1U Audio Amplification Processor

4. Pickup and Coverage Angles:
Teacher mic coverage: 0° to 180°, with volume variation < 3 dB across this range.
For remote teaching: Both teacher and student mics operate in omnidirectional (360°) mode to ensure full-room pickup for far-end participants.
5. Simultaneous Local Amplification & Remote Teaching:
No manual switching required—local amplification and remote teaching functions operate concurrently, providing an integrated classroom audio solution.
6. Built-in Dual 150W Amplifier Module:
Delivers clear, detailed, and dynamic sound with excellent tonal depth and realism, ideal for both speech and multimedia content.
7. Automatic Feedback Suppression (AFC):
Boosts system gain by ≥18 dB while effectively preventing acoustic feedback (howling), enabling higher local volume without instability.
8. Automatic Echo Cancellation (AEC):
Eliminates acoustic echo caused when loudspeaker output is picked up by microphones, preventing far-end users from hearing their own voice.
Note: When AFC (local amplification) is active, AEC and AFC operate independently—remote speech does not interfere with local amplification, and local sound does not leak as echo to the far end.
9. Automatic Noise Suppression (ANS):
Reduces steady background noise by ≥30 dB, significantly enhancing speech intelligibility in noisy environments.
10. Automatic Gain Control (AGC):
During remote interactive teaching, AGC boosts weak speech by ≥15 dB while automatically limiting output during high-volume scenarios (e.g., group reading) to prevent distortion.
11. Automatic Reverberation Reduction (ARR):
Noticeably reduces room reverberation when enabled, resulting in clearer and more intelligible speech.
12. Wireless Microphone Support:
Automatically prioritizes wireless microphone input when detected for optimal amplification.
13. Flexible External Audio Input:
In addition to remote audio + reference signal inputs (e.g., C4:C5), supports an additional external audio source (e.g., from a large display or teacher’s PC). Playback of external audio does not interrupt local amplification.
14. Four-Channel Hardware Output:
Two outputs for recording, streaming, or interactive systems
Two additional outputs support up to four passive speakers (two pairs)
15. Remote Control Capability:
Device can be controlled via network (Ethernet) or RS485 interface for software-based configuration and operation.
16. Analog Volume Adjustment for Integration:
To facilitate integration with third-party hardware, the unit allows manual analog volume adjustment on:
Far-end input signal
Output signal sent to far-end
Output signal sent to loudspeakers