ABSTRACT
This chapter explores about the technical stuff. It is worth taking the time to understand the key concepts and terminology involved. Because loudspeakers have low impedance, typically between four and 16 ohms each, it is essential that the cable used to connect them has an extremely low resistance. Normal speech in a quiet room falls into the 40 to 60dB SPL range, while roadside traffic noise might be as high as 80 or 90dB Sound Pressure Level (SPL). Speaker cable must provide a low resistance path between the amplifier and the loudspeaker, to avoid power loss and a reduction in damping factor. Damping factor is the output impedance of the amplifier divided into the impedance of the speaker connected to it. The chapter concludes that to use the heavy-duty speaker leads that are practical, and use good quality, low resistance connectors.
