Speaker Protection Kit for under $5

[Souvick]

Can you please give me the schematic diagram of this circuit

they are on ebay and ali for long long time. I have 5 of them myself based on experience of Still4given.
Yes just change the relay to Omron G5LE, you are good to go. Transistor is S8050 general purpose NPN. works good.

 

[foxo59]

A little bit of reverse engineer

Can this be modified for SSR? Thank you.

 

[xrk971]

SSRs operate differently in that they need an optoisolator gate driver. You can look at the schematics of the one Jhofland designed here.
https://www.diyaudio.com/community/...sr-dc-speaker-protection-and-delay-gb.340694/
Global shortages of optical isolated gate drivers are really hitting us all hard now. I managed to find some but the boards had to be respun. Going into production now.