Electronics > Projects, Designs, and Technical Stuff
Speaker Wire and Calculating Guage
DW1961:
--- Quote from: Bassman59 on July 23, 2020, 12:17:12 am ---
--- Quote from: DW1961 on July 22, 2020, 08:05:16 pm ---The run is 24' one way.
It's just a home system with RM51 Klipsch speakers and a Chinese D amp rated at 100 watts RMS at 4 Ohms. The Klipsch speakers are SENSITIVITY 93 dB @ 2.83V/1M. So that really helps.
--- End quote ---
Sensitivity just tells you the output you can expect to get for a given power input. Higher sensitivity speakers are more efficient. But it's not interesting for sizing wires.
--- Quote ---I never exceed 50% power level on the D Amp, as I mainly listen to Jazz at lower levels (I set the Amp at 50% then adjust the volume from my computer software So if I turn up the software volume to 100% the Amp is doing 50% power. I should probably turn it up to 80% and use a lower software volume, but I don't know if that matters or not.) The Amp uses the Texas Instruments 3116D amp chip. Since the speaker are 8 Ohms I'm only getting 25 Watts per channel, unless I misunderstand power and Ohms. Still sounds good for my needs.
--- End quote ---
A "reasonable" way to set levels is to run the software level at maximum and then set the amplifier to "somewhat louder than you'd ever listen to it." Then you can use the software controls to set the computer/whatever output level to whatever is comfortable. This way, if the computer went wonky for some reason, the level won't blow your ears or your speakers.
--- Quote ---If this is correct below, then even with CCA wire, I should be golden:
"Russel is saying, "It was based on the resistance of the speaker wire not exceeding 5% of the rated impedance of the system. The wire length is for TWO-CONDUCTOR wire. This includes one wire out to the speaker and one wire back again."
So .05 * 8 = 0.4ohms
But if 16AWG is only .004ohms per foot, you could run 100 feet total wire and still meet his requirements? And that would mean his statement is 48 feet two wires one way?"
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You're still waaaaaaaay overthinking it.
The losses in the wire for the short distance you describe is not going to matter. I mean, you're not using 30 AWG wire-wrap wire for this, right?
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"A "reasonable" way to set levels is to run the software level at maximum and then set the amplifier to "somewhat louder than you'd ever listen to it." Then you can use the software controls to set the computer/whatever output level to whatever is comfortable. This way, if the computer went wonky for some reason, the level won't blow your ears or your speakers."
Yeah, definitely, I think I will do that.
"You're still waaaaaaaay overthinking it.
The losses in the wire for the short distance you describe is not going to matter. I mean, you're not using 30 AWG wire-wrap wire for this, right?"
Yeah, but I want to know how to calculate it myself. That's the point of starting the thread. And no, I'm suing 16AWG Amazon CCA wire.
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