Question about Alpine PDX-1.1000 1000W x 1 Car Amplifier Car Audio Amplifier

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Alpine pdx-1.1000 I have a pdx 1.1000 and a pdx 4.150 the 4.150 is running 2 6x8 components and 1 6.5 component set. the 1.1000 is running 4 type s 10" subs. the power wire from the battery is 4 awg with an 80 amp fuse run to a fuse block the amps have 10awg wire run to them. when it turns on it plays fine but if i turn it up and a hard bass note hits the 1.1000 amp cuts off. if I turn everything off and back on the amp comes back on. why is this and what should i do? should I change the 4 awg wire to 2 or 0 awg and 4 awg to the amps like it says in the manual? and if so what size inline fuse do I need and the battery? the battery is stock would an optima yellow top help stop this issue? thanx.... brian

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  • Briankt69 Apr 21, 2008

    I rewired my amps using Fosgate 0/1 awg power wire with a 300 amp inline fuse at the battery. This travels to a 10 farad digital Voodoo cap (which is grounded with 0/1 awg). Then to a Fosgate fuse block with a 60 amp fuse for the pdx 4.150 and a 100 amp fuse for the 1.1000, followed by 4 awg wire for power and grounds to the amps. Everything seems to be fine now. I plan on very soon going ahead and changing the stock battery with a Kintek HC2400 if it fits. Their website recommends a HC1600 based on my RMS wattage plus another battery by the amps. But I will just change the stock battery out and that is it.
    I was thinking about an Optima yellow top because I have seen them used for many years in car audio installs in magazines but upon farther research alot of people are saying that the Optima's are not the best chose because they are a deep cycle battery and that the Kintek's are the best way to go. What do you think?

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Hello Briankt69,

Ot two issues, First the AMP is going into a protection mode this means that it is drawing too much current. As netrecov said you need a capacitor, this will oppose the rapid current draw, by allowing the voltage to remain constant. However I would also sugget that you rewire the setup to manufatures specification and make sure that all grounds and supply leads are installed properly. Taking into mind the the 4awg wire has less cross sectional surface than the 2 or 0 AWG wire causing it to have more resistance this is power loss in this case (follow the specifications).

I hope this helps

Thank you,

Shuttle83

Posted on Apr 21, 2008

  • Henry McKelvey
    Henry McKelvey Apr 22, 2008

    Hello If this setup is drawing a lot of current, you may want to consider adding an extra alternator and battery to make up for the extra current requirements. My suggestion is not to use deep cycle batteries because they are made to provide a steady amount of current over a long period of time and are meant to be deeply discharged, as opposed to normal car batteries which are maed to provide for surge currents (like you are exposing the battery to). Again my suggestion is to install an additional alternator, battery and voltage reg.



    I hope this helps



    Thank you



    Shuttle83

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What is happening is the amp can draw the current. u need a capacitor

Posted on Apr 21, 2008

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"1. Does your amp have a high input port? This is where instead of RCA's you feed it speaker output from your head unit?
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