Rather long Speaker wire lenth vs Gauge

Printed From: the12volt.com
Forum Name: Car Audio
Forum Discription: Car Stereos, Amplifiers, Crossovers, Processors, Speakers, Subwoofers, etc.
URL: https://www.the12volt.com/installbay/forum_posts.asp?tid=56315
Printed Date: April 28, 2024 at 1:09 AM

Topic: Rather long Speaker wire lenth vs Gauge

Posted By: robb420in323
Subject: Rather long Speaker wire lenth vs Gauge
Date Posted: May 23, 2005 at 8:40 PM

Hi everyone. I was wondering how thick of speaker cable should I use for a 55Ft run..

The load will be 225watt Max @8 ohms

Thank you in advance.. I looked thru all the calculators. but i couldnt find the speaker table.

Robb

-------------
Hunter S. Thompson for sheriff

Replies:

Posted By: stevdart
Date Posted: May 23, 2005 at 10:01 PM

Use Ohm's Law to find amperage I = sq rt (P / R ). 225 / 8 = 28. The square root is 5.3. So 5.3 amps is the current the wire has to be able to carry. Not much, due to the high impedance and low wattage.

Here's a great calculator for that. You can see that with using 16 gauge wire the decibel loss is less than half a decibel, which is an inaudible result.

-------------
Build the box so that it performs well in the worst case scenario and, in return, it will reward you at all times.

Posted By: sedate
Date Posted: May 23, 2005 at 10:10 PM

55ft run? What? are you doing?

-------------
"I'm finished!" - Daniel Plainview

Posted By: Poormanq45
Date Posted: May 24, 2005 at 9:42 AM

For that long of a run go down one, possibly two for safety, guages.

To be safe I'd go with 12awg

-------------

Posted By: Francious70
Date Posted: May 24, 2005 at 9:50 AM

....audioholics.com/techtips/audioprinciples/interconnects/SpeakerCablelength.php

Paul

Posted By: DYohn
Date Posted: May 24, 2005 at 9:51 AM

Stevdart is correct. No need to use anything larger than 16 AWG.

-------------
Support the12volt.com

Print Page | Close Window