u/wayne63

When refoaming vintage speakers I use two AA batteries in series (3V) to pull or push the cone for easier glue application and to "seat" the cone once the glue is applied. I also use a cheap Lepai chip amp to send a ~30HZ signal to keep the voice coil centered.

My last project needed both, when I disconnected the DC that was "seating" the glued cone to the frame it fell away and I couldn't use my 30hz signal.

I would like to combine the two, is it as simple as polarized capacitors on the output of the amp to block the 3V DC?

THE FACTORY IS WARMING UP.
Hello from Warsaw, IN! We're on track to start production and deliveries at the end of the year, so here's a little progress report:
100% of the body shop robots have been installed. Automation cells are the individual robotic workstations that handle each step. They’re all installed and operational.
The trim line installation is well underway. This is where components like wiring, seats, and windows get installed. We’re also making progress with our quality inspection equipment, like the four-post shaker, which simulates all the vibrations and bumps the Slate Truck will experience on the road.
We’re already producing vehicle parts. They’re being used in final test phases to ensure we deliver a quality Truck before making the real thing.THE FACTORY IS WARMING UP. Hello from Warsaw, IN! We're on track to start production and deliveries at the end of the year, so here's a little progress report:100% of the body shop robots have been installed. Automation cells are the individual robotic workstations that handle each step. They’re all installed and operational.The trim line installation is well underway. This is where components like wiring, seats, and windows get installed. We’re also making progress with our quality inspection equipment, like the four-post shaker, which simulates all the vibrations and bumps the Slate Truck will experience on the road. We’re already producing vehicle parts. They’re being used in final test phases to ensure we deliver a quality Truck before making the real thing.