Topic: Piercing feedback sound from Roland KR-7 - Headphones
I just acquired a used high end in it's day Roland KR-7 Digital piano. The good news, I won it on e-Bay. The bad news, I won it on e-Bay. It was 'local pick-up' only - in Ramona California - but I live in Houston Texas. Incredibly, I was the only bidder and won it for the opening bid. So, I had to fly to Orange county, and go pick it up in the California desert in a rented mid-sized car - which was really a pitifully small compact car taking into consideration inflation.
It was a quite a performance breaking down 180 lbs of kit and squeezing it into the passenger seat and trunk. Last night, I had it all reassembled and ready for prime. Unfortunately, by that time, time was past it's prime and the family were all in bed. So, I did what any considerate and loving husband and father would do....I plugged in a pair of nice Sony studio headphones and turned on the power to find out what she could do.
I would not be at all surprised if the original owner back in Ramona heard the horrendous piercing feedback schreech that came out of that thing. So, any ideas what might be causing it? I risked it one more time with the volume turned way way down - with the exact same result.