Speaker Protection
Speaker Protection Board
Used this board
https://www.diyaudio.com/community/threads/rtr-ssr-speaker-protection-gb-4.378742/
PS Parts
J3, J4 Molex 22-23-2021
J2 Molex 22-23-2031
D3, D4 1n4004 (used 1n4007 because I had them, 1000v instead of 400v)
D5 Lite-on LTL-4231N
C1 4u7 50V Wurth 860020672008
R2 20k Vishay
Connect X103 to low cap PSU output
low cap PSU
D3 and D4 = 1n4004
Other options and info
Headphone protection board
esty headphone protection XRKAudio link
https://www.diyaudio.com/community/threads/ssr-for-speaker-protection.318946/
https://www.diyaudio.com/community/threads/output-relays.191449/page-2#post-2618977
https://www.halfgaar.net/dc-protection-with-relays
https://diyaudiostore.com/products/soft-start-speaker-turn-on-delay-and-dc-protector-boards $25 with soft start
https://www.diyaudio.com/community/threads/power-supply-soft-start-board-v3.247280/
https://neurochrome.com/products/guardian-686?variant=29621033173062 $50 for PWB