DIY - Protection

This stereo loudspeaker protection will protect the loudspeakers against the switch-impulsions and the direct current component on the output of the connected amplifier. Suitable for: Amplifiers with symmetrical power supply Amplifiers with asymmetrical power supply.

Specifications

Switch-delay: +/- 6 seconds
DC protection: +1V/-1V
Max. input voltage: 200Vpp + DC
Max. switching current: 10A
LED indication for: WAIT (switch-on delay)
and ERROR (DC on speaker output)
Supply voltage: 220VAC
PCB dimensions: 55 x 125mm (2.2" x 4.9")

A very good kit, well designed notice.
To install in replacement of the existing protection circuit, here on the Quad 405.