#16 Re: Speaker Protection
Posted: Tue Jun 09, 2020 12:53 pm
I was thinking of going for a hard voltage limit instead, by using a long chain of diodes which would conduct at, say, 50V. That way, any voltage exceeding 50V at the output terminals would be pulled down. Might be worth adding a couple of ohms somewhere to keep the caps and diodes happy.
It's crude, I admit, but it'd work near-instantaneously and reliably to prevent the PSU caps discharging directly into the speaker by providing a short until the caps have less than 50v in them. At that point, I don't think there'd be much charge left and the speaker alone could safely dissipate the rest.
Combine with a fuse in the PSU, and I feel like this would catch any fault condition that might pose a threat to the speakers.
Chris
It's crude, I admit, but it'd work near-instantaneously and reliably to prevent the PSU caps discharging directly into the speaker by providing a short until the caps have less than 50v in them. At that point, I don't think there'd be much charge left and the speaker alone could safely dissipate the rest.
Combine with a fuse in the PSU, and I feel like this would catch any fault condition that might pose a threat to the speakers.
Chris