Troubleshooting - PRESONUS Eris Sub8 Owner's Manual

4 Resources
4.2

Troubleshooting

Troubleshooting
4.2
No power. First ensure that your Eris Sub8 is plugged in. If it's connected to a
power conditioner, verify that the power conditioner is turned on and functioning.
If it is, yet there is still no power to the Sub8, contact PreSonus for a repair.
No audio. If your Eris Sub8 appears to power on but you hear no sound
when playing audio (the lights are on but nobody's home), first make sure
that the cables connected to the subwoofer are working correctly. Also,
verify that the Input Level control is set to provide high enough gain.
Hum. Usually, hum is caused by a ground loop. Verify that all audio equipment is
connected to the same power source. If you are not using a power conditioner,
we highly recommend that you add one. Not only will this help to minimize
hum, it will better protect your equipment from power surges, brownouts, etc.
Use balanced cables whenever possible. If your audio device does
not offer a balanced output, you can connect it to a DI (direct-injection)
box, which will provide a ground-lift switch and a balanced output.
Finally, make sure that your audio cables are not run near power cables,
and use cables that are the appropriate length for your application.
Using cables that are too long not only increases the risk of noise, it
increases the likelihood that the cables are coiled, which will essentially
create an antenna that picks up all kinds of audio interference.
Eris Sub8
™
Owner's Manual
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