Troubleshooting - EP175 & EP350

Below are some of the commonly-noted issues that may come up with your powered subwoofer, and a few troubleshooting ideas that should fix them. If you still hear the symptom after trying the fix, please contact us directly so that we can help you solve the issue promptly.

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No Power Check Fuses are not blown

Check that the voltage selector is at the 100-120 position (or 220-240 for Europe and China)

World Electric Power - Click here to view a complete list of world voltages and frequencies.
Humming Remove or insert ground screw

Put Antenna Ground Isolator in incoming antenna cable

Try to plug the subwoofer in the same electrical outlet which is used by the other system components or the same electrical circuit

Verify that the electrical wall outlet is properly grounded and that the polarity is respected

As a last resort we suggest, is to use a Universal adaptable three-prong electrical plug
F.M. Noise Use fully shielded coax cable to the antenna - RG6 Quad Shielded recommended

Do not use a folded dipole antenna
TV Interference Use fully shielded coax cable to the antenna - RG6 Quad Shielded recommended
Green Light On But No Audio 1) If using high level in, check that speaker leads are not reversed
2) Check input cable is completely inserted and working
3) Turn amp off and then on again
4) Speaker wire internally may be disconnected
5) Check your receiver menu settings to see if sub is turned on
Turning Off and On While Playing Turn sub volume in your receiver up and volume on the sub down

Deactivate auto on/off circuit
Stops working after power interruption Turn amp OFF and then ON again
Sub quits during loud playback Turn amp OFF and then ON again (Protection circuit automatically shuts amp off if prolonged distortion is detected)
Makes intermittent noises after power interruption Turn amp off and then on again
Vibrating / Rattling Remove the speaker from the cabinet to verify that all wires are secured and not contacting the speaker during operation.