The RB-DA24MD is a 1U rack-mount, high-performance 24-way audio distribution amplifier. It features two inputs that can be independently routed to 12 outputs each, or combined and sent to all 24 outputs. The unit can operate in dual-mono mode (input 1 to outputs 1–12, input 2 to outputs 13–24) or mixed-mono mode, where both inputs are combined at a pre-set level and distributed across all outputs. In mixed-mono operation, three output level options are available via internal jumpers: -6dB, -3dB, or 0dB.
Product Features
2 input, 24 output distribution amplifier.
Input gain adjustment.
Balanced I/O that can be wired unbalanced.
Use as a stereo pair, or 2 x mono inputs.
High pass roll-off filter.
Output protection against PoE & phantom power.
Mixed output level adjustment.
Typical Applications
Distribute mono emergency audio signals to multiple powered monitors, to distribute a mono source (e.g. mic input converted to line) to many outputs, e.g. at a news conference.
Product Category
Distribution Amplifiers
Technical Specifications
Audio Specification
Input impedance: >20kΩ bridging (balanced)
Output impedance: <50Ω
Maximum Input Level: +28dBu
Maximum Output Level: +28dBu
Frequency Response: 20Hz to 20kHz ±0.1dB (600Ω load, ref 1kHz)
Gain Range: Adjustable -15dB loss to +15dB gain
Common Mode Rejection: >66dB typically
LF Roll Off Filter : 125Hz at 6dB/octave
Distortion: 0.01%THD @ 1kHz, red + 8dBu output
Noise: -100dB unity gain, ref +8dBu output
Connections
Inputs: 2 x XLR 3 pin female (balanced)
Outputs: 2 x 25 way D-type plug (balanced, can be unbalanced)
Mains Input: Filtered IEC, switchable 110-120V, or 220-240V, fused, 12W maximum
Fuse Rating: Anti-surge fuse 100mA 20 x 5mm (230VAC)
Fuse Rating: Anti-surge fuse 250mA 20 x 5mm (115VAC)
Equipment Type
RB-DA24MD: 24 way mono distribution amplifier
Physical Specification
Dimensions (Raw): 48cm (W) x 15.8cm (D) x 4.2 (H) (1U)
Dimensions (Raw): 19” (W) x 6.2” (D) x 1.7” (H) (1U)
Dimensions (Boxed): 58.5cm (W) x 27.4cm (D) x 10.8cm (H)
Dimensions (Boxed): 23” (W) x 10.9” (D) x 4.3” (H)
