What is the Protection Circuit switch for on the rear of the speaker selector?
To compensate for low impedance that results from connecting multiple pairs of speakers to the selector box. The protection circuit adds 5 ohms to each channel to guarantee a final load impedance that will be greater than 5 ohms at the amplifier. If impedance-matching volume controls are used in the system, the protection circuit should be set to the “off” position, since the volume controls will be configured to provide low impedance compensation. It is also important to note that a speaker selector’s maximum power handling is reduced with the circuit protection switch in the “on” position.
Related Questions
- If an ISM/DSSM speaker selector is used with impedance-matching volume controls (VMT100/VSL125 IM), should the protection circuit on the speaker selector be switched on or off?
- What is the Protection Circuit switch for on the rear of the speaker selector?
- What does the vertical switch on the rear of the AutoProm do?
