Gain Controls
Turn the GAIN controls clockwise to increase gain and counter clockwise to decrease gain. The GAIN controls are marked in dB of attenuation. There are 21 detents for repeatable adjustments. The upper 14 steps are about 1 dB each, and settings should normally be made within this range. The range below 14 dB should not be used for normal program levels, as the input headroom could be exceeded, but can be used for testing at reduced levels. At the minimum setting, the signal is completely cut off. Note! The GAIN controls do not adjust the power of the amplifier. They adjust its sensitivity to input signals. Gain controls and LED cluster on PLX 1104 and PLX 1804 models
Gain controls and LED cluster on PLX 1802, PLX 2502, PLX 3102, and PLX 3603 models
Power Switch
Push in on the top of the rocker switch to apply AC mains power to the amplifier. Push in on the bottom of the rocker switch to turn the amplifier off. When turned on, the blue PWR indicator LED and the red CLIP indicator LED will illuminate; after a few seconds the red CLIP indicator will extinguish.
