User Guide

Sound System Design Reference Manual
7-21
For a stereo system, we would need one
DSC260 digital controller for frequency division and
other signal processing.
Subwoofer requirements can be met with four
(one in each corner) JBL 4645B systems. Drive
requirements would be two MPX1200 amplifiers and
one section of a DSC260 controller. The amplifiers
can deliver 800 watts continuous power per channel
into 8 ohms. With their half-space reference
efficiency of 2.1%, the four subwoofer systems can
produce a total power of 60 acoustic watts.
Figure 7-18. Social area system, signal flow diagram.