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Crap speaker cables |
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Dave Friday
Senior Member Joined: 07 Apr 2011 Location: Spain Status: Offline Points: 173 |
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One of the quality speaker cable spec is 0.0074 ohm per meter.
I must check the cables in my main system! One of my co-engineers in a TV rental company was tracing a fault ( frame bounce) with a Avominor meter,when he put the probes in a certain spot the fault stopped so he looked at the ohms per volt on the meter found a resistor of the same value and soldered in place! Job done. Ps,I had subtracted the .3 ohm
Edited by Dave Friday - 15 Feb 2019 at 12:07am |
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lp12,oc9mk3,ca610p,krimson40watt pa,kef105.4
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Fatmangolf
Moderator Group Joined: 23 Dec 2009 Location: Middlesbrough Status: Offline Points: 8960 |
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You will not be able to accurately measure the lumped characteristics of a cable with most models of DMM but it will identify a gross fault like a short, open circuit or poor connection. A more specialised device like an LCR meter would be needed to get the measurements Chris rightly suggests for quality speaker cables. |
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Jon
Open mind and ears whilst owning GSP Genera, Accession M, Accession MC, Elevator EXP, Solo ULDE, Proprius amps, Cusat50 cables, Lautus digital cable, Spatia cables and links, and a Majestic DAC. |
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Dave Friday
Senior Member Joined: 07 Apr 2011 Location: Spain Status: Offline Points: 173 |
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Thanks Jon,as you rightly point out my dvm only reads to 0.1ohm ( how did you know?) so at the very least I need a milli ohm meter,one that reads to 0.000 ohm .
I know I made a capitance meter thingy but I don't know if it did inductance as well ( have to find it ) What LCR meter did you buy? Ta.
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lp12,oc9mk3,ca610p,krimson40watt pa,kef105.4
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Fatmangolf
Moderator Group Joined: 23 Dec 2009 Location: Middlesbrough Status: Offline Points: 8960 |
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Hi Dave, I got a DM4070 off Amazon, it was about £25 at the time. Basic but does the job I needed, I think it goes down to tens of milliohms on the lowest scale i.e. 0.01. I do take the closed loop reading off when using the test leads. It's worth remembering that the DC resistance of each speaker crossover inductor will probably be 0.1 ohms or over. I have found an LCR meter quite handy. To buy one I suggest searching for LCR meter then compare specs to price for the better reviewed models. The materials and construction are as significant as the lumped characteristics IMO. |
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Jon
Open mind and ears whilst owning GSP Genera, Accession M, Accession MC, Elevator EXP, Solo ULDE, Proprius amps, Cusat50 cables, Lautus digital cable, Spatia cables and links, and a Majestic DAC. |
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