Important <Let's Not Use It This Way - Fostex X-12 Owner's Manual

Important
1. Do not bring the microphone too close to the monitor speakers connected to the [LINE OUT]
jack when the [LINE OUT/PHONES] level control knob is raised.
Doing so could cause feedback from the speaker and headphone which could damage your
hearing.
[INPUT] jack
2. Do not directly apply an output signal from the [LINE OUT] jack to the [INPUT] jack.
As shown in schematic below, if the [LINE OUT] jack is directly connected to the [INPUT] jack
and the [LINE OUT/PHONES] knob is raised, it will cause oscillation. Should you be monitoring
by headphone, this could hurt your hearing.
[INPUT] jack
<Let's not use it this way>
[LINE OUT] jack
[LINE OUT] jack
5
Model X-12 Owner's Manual
The amplifier contained
monitor speaker
Microphone