【 Weak current College 】 speaker cable choice---Power By 【 China power house network 】

Audio enthusiasts on loudspeaker cable choice greatly, have heard there are some people spend some buy a line. Loudspeaker cable of the other extreme is to grab one wire connected to the voice on the line. Let us leave the two extremes, from a technical point of view the loudspeaker cable choice. Fine wire obviously no good results, because the thin line of resistance, the more power is consumed in the conductor resistance losses on bass. Too thick wire while resistance is small, but the resulting materials and waste of money. Usually considered conductor loss (insertion loss) is the following 0.5dB tolerable. The output from the amplifier to the speaker of this part of the circuit, the speaker impedance, the length of the wire, wire-weight are important, the general practice is based on wire length and speaker impedance to calculate the thickness of the line.

The following figures show 100 feet (30 meters) of the conductor diameter, speaker impedance and insertion loss. For example, 30 m, 4 Ohm impedance speakers, insertion loss is enough 2.5dB,. We all know, 3dB loss means loss of power amplifier output in half!

10AWG:4Ohm=.44dB,8Ohm=.22dB,16Ohm=.11dB
12AWG:4Ohm=.69dB,8Ohm=.35dB,16Ohm=.18dB
14AWG:4Ohm=1.07dB,8Ohm=.55dB,16Ohm=.28dB
16AWG:4Ohm=1.65dB,8Ohm=.86dB,16Ohm=.44dB
18AWG:4Ohm=2.49dB,8Ohm=1.33dB,16Ohm=.69dB