CT/KB200-4G-B
Host of Emergency Warning Broadcasting System
PRODUCT FEATURES
· Standard 100V constant voltage output, total volume adjustment, maximum power 500W;
· Adopting AC 220V mains power supply, 12V/24V can be customized;
· Equipped with 4G wireless network function;
· Equipped with one-key alarm function, convenient and fast, with protective covers on the buttons to prevent accidental triggering;
· Equipped with 24V dry-contact linkage trigger input, it can be connected to the fire center, and play specified audio sources;
· Equipped with various alarm audio sources, such as fire alarm, public security, and disaster, which can be played with one-key operation;
· One auxiliary audio source input, can be connected to the Tianyi wireless broadcasting system, and the volume is independently adjustable;
· The network interface is based on TCP/IP transmission protocol and can be connected to networked broadcasting systems;
· Equipped with a 100V constant voltage audio input interface, with the highest priority for easy connection to other emergency broadcasting systems;
· Equipped with offline function, when the equipment is powered off, the signal of 100V constant voltage audio input can be directly transmitted to the speaker system of the equipment;
· One handheld emergency microphone, equipped with an anti-misplug aviation interface and independently adjustable volume, has the same priority as 100V audio input;
· One channel with 6.3 microphone input interface for convenient access to wireless microphone;
· Fully automatic exhaust system ensures safe and stable operation of the equipment;
· With power, signal, protection, and network indicator lights;
· Dimensions: 320×315.5×79 mm;
· Weight: 4.5 kg.
TECHNICAL SPECIFICATION SHEET
Compliant with IEC 60268-3 (Amplifiers), IEC 60268-5 (Loudspeakers), GB/T 14198–2017 (Audio Equipment Safety)
1. GENERAL IDENTIFICATION
Item | Value |
Model | CT/KB200-4G-B |
Product Name | 4G-Enabled High-Power Constant-Voltage Broadcast Amplifier |
Application | Centralized public address for large-scale sites: airports, stadiums, industrial parks, smart cities, emergency warning networks |
Cooling Method | Intelligent dual-fan forced air cooling with temperature-controlled speed |
2. ELECTRICAL PERFORMANCE
Parameter | Value | Compliance / Notes |
Rated Output Power | 500 W | At 100 V output, THD ≤ 1%, 1 kHz sine wave |
Output Mode | 100 V Constant Voltage | Compatible with 70 V / 100 V line loudspeakers; includes built-in 100 V transformer |
Input Sensitivity | 0.775 V / 1 V (switchable) | Unbalanced (RCA/phono) input |
Input Impedance | ≥ 10 kΩ (unbalanced) | — |
Frequency Response | 60 Hz – 15 kHz (±0.5 dB) | Measured at 1/3 rated power into 100 V load |
Total Harmonic Distortion (THD) | ≤ 1% @ 1 kHz, 1/3 power | IEC 60268-3 §5.3 |
Signal-to-Noise Ratio (SNR) | ≥ 80 dB (A-weighted) | Reference: full output, input shorted |
Damping Factor | > 200 @ 100 Hz | Ensures tight low-frequency control |
Power Requirements | AC 200 V – 240 V / 50 Hz – 60 Hz, 10 A max | Customizable voltage range available upon request |
Efficiency | ≥ 75% (typical) | Measured at 1/2 rated power |
3. CONNECTIVITY & CONTROL
Interface | Specification |
Audio Input | 1 × RCA (unbalanced), gold-plated |
Line Output | 1 × RCA (loop-through, unbalanced) |
Remote Control | 1 × RJ45 (RS-485 protocol), supports daisy-chain up to 32 units |
4G Communication Module | Built-in LTE Cat.4 module (B1/B3/B5/B8/B20/B28), SIM card slot (nano-SIM), supports APN configuration, remote firmware upgrade, real-time status reporting (power on/off, temperature, fault alarms) |
Status Indicators | LED panel: Power, Signal, Protect, 4G Link, Network Status |
Protection Circuits | Overload, Short-Circuit, Over-Temperature, DC Offset, Power-On Surge Suppression |
4. SAFETY & CERTIFICATIONS
Standard | Status |
Safety | GB/T 14198–2017, IEC 60065 |
EMC | GB/T 9254–2021 (Class B), EN 55032, EN 55035 |
RoHS | GB/T 26572–2011 |
4G Radio Approval | SRRC (China), CE RED (EU) |
5. APPLICATION NOTES
· ✅ Designed for integration into smart emergency broadcast systems, supporting remote activation via 4G cloud platform (e.g., “Emergency Broadcast Cloud” or custom MQTT/HTTP API).
· ✅ Supports priority override: microphone input > line input > MP3 playback (if external player connected).
· ✅ Fan speed automatically adjusts based on internal temperature — silent operation under light load.
· ⚠️ Do not operate without proper grounding. Use dedicated circuit breaker (16 A minimum).
· ⚠️ 4G module requires valid SIM card with data plan and correct APN configuration.
