Sonifex RB-HD1 Stereo Headphone Amplifier

Headphone Amplifier

Sonifex RB-HD1 Stereo Headphone Amplifier

Sonifex RB-HD1 Stereo Headphone Amplifier

Headphone Amplifier

SKU: 19053

Cat no: 6023

  • LED power indicator
  • Can drive two pairs of headphones
  • Rack mountable
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Estimated Delivery 1 to 2 days

£235.00 (ex vat) £282.00 (incl vat)

Sonifex RB-HD1 Stereo Headphone Amplifier

The Sonifex Redbox RB-HD1 is a 1U rack-mount stereo headphone amplifier for driving up to two pairs of professional stereo headphones from a single stereo or mono input. One headphone socket is on the front panel with one on the rear.
The main stereo input is from electronically balanced XLR-3 connectors on the rear panel, which can be wired un-balanced. The output volume for the headphones can be controlled either by a pot situated on the front panel or a VCA signal supplied externally via the remote connector. This option is controlled by the Local/Remotes Control on the rear panel.
A mono input can be mixed into the main headphone feed, for example, for mixing in talkback to the headphones. This has an input level control via a recessed adjustable potentiometer. The mono mix input can also be controlled remotely.
The stereo/mono switch is recessed on the rear panel to prevent accidental knocking.
An LED power indicator on the front panel displays the power supply connection.

Product Specification

Audio Specification

Maximum Input Level +28dBu

Input Impedance >20kohm balanced bridging (main), 10kohm unbal override

Output Level Drives 150mW into 32-600ohm headphones

Volume Control -60dB to +18dB gain

Mono Mix Input Gain Range 22dBu


Main Stereo Inputs 2 x XLR 3 pin female (balanced, can be unbalanced)

Mono Mix Input 1 x XLR 3 pin female (balanced, can be unbalanced)

Outputs 2 x 0.25" (6.3mm) A/B gauge 3-pole stereo jack sockets

Remote Control 9-pin D-type socket

Mains Input Filtered IEC, switchable 110-120V, or 220-240V, fused, 9W max

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)

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