More progress on the 4400, slow and steady.
First couple pics are access to the relay board. You will need to remove the power supply, amp board, and heatsink. Remember to mark the output transistors and take pics so you know how they go back in. Then remove the screws that hold the back panel to the chassis, and the screws that hold the speaker terminals to the back panel. Remove the 6 screws at the board edges, then figure out a way to desolder those 4 solder tabs that hold the terminals in (the ones over the relay solder joints). I haven't figured out how I'm gonna do it yet.
I should do some cleanup while I have all these boards out, dirty in there!
Third pic is the original filters. Next one is the ring terminal I installed to make way for the EPCOS 22000uF beauties in the last pic. I tinned the wires, and crimped them in the terminal for a tight mechanical connection, then filled the joint with solder. It's solid, and attractive. But I put a bit of heat shrink over the crimped part for a clean look.