I have a alpine v12 mrv-t707 amp that i bought used and just installed. the wiring is correct as i have installed a couple amps before. when power is conected the green led comes on and some smoke billows from internally. it has the smell also. the green led comes on even without the remote wire connected. i am using smaller fuses to test it as i dont want to do too much damage in the troubleshooting process. what could the prob be? can you help!!
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Re: no sound and some smoke
If you got smoke comming out its already has damage my friend.. Was this unit bench tested before you bought it or was it hooked up in another vehicle and you seen it work or did you buy it sight unheard??
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The "CUR" display means that the amp is drawing excessive current and the protection circuit is activating. Too low impedance or shorted speakers will cause the amp to draw excessive current.
The Alpine V12 is a Class D mono amp with only one set of speaker outputs. All versions, M301, M501, and M1001 are only stable to 2ohms. Assuming that all 6 of your connected subwoofers and speakers are 4ohm and they're all connected in parallel, the amp sees a .67 ohm load, far below it's rated impedance.
When brand new, the amp could probably operate at low to moderate volume levels without drawing excessive current. But as electronic components age, their tolerances change and they become less able to withstand excessive current or mismatched impedances.
I'd get a 4-channel amp and drive the 4" speakers off the front channels and the 6X9's off the rear channels. And just power the subs off the V12 making sure that they are connected to show a minimum load of 2ohms.
its your fuse box. i would bypass the fuse box and wire this amp directly to the battery via monster cable. make sure you attach a 30wieght fuse to the monster cable that is running from the battery to your amp. ground the amp against the trunk. scrape the paint of a section and drill a hole in the trunk. use this for the ground for you amp. this will fix the no power issue.
"how do i made amp ohm instead of 4" What? I think you're asking how to make the amp 2 ohm. If your 12's are already wired for 2 ohm, just connect the 2 leads to the bridged terminals on the amp. There will be 4 connections on the amp. One for each channel. Usually, the two outside terminals (one positive and one negative) are the bridge and it'll be noted with a line painted on the surface above the terminals. That's all you have to do. If it is overheating, you should put cooling fans on it.