Join Date: Feb 2007
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Not sure, could be a cable. How many amps does your Amplifier, speaker, headunit pull all together? Find out how many amps your Batt can produce. Your system might be pulling too much wattage too.
Just ideas mate that's all. I wouldn't want to say for sure without seeing it and measuring bits with a multimetre. It might just be cables but I don't know. It would be cheaper to try a bigger earth cable or something first anyway. Don't think it matters what size it is. the more the better but you wouldn't need a big chunky one that's for sure. Not IMO anyway.
Currently in Mike11's garage:
An LPG powered Ford Focus ST170.