Jim Lesurf wrote:

More to the point, the original IV limiting using on the 405 was
particularly severe for reactive loads - rather common for loudspeakers!

That's a very interesting subject in its own right.

Back then, designers tended to be 'over-protective' of their output devices. No
doubt influenced by the fragility of early parts.

Things have moved on a bit. I tend no to look mainly at average dissipation as
opposed to instanteous V/I limiting now.

Can't say I've seen many failures.

Opps, giving my secrets away here.

Graham