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| Re: Standard practice for installation speaker wiring? [message #319797 is a reply to message #319794 ] |
Mon, 05 May 2008 19:38   |
 Hal Bissinger/COMSYSTEC
Messages: 232
Registered: April 2004 |
Has No Life |
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Impedance is basically AC resistance. An impedance meter applies an AC voltage to the device under test rather than a DC voltage like a VOM does. If the DUT is purely resistive both meters will read the same but if the DUT is inductive, capacitive or a combination of both the reading will depend on the frequency of the AC applied and will be indicated as the impedance at that frequency.
-Hal
www.comsystecusa.com
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| Re: Standard practice for installation speaker wiring? [message #320600 is a reply to message #319794 ] |
Wed, 07 May 2008 16:24 |
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Ivan Beaver
Messages: 4362
Registered: January 2005
Location: Atlanta Ga area |
Has No Life |
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| Loren Aguey wrote on Mon, 05 May 2008 20:29 |
| Hal Bissinger/COMSYSTEC wrote on Mon, 05 May 2008 17:05 |
Hmmm, I don't think I see an impedance function on that.
-Hal
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Looks like I need to bone up on my impedance vs resistance terminology. I saw the symbol for ohms, and I thought that was only for impedance. But, it appears thats not the case. Learn something new every day...as they say. So how does that affect my measurements and what they mean exactly?
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In loudspeakers (in most cases-not all) the DC RESISTANCE will be less than the impedance (AC) seen by the amplifier. Sometimes by a little, and sometimes by a lot. You REALLY need an impedance meter to see what the amp is seeing.
All you are measuring is the DC resistance of the wire hooking htem up and the wire inside the loudspeaker.
Can I have some more talent in the monitors--PLEASE?
Ivan Beaver
dB Audio & Video Inc.
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Re: Standard practice for installation speaker wiring?