The EPS001 sound hole control unit is designed to be ultralight and have minimal impact on soundboard resonance. To achieve this, we do not add a metal or plastic cover to the control unit. However, this may cause you to encounter a slight hum when pressing the PHASE button, or when touching the metal connectors on the surface of the…

The red light indicates your battery power is low and you need to replace your battery. In most circumstances, if the red light is illuminated then the power to the microphone is cut off to conserve power.

Our newer EP001K passive pickup is not only upgradable, but it uses an improved German-made Piezo element that sounds phenomenal and is compatible with the new dual-source active modules EPS001-05K for normal sound hole steel string guitars and the EPS001-15 for our OF660 offset sound hole guitars. If you need to remove our previous pickups, we recommend you use a…

To evaluate if your guitar’s pickup is the newest upgradeable version, you’ll need to get a mirror and a phone or flashlight to look into the sound hole. Position the mirror so that with the use of a flashlight or phone, you can clearly see the pickup connector on the inside of the guitar. You can even try to just…