[Vintage-Audio]V40#15- BIG Wire

[michael salmons]

I've already let the cat out fo the bag regarding my slack attitude  
toward wire... but I can say I have used coax for speaker wire before  
and found it to be perfectly satisfactory.

Then again, I use LAMPCORD <roll eyes>...

Just joshin.

Michael

On Nov 28, 2007, at 5:20 PM, Phil Barnes-Roberts WA6DZS wrote:

> vintage-audio-request at mailman.qth.net opined  on 11/28/2007 01:03 AM:
>> --------------------------------------------------------------------- 
>> ---
>> Subject: Re: [Vintage-Audio] Re Speaker Wire Options
>> From: "wolfbob" <wolfbob at csnsys.com>
>> Date: Tue, 27 Nov 2007 19:29:40 -0800
>> To: "Vintage home and professional audio equipment from 1975 back"  
>> <vintage-audio at mailman.qth.net>
>> Duane.
>> I said it before and will always say it. USE BIG WIRE. Think of  
>> Ohms Law a minute. If you are running 20 watts into what is  
>> probably 4 ohms (at 50-100 Hz into a big speaker. They are 8 ohms  
>> or so at 1000Hz) you will have about 9 volts across the speaker  
>> and will be drawing about 2.5 amps. Now if your speaker wire has  
>> 0.5 ohm of resistance you will loose 1.25 volts or about 2 dB of  
>> bass. You can easily hear this loss. If you don't believe me run  
>> your #24+ wire and in parallel run some #14 or #12 and do an A/B  
>> test and play your bass singer. He will fade into the background.  
>> I have #14 speaker wire ala RS running to all my speakers. Things  
>> get much worse if you are punching those JBLs with some real  
>> peaks. They just won't be peaks anymore as the IR losses eat away  
>> your great audio.
>> WBob
> Hi, Guys (&Gals)--
>
> Not having run across #24 'Speed Wire' I'll have to pass on it;  
> sounds like phone-closet twisted-pair stuff, though, or doorbell  
> wire.  Light.  Way light.
>
> You've reminded me of something K8EBR, Tom Pierce told me one day  
> in the EMC Lab at JPL, that agrees with Bob.
>
> If you really want 8-ohm-impedance pair wire, get some (surplus?)  
> RG-11/U coax (stored indoors is best, so we'll hope it's  
> uncontaminated with the jacket plasticizers after years in the sun,  
> or on the shelf).
>
> Ignore the center conductor, and tie-wrap two pieces of this half- 
> inch-or-so coax together along their length.  That size conductor,  
> jacket and spacing is supposed to come out to eight ohms.  Twisting  
> together (obviously, not very tight) helps cancel out fields over  
> the length of the run - with any pair.
>
> You'd probably have to skin back jackets and braids, remove some  
> center conductor and inner poly insulation, and twist the two  
> stranded braids into a pair for your connections.  A monster  
> indeed!  Anybody hear this one before?
>
> -- 
> '---O=o=O---'
> 73, Phil Barnes-Roberts WA6DZS < Mailto:pbarnrob at acm dot org >
> "When you are trying to get a handle on a big decision, try looking
> at it like this; 'What kind of world do I want to live in?'"
>  --Ann Bodenhamer Martin, author of /Calico/ /Families/
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