4x4R

Four Mic/Line Inputs
Accepts up to four independent microphone or line-level sources for flexible signal distribution.

Sixteen Balanced Outputs
Distributes audio to multiple destinations simultaneously while maintaining clean, consistent signal quality.

Studio-Grade Mic Preamps
Built-in microphone preamps deliver clean, transparent amplification for professional live and broadcast applications.

Variable Gain Control
Independent gain adjustment on each channel allows precise matching of input levels.

Mic/Line Switching
Each channel can be configured for either microphone or line-level sources to suit different signal types.

48V Phantom Power
Provides switchable phantom power for condenser microphones that require it.

Input Level Metering
Dedicated LED meters on every channel provide clear visual monitoring of incoming signal levels.

Headphone Monitoring
Integrated headphone output with channel selection allows fast signal checking without external equipment.

Active Signal Splitting
Maintains consistent output levels and reliable performance, even when driving long cable runs.

Optional Transformer Isolation
Transformer-isolated outputs help eliminate ground loops, reduce interference, and improve system isolation.

Flexible Output Routing
Configurable linking allows operation as multiple independent splitters or a high-output pressbox from a single input.

Pressbox Operation
Can distribute one microphone or line source to multiple outputs, making it ideal for press conferences and media events.

Professional Rackmount Design
Compact 1U chassis provides a reliable solution for fixed installations, touring systems, and broadcast environments.

Designed and Hand-Built in the UK
Engineered and manufactured by Drawmer for dependable professional audio performance.

General Specifications
Device Type: Rackmount active mic/line signal splitter
Channels: 4 inputs, 16 outputs
Rack Size: 1U, 19-inch rackmount
Applications: Live sound, broadcast, sports, recording, press conferences, corporate events
Configuration Modes: 1×1-in/16-out, 2×1-in/8-out, 1×1-in/12-out + 1×1-in/4-out, 4×1-in/4-out
Headphone Monitoring: Yes
Manufacturing: Designed and handmade in the United Kingdom

Input Specifications
Inputs: 4 balanced XLR mic/line inputs
Maximum Input Level: +21 dBu
Input Impedance (Mic): 1 kΩ
Input Impedance (Line): 4.1 kΩ
Mic/Line Switching: Yes
Phantom Power: +48 V per channel
Gain Range: 0 dB to +66 dB in 6 dB steps
Input Metering: 6-LED bargraph per channel

Output Specifications
Outputs: 16 balanced XLR outputs (4 per channel)
Maximum Output Level: +21 dBu
Output Impedance: 50 Ω
Output Isolation: Optional transformer isolation
Transformer Status Indicator: LED

Audio Performance
Frequency Response: 13.4 Hz to 46 kHz (-1 dB)
Frequency Response: 8 Hz to 85 kHz (-3 dB)
Equivalent Input Noise: -128 dBu
THD: 0.005% @ +4 dB line input
Line Noise (Audio Band): -100 dBu
Line Noise (Full Band): -93 dBu
Crosstalk: >87 dB @ 20 kHz

Features
Active Signal Splitting: Yes
Linking System: Yes
Headphone Monitor Output: 1/4-inch TRS
Listen Function: Selectable per input channel

Power
Power Requirements: 115 V or 230 V AC, 50–60 Hz
Power Consumption: 20 VA
Fuse Rating: T500 mA (115 V and 230 V)
Fuse Type: 20 mm × 5 mm, Class 3 Timed-Blo, 250 V

Physical Specifications
Width: 482 mm
Height: 44 mm
Depth: 223 mm
Weight: 2.8 kg (without isolating transformers)
Weight: 3.3 kg (with isolating transformers)