Hollyland HL-2/4 Wire Converter for Intercom Systems
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Hollyland HL-2/4 Wire Converter for Intercom Systems
The Hollyland HL-2/4 Wire Converter bridges legacy 2-wire party-line and modern 4-wire matrix intercom infrastructures in broadcast trucks, studios, and live-event venues. Its industrial metal housing, flexible 12–36 VDC powering, and auto-null echo suppression deliver reliable, low-noise communication over long cable runs.
Distance compensation switches let you fine-tune for up to 656 ft (200 m) of cable, while front-panel gain trims and six-segment LED meters provide precise level control. Built-in static and voltage protection guards connected systems, and the compact enclosure integrates easily into existing racks or mobile kits.
This converter supports bi-directional audio and call signalling, making it ideal for integrating Clear-Com®, RTS®, Datavideo®, Syscom 1000T, and similar intercom models without additional hardware.
Key Features
- 2-/4-Wire Conversion: Bi-directional audio & call-signal compatibility
- Auto Nulling: One-button echo cancellation for clean circuits
- Distance Compensation: Switchable for 50 m, 100 m, 150 m, 200 m lines
- Gain Control: ±6 dB trims on 4-wire I/O; 12 dB gain to 2-wire bus
- LED Level Meters: Six-segment indicators for real-time monitoring
- Static & Voltage Protection: Safeguards connected intercom equipment
- Interfaces: 3-pin XLR F (2-wire), 3-pin XLR M (2-wire), 3-pin XLR F (4-wire In), 3-pin XLR M (4-wire Out), USB-C service port
- Wide DC Input: 12 – 36 V 2-wire powering; <1.5 W consumption
- Industrial Build: Powder-coated metal chassis, –4 °F to 140 °F operating range
Technical Specifications
- Dimensions: 4.72? × 4.29? × 1.69? (12.0 × 10.9 × 4.3 cm)
- Weight: 1.14 lbs (0.52 kg)
- Power Supply: 12 – 36 V DC via 2-wire line
- Power Consumption: <1.5 W
- 2-Wire Output
- Noise: <–68 dBu
- Impedance: 104 ? – 240 ?
- Frequency Response: 100 Hz – 5 kHz ±3 dB
- Distortion: <1 % @ 1 kHz
- S/N Ratio: >55 dB @ –12 dBu
- 2-Wire Input
- Max Level: ?6 dBu (uncompressed)
- Input Impedance: >10 k?
- Gain to 4-Wire Out: 12 dB ±1 dB
- 4-Wire Output
- Noise: <–60 dBu
- Output Impedance: <400 ?
- Frequency Response: 100 Hz – 5 kHz ±3 dB
- Distortion: <1 % @ 1 kHz
- S/N Ratio: >55 dB @ 0 dBu
- 4-Wire Input
- Max Level: ?18 dBu (uncompressed)
- Input Impedance: <10 k?
- Gain to 2-Wire Out: –12 dB ±1 dB
- Operating Temperature: –20 °C to +60 °C (–4 °F to 140 °F)
What's Included
- HL-2/4 Wire Converter × 1
- USB Type-C Cable × 1
- Mounting Screws × 5
- User Guide × 1
