Brochure

AUDIO INTERFACES
Redbox - Headphone Distribution Amplifiers
RB-HD2 Dual Stereo Headphone Amplifier
61 Station Road, Irthlingborogh, Northants, NN9 5QE, United Kingdom Tel: [phone] Fax: [phone] Email: [e-mail] Internet: www.sonifex.co.uk
Audio Specification For RB-HD2
Input
Impedance: >20kΩ balanced bridging (main)
Max Input Level: +28dBu
Input Gain
Range: -12dB to +20dB gain (pre-set pots).
Output Level: Drives 150mW into 32Ω to 600Ω
headphones
Volume
Controls: -80dB to +11dB gain
Connections
Main Stereo
Input: 2 x XLR 3 pin female (balanced, can be
unbalanced)
Outputs: 2 x ¼” (6.35mm) A/B-gauge 3-pole
stereo jack sockets
Mains Input: Filtered IEC, switchable 110-120V, or
220-240V, fused, 9W max
Equipment Type
RB-HD2: Dual stereo headphone amplifier
Physical Specification
Weight: Nett: 1.35kg Gross: 2.0kg
Dimensions
(Raw): 48cm (W) x 10.8cm (D) x 4.2cm (H)(1U)
(Boxed): 53cm (W) x 20.5cm (D) x 6cm (H)
The RB-HD2 is a high performance 2-way
stereo headphone distribution amplifier for
driving up to 2 pairs of professional stereo
headphones from a single stereo or mono
input. A switch on the rear panel enables
the distribution of a mono signal to all four
outputs (i.e. both earpieces of a pair of
stereo headphones) via the left channel
input. The stereo/mono switch is located on
the rear panel to prevent accidental
knocking.
The XLR-3 inputs are electronically
balanced and can be wired unbalanced.
There are two pre-set controls on the rear
panel that adjust the level of the master
input signal to the outputs.
Each output is on a ¼” stereo jack socket
and is designed to drive 150mW into
32 ohm to 600 ohm stereo headphones.
The outputs are individually buffered with
their own front panel volume control. A LED
power indicator on the front panel displays
the power supply connection.