PL-990 - Feedback or Distortion Liam December 14, 2022 20:03 Updated Symptom: Feedback, howling noise or distorted audio. Solution: Connect to the amplifier's AUX jacks. Do not connect to PHONO jacks. Place the turntable on a solid support away from the speakers. Related articles PL-990 - Humming or Buzzing Noise PL-990 - Diagram Comments 0 comments Please sign in to leave a comment.