Home › Forums › Products › Stompboxes › H-9 making high pitched siren squeal › Reply To: H-9 making high pitched siren squeal July 28, 2014 at 11:15 pm #126405 RC2Member I've tried several preset and it's the same, this screech goes far beyond just noise. I'll try restoring the factory presets and see if that helps. Thanks for the suggestions.
