[geoff]

On 20/01/2019 11:21 AM, wrote:
Somebody posted this on a Queen forum three years ago:

"The piano mic system was a helpinstil pickup. Basically a humbucker pickup designed to fit on the piano sound board. The output as far as I know was split three ways. One to FOH, one to the monitor desk (stage left) providing a mix for the whole band and one to Freddies two piano monitors via the volume tone and presence control. The last of the three was important to Freddie as he needed to have immediate control of the piano sound in that area of the stage as when he was playing he was not in contact with the monitor mix position (being on the opposite side of the stage and facing off stage).

The control box had no effect on the sound the rest of the band and audience heard. "




Thanks for that. I had got interested in the OP's question and have been
trying to get a clearer picture of the box.

I had assumed it was something to do with piano mics, or as it turned
out 'pickups'.

geoff