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JBL SCS125A System - Page 5 Questions & Answers
When I turn up level on subwoofer it makes loud humming noise. JBL
Try the following steps to stop subwoofer hum.
- If the subwoofer is plugged into its own outlet, plug the subwoofer's power cord into an outlet shared by the other components. Use an extension cord if necessary.
- If the hum persists, and your system includes a cable TV, disconnect the cable line. If the hum stops, install an isolation transformer on the cable.
- If the hum persists, disconnect the remaining component cables one at a time until the hum stops. Install a coaxial isolation transformer on that cable.
- If the hum persists, install a line-level ground loop isolator on the subwoofer's line-level feed cable. This usually solves most hum problems.
- If nothing helps, disconnect all the audio cables from the subwoofer. Leave the subwoofer plugged in and switched on. If the subwoofer hums, it points to a defective unit. Contact the company's customer service to technical support.
11/11/2018 10:58:26 PM •
JBL Audio...
•
Answered
on Nov 11, 2018
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