One more question regarding NC400 and high capacitance load, like some ESL's mentioned in other threads. This is Hypex NC400 loaded with 6.8uF capacitor, no input signal. The amplifier oscillates at base frequency of about 52kHz - probably in interaction with its output filter. Output swing of oscillations is 3.4V1p-p. Is it OK, no problem for electrostats?
View attachment 41755
When it comes to step response with the capacitive load mentioned, it looks like this then:
View attachment 41756
(This record is measured with a LPF filter, so the carrier frequency is not visible and oscillation amplitude is reduced)