Network PA System – 4G Cloud Broadcasting Terminal (Aluminum, 2×50W, DC24V, Linux)

Features:

- White aluminum alloy enclosure with medium‑gray front panel, and a recessed step rainproof structure at the bottom.
- 1×4G network module, supporting mainstream operator IoT cards or SIM cards (China Telecom, China Mobile, China Unicom), realizing the integration of three networks.
- 1×RJ45 wired network communication interface.
- Adopts Linux system, excellent stability, security, portability, flexibility, incomparable to ordinary single‑chip solutions. Supports open‑source data, access to third‑party platforms and devices, open‑source service interface protocols, and access to any third‑party platforms.
- CPU: ARM Cortex A7 @ 900MHz, with 32KB I‑Cache, 32KB D‑Cache, and 128KB L2 Cache.
- Audio Codec: Supports software codec, compatible with G.711, G.726, ADPCM, and audio 3A (AEC/ANR/AGC).
- Receives platform commands and audio signals, supporting remote volume control via the platform.
- Supports latitude and longitude geographic location information, which can display the terminal position on the APP/platform.
- 4G working frequency bands: FDD‑LTE B1/B3/B5/B8; TDD‑LTE B38/B39/B40/B41; HSPA+/WCDMA 900/850/2100MHz; GSM/GPRS/EDGE 850/900/1800MHz; TD‑SCDMA B34/B39; EVDO/CDMA1x:BC0.
- Supports status feedback, which can transmit the local playback and working status back to the platform.
- Supports remote upgrade of the device via the platform.
- Supports zone and group broadcast functions of the device via the platform.
- Powered by DC24V, with a power supply current above 5A.
- Built‑in Class D digital stereo power amplifier circuit, with power output up to 2×50W/8Ω.
- Built‑in power supply lightning protection circuit, with a lightning protection level up to 4KV for higher reliability.

This **IP Network PA System** 4G cloud broadcasting terminal integrates cellular connectivity, open platform access, and high‑efficiency stereo amplification for flexible, intelligent public address.

Technical Specifications:

- Network Interface: RJ45; 4G: Push‑pull card slot
- Supported Protocols: HTTP, HTTPS, UDP, TCP/IP, RTP, RTSP, RTMP, MQTT, FTP
- Audio Formats: mp3, wav
- Sampling Rate: 8K – 48K
- Network Transmission Rate: 100Mbps
- Audio Mode: 16‑bit stereo CD quality
- Output Frequency: 60Hz – 18KHz
- Rated Power: 8Ω×2×50W
- Harmonic Distortion: ≤1%
- SNR: ≥80dB
- Input Power: DC24V, max support DC26V, current above 5A
- Power Consumption: ≤120W
- Installation Type: Bracket‑mounted
- Shell Material: Aluminum alloy
- Operating Temperature: -20℃ ~ +60℃
- Humidity: 20% ~ 80%, non‑condensing
- Dimensions: 373×152×100mm
- Weight: 2.4kg

In summary, this **IP Network PA System** 4G cloud broadcasting terminal with dual 50W amp, DC24V power, and comprehensive remote management is the ideal choice for remote schools, commercial areas, industrial parks, and outdoor public spaces requiring reliable, high‑performance IP audio distribution over cellular or wired network.