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Message: <blockquote data-quote="Jepalan" data-source="post: 8180828" data-attributes="member: 655519">I always try to use manufacturer's recommended sizes, but you can calculate minimum wire sizes using this tool: <a href="http://www.bcae1.com/images/swfs/systemdesignassistant2.swf" target="_blank">http://www.bcae1.com/images/swfs/systemdesignassistant2.swf</a>Use the white entry boxes and set wire length to 17ft and amp power to 500w rms each (conservative) and it comes up with: 2awg to distro block and 6awg to each amp. (set two of the amps to 0 in the tool)Assuming you don't run amps to max, set amps to 300w and it gives one 4awg to distro-block and 8awg to the amps.  At least that gives you some confidence in ranges. As you can see the manufacturer recommendations are pretty conservative (esp the dual 4 awg connects on the GT amp).Tool assumes true gauge copper wire - nothing fancy</blockquote>

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