Question about Clarion APX1300 Subwoofer Mono Amp - 300W Class AB 400W @ 2 Ohms Bass Extender Circuit Car Audio Amplifier

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Amp doesn't come on

My Clarion APX1300 amp was powering my 2 12" MTX subs, then the other day it just stopped working. Went behind head unit and everything is still connected, checked the fuses and they are ok. Unhooked my subs for a couple of days and noticed that my amp was coming back on. So I took my subs out and gave them to my GF since her subs didn't work anymore and the subs work fine in her car. Just bought some 10" Visoniks to put back in my car. Now the amp won't turn on again. Any answers?!

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  • rheabarb May 20, 2009

    I actually unplugged the speaker wires and the RCA wires after I wrote that. The amp power on light will come on for about a second after the car has sat for a while, but then shuts off. When I try to shut car off and put back into the on position the amp will not light up at all. So yes, even after I unplugged the sub and RCA wires, it still would not work. It had worked perfect for almost a year that I have had it, then the other day nothing!

  • rheabarb May 20, 2009

    Also, is that amp ok for the subs I have now? I just purchased two 10" Visonik V105PR. 250W RMS each and 500W Max each. Single 4 ohm Voice coil. If not, what are some choices on amps that would work best and also under $100? I prefer Mono amps, but any would do. Thx

    BTW, the amp was powering 2 12" American Pro VS412.


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Hello rheabarb,

You did not say whether or not you checked the wiring going to your subs. Many times, a shorted or grounded speaker wire will cause an amp to fail. And if the amp powers up OK with the subs disconnected, I'd suspect one or more of the wires.

Hope this helps.

Posted on May 20, 2009

  • Ronny Brite
    Ronny Brite May 21, 2009

    Hello again rheabarb,

    Well, if all of the wiring has checked out OK, then I'd have to suspect a problem with the amp itself. If you have had it for less than a year, it should still be under warranty.

    The amp is rated at 400 watts RMS into 2 ohms so your Visonik 10" subs would be OK wired in parallel.

    As for amp choices, there aren't many monoblocks available for under $100 that will produce the power you need. The least expensive sold by Crutchfield is the Orion Cobalt CO500.1 at $139.99. About the only ones for under $100 have names like Boss, Hitron, and Lanzar. And your other stuff, the Clarion and Visonik are in a little higher league. It's not JL or Alpine, but it's good equipment. For another $10, also at Crutchfield, you could get a slightly higher powered Kenwood, the KAC-6104D. But keep in mind that Kenwood is not CEA2006 compliant and their published figures may be inflated. If it were me, I'd spring for about $50 bucks more and get the Alpine MRP-M500. Alpine is CEA2006 compliant.

    Hope this helps.


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