FS: Couple of SSR DC speaker protect modules
2 off speaker DC protect modules.
Solid state relay.
Power up detect with four second mute delay.
Power down detect with mute.
Up to 350WRMS into 4 ohms or 700WRMS in 8 ohms.
£9.99 each plus p+p
p+p is £3.99 to uk and £10.99 rest of world.
Requires local mains transformer 9-0 9-0 2VA or more per speaker protect unit (can't use same transformer for both !)
2 off speaker DC protect modules.
Solid state relay.
Power up detect with four second mute delay.
Power down detect with mute.
Up to 350WRMS into 4 ohms or 700WRMS in 8 ohms.
£9.99 each plus p+p
p+p is £3.99 to uk and £10.99 rest of world.
Requires local mains transformer 9-0 9-0 2VA or more per speaker protect unit (can't use same transformer for both !)

Last edited:
Hi Nigel
Would these be suitable for protecting my high sensitivity horn drivers?
Yes should be fine so long as inside power specs I gave above.
Yes should be fine so long as inside power specs I gave above.
I would interpret this question as relating to the dc protection threshold rather than the max current the relay can withstand.
I would interpret this question as relating to the dc protection threshold rather than the max current the relay can withstand.
The specs I gave relate to max power into the speaker impedance which relates to max current through the SSR.
The DC protection threshold is over +/- 2 volts for greater than 250mS.