Gareth Magennis wrote:

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My test bench has for many years had a couple of ground isolated Neve 1:1
transformers between XLR input test sockets and stereo monitors.


** Are they toroidal, red coloured with black potting in the centre ?

Which has never been a problem, but has ALWAYS been a problem connecting any
CryBaby Wah Wah pedal.

If you do, the CryBaby resonates at full volume, behaving much like turning
a VCF resonance control to full, so it self oscillates.
Why is that?

I guess that means you could never directly connect a CryBaby to any
transformer balanced mixer input.



** You need an active DI for that job, preferably with JFET input.

Maybe you could add 48V phantom for it to one of the XLRs with two 6.8kohms.



....... Phil
...... Phil