Sonifex RB-HD1 Stereo Headphone Amplifier
Stereo Headphone Amplifier (1U)
MPN: RB-HD1 SKU: RB-HD1
The 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 uses 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.
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The 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 uses 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.
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. A stereo/mono switch is recessed on the rear panel to prevent accidental knocking. With mono selected, audio is sent to both left and right ear pieces. A LED power indicator on the front panel displays the power supply connection.
Audio Specification
- Input impedance: >20kΩ balanced bridging (main)
- Output Level: Drives 150mW into 32Ω to 600Ω headphones
- Mono Mix Input Gain Range: 22dBu
- Max Input Level: +28dBu
- Volume Control: -80dB to +11dB gain
Connections
- 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 ¼” (6.35mm) A-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
- Fuse Rating: Anti-surge fuse 100mA 20 x 5mm (230VAC), Anti-surge fuse 250mA 20 x 5mm (115VAC)
Equipment Type
- RB-HD1: Stereo headphone amplifier
Physical Specification
- Dimensions (Raw): 48cm (W) x 10.8cm (D) x 4.2cm (H) (1U) 19” (W) x 4.3” (D) x 1.7” (H) (1U)
- Dimensions (Boxed): 58.5cm (W) x 22.5cm (D) x 7cm (H) 23” (W) x 8.9” (D) x 2.8” (H)
- Weight: Nett: 1.35kg Gross: 2.0kg/Nett: 3.0lbs Gross: 4.4lbs
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