Instruction Manual

24
Pre-Amplifier Check
There are four pre-amplifiers (blue, red, yellow, and green).
Check each pre-amplifier in the same way.
① Press the power switch.
② Connect the headphones to the pre-amplifier.
③ Lightly rub the magnet at the bottom of the pre-amplifier and verify that sound can be heard from the
headphones. If the sound is not audible, there may be a problem with the sensitivity of the sensor.
Compare it with the other pre-amplifiers.