"Eiron"

Have we all stopped arguing? May I ask a question?
What's the best way to check if a power amp is likely to be stable
into a capacitive load such as an ESL?

** ESLs are not capacitive loads - that is an absurd myth.


I could put a 2uF cap on the output and look at the output on a scope
while feeding it with a square wave.

** Creates a load condition that does not exist with any hi-fi speaker.

Totally stupid.


One old Rotel amp has a warning in the manual against capacitive loads,

** Can you quote the actual wording ?

Some amplifiers are not suitable for direct connection to * transformer
input * speakers like the Quad ESL57 - mostly because they lack sub-sonic
filters and current limiting OR because they are simply too powerful.

If you have a combination of speaker and amplifier in mind, then post the
info.



..... Phil