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You can do a quick test with speaker wire. Run a quick 12 volt positive and negative from the battery to your amp. I would simply place the amp on a table next to the car. Hook up a 12 volt positive to your amp turn on. Turn your gains down all the way. If you have a portable walkman, ipod, or cd player then plug a minijack to rca adaptor into the headphone jack. Turn on the portable device and it will output under one volt at max volume. Most are in the milliamps. Your amplifier will have voltage sitting idle at this point. Its consumption will be roughly under a amp with no load (that means speakers) on it. Your speaker wires are going to be able to pass the voltage. It is the high amperage associated with a speakers consumption that will cause it to fry. Place a multimeter on the speaker leads and set it to ac voltage over 100. If you aren't getting any reading, then increase your gains and portable device volume. Check all speaker setts. They should read very close to the same reading. The actual votage will vary greatly due to the amps RMS potential, input voltage of the source device, and gain setting. Just be sure to secure the temporary wires so that they don't fall and short anything out. The last thing you want is to have the power wire hit your amp case and ground.
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Quick Amp check?
Linear Mode
