Network PA System – Preamplifier (2U, 10 Inputs, 4 Outputs)

Features:

- High‑grade aluminum 2U black anodized brushed panel, elegant and stylish.
- 10‑segment LED level dynamic indication.
- Built‑in chime/siren output with priority function.
- 10‑channel input (5 microphone, 3 line, 2 emergency).
- Independent volume adjustment for each input channel.
- Master volume control, independent treble and bass adjustment.
- Mute function with automatic mute down to -30dB.
- 4 AV output interfaces, connectable to 4 power amplifiers.
- 1 mute mode switch, can be turned on/off as needed.
- 1 signal ground/floating ground switch, selectable for on‑site debugging.
- 3 gain selectable switches for audio output (0.775V/1V/1.5V), default 0.775V at factory.
- Dual power supply (DC24V & AC100~240V), automatically switches to DC24V when AC input is lost.

This **Network PA System** preamplifier provides flexible input management, priority control, and dual‑power redundancy for professional public address installations.

Technical Specifications:

- Microphone Input (MIC): 600Ω, 5mV, unbalanced.
- Emergency Input (EMC): 10kΩ, 200mV, unbalanced.
- Line Input (AUX): 10kΩ, 200mV, unbalanced.
- Line Output: 10kΩ, 0.775V (0 dB), unbalanced.
- Frequency Response: 60Hz~15kHz (±3dB).
- Total Harmonic Distortion: THD<0.01% at 1kHz.
- Signal‑to‑Noise Ratio (S/N): >70 dB.
- Tone Control Range: BASS: 100Hz(±10dB), TREBLE: 12kHz(±10dB).
- Mute Attenuation: When MIC1 is active, MIC2~MIC5, EMC1~EMC2, AUX1~AUX3 attenuate 0‑30dB; When EMC1‑EMC2 is active, MIC2‑MIC5, AUX1~AUX3 attenuate 0‑30dB.
- Power Supply: AC220V ±10% 50‑60Hz.
- Power Consumption: 10~15W.
- Machine Dimensions: 69(H) × 483(W) × 350(D) mm.
- Net Weight: 5.96kg.

In summary, this **Network PA System** preamplifier with 10 inputs, 4 outputs, and priority mute is the ideal choice for schools, hotels, factories, and commercial buildings requiring centralized audio source management and priority control.