you check the fuses


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Check the ground cable...thats all I got.

 

I have never been a fan of checking amp outputs with a meter. Have you used the meter to test the impedence of the woofers?

Also, did the battery get replaced or has the battery been dead? You might need to turn on the sub output again.

 

I checked the ground and it looks good. I wired the sub up how to book told me to wire for 4 ohms. And 3 months ago when i installed the sub i did check with the multimeter and it said four. What happened is yesterday i had been at a car show with the stereo playing for probably 2 hours, then i got home and was messing around with the differant functions on the new hu i put in. I noticed the sub didnt sound like it was working at all. Went to the trunk and it wasnt. So i messed around with headunit trying to figure this out and how to fix it. And then the battery did die and i had to jump the car. I said f it and went inside. Not to mention the multimeter is ****ing worthless it was reading all kinds of random numbers and when checking the gain on the amp it would even read over 1 volt with the gain cranked, when it should have been 40. I tried adjusting the gain just by the sound to get the sub to play a little louder but once the sound became audible the gain was too high and the amp went in protect mode and shut everything down. The sub should have ben safe at 400 watts because its rated 500/800. Idk what the problem is and I dont want to take it somewhere to get it looked at.

If it helps, for the HU i hooked the remote wire for the nine.2 amp, both of the turn on wires for the mach 460(with the resistors), and one wire from a trigger switch to bypass the parking brake. Theyre all spliced in about a 1/2 inch apart at the end of the remote wire from the headunit.

 

again, a meter is not a good way to test the output of an amp, especially if you are expecting over 40[:-]....

What functions on the new deck were you messing with? When I loose power on my deck my alpine resets all of its settings so I have to go in and turn the sub output on.

Have you tested the subs to see if they are blown after jamming them?

 

My Alpine headunit has the Subwoofer on/off settings then 3 different sub setups and then you can adjust the bass and subwoofer levels. Also theres a Power IC mode that just turns the sub on and cuts power to the speakers.

 

I was messing with the subwoofer volume(didnt do anything) frequency, and some function that adjusted all the speakers/sub from -12db to +12db and i couldnt really get it to sound any differant thats when i went out back and checked it out and the sub was hardly moving at all.

 

Make sure your ground is mounted to a solid part of the frame and sand down any paint that is there.

 

yea ive already done that all the wiring is fine its worked perfect with a loc for about 4 months now that i installed the alpine im running into problems