Rerurn to Romy the Cat's Site


In the Forum: Horn-Loaded Speakers
In the Thread: Deep End DIY - Australian take one Macondo.
Post Subject: I do not think so....Posted by Romy the Cat on: 10/3/2017
 anthony wrote:
I've just done some calculations for power loss versus cable gauge and I think that with that length of cable that I would be best off with as low a resistance as possible.  It seems to be an absolutely overriding factor.  If my calcs are correct an 18 gauge speaker cable would burn 4dB or 5.5watts and into 1R the 6C33C grid clips at about 9watts...that's half my power gone just by using an undersized cable plus it really destroys the damping factor.  6 gauge wire on the other hand will burn 0.64 watts or about 0.32dB and keeps the damping factor largely intact.

I am sorry. I am not familiar with this calculation but I think your number a bit ridicules. You are saying that a speaker cable burn 4dB of a signal? A typical wire of 18ga has around 5R resistance but it is per 1000 feet. If you have 3 feet of cable then the resistance of your cable truly negligible. I never factor in the “cable burn” in whatever I do. Perhaps I was wrong …

Rerurn to Romy the Cat's Site