Chris Cronin |
A Device to Determine Sound System Polarity |
Maintaining the same polarity among several speakers is absolutely critical to the successful performance of large-scale public address systems, musical reinforcement systems, page/monitor systems, and the like. The circuit described in Figure 1 provides a reference signal to the input of a sound system, and the circuit described in Figure 3 decodes that signal as it comes from a speaker, indicating whether polarity through the system has been maintained or reversed. Commercial devices cost upwards of $350, but this device can be built for around $30.
FIGURE 1: THE IMPULSE GENERATOR
Get Technical Design Solutions for Theatre now with the O’Reilly learning platform.
O’Reilly members experience books, live events, courses curated by job role, and more from O’Reilly and nearly 200 top publishers.
