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Classroom Sound Reinforcement
PRE-4 Split-type Classroom Amplifier Preamplifier Mixer Input Panel
Specifications
Compare with other models in the same series| Paired with classroom power amplifier | Above 20W |
|---|---|
| Input | Can be freely configured as 2 microphone inputs or 2 audio source inputs |
| Volume Control | Two Sets of Independent Volume Knobs |
| Parallel | Can be used in parallel with multiple panels (5 or more sets) |
| Auto Power On/Off | Automatically powers on when microphone and audio source are plugged in, and powers off when unplugged |
| Material | Metal Material |
| Connection Method | Connects to ALM-B via 4P4C cable |
| Installation Method | Fixed on a surface-mount switch box (1-gang) or compatible wall surface; recommended to be placed directly below the center of the blackboard |
| Compatible Main Unit | ALM-B Classroom Teaching Amplifier (Teaching PA 20W or above) ／ WS-817ALM Teaching PA Speaker |
Updated Date 2026-11-10
Frequently Paired Models
According to actual shipment statistics in the past: the equipment most commonly purchased together for projects involving this model.
Last Updated: 2026-11-10