I have a mono alpine pdx 1.600, When is on low, its good, But when you turn up the volume, and keep it high, it will cut out after a a couble seconds, The sub can hold 500 watts, and the amp is capable of seding 600 watts. The mono is hooked up to a capacitor whitch is hooked up to a four channel amp, Could the ground be the problem?
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No. It is optimized to deliver 600 watts onto either 4 or 2 ohm loads but will decrease to 300 watts into 8 ohms. However that equates to only about a 3dB difference in output level from the sub. 3dB is the smallest amount of volume difference the human ear can pick up. A doubling of volume requires a9dB increase which requires a tripling of input power.
Go to rockfordfosgate.com they have a woolfer wiring wizard that can help you make sure your amp is under the correct ohm load, if your woolfers are wiring up on a 1 ohm stable load the amp will overheat and go into protection mode and cut out.. Need the woolfers on a 2 or 4 ohm stable load, and the amp should run fine with a capacitor, and some good 0 to 2 guage cable, plus a good battery and alternator to feed it
Make sure there's no missmatched impedance. If your sub running 2 ohms then your amp has to be 2 ohms stable. Does the amp blow fuses or get really hot? If it does it can be a fire hazard and I would recommend taking it out of your car. It could be that you don't have sufficient grounding. The grounding needs to be very close to the amp and the paint needs to be thoroughly scratched off. Otherwise could be a blown transistor within the amplifier, you can check this by opening up the amp, running a multimeter and testing the transistors for resistance.
You are going to want to make sure all your power wires and grounds are 4 gauge as well as the wire leads to and from the capacitor-4 gauge also. make sure you have a very good ground - the power wire from the battery should hit a distribution block-from the dist. block a 4 gauge should go to the capacitor another 4 gauge to the mono amp and another to the 4 channel amp -every component should have a good solid ground even if you have to bust out a grinder and a drill and some self tapping sheet metal screws and go nuts on it- see if that helps you