Sonifex RB-HD2 - Dual Stereo Headphone Amplifier (1U)

Sonifex RB-HD2

The Sonifex 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.

Sonifex RB-HD2 Specifications

Audio Specification

• 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 Inputs: 2 x XLR 3 pin female (balanced, can be unbalanced)
• Outputs: 2 x ¼” (6.35mm) A-gauge 3-pole stereo jack sockets
• 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)      

Physical Specification

• Dimensions:
  
  • 48cm (W) x 10.8cm (D) x 4.2cm (H) (1U)
  • 19” (W) x 4.3” (D) x 1.7” (H) (1U)
• Weight:
  
  • Nett: 1.35kg Gross: 2.0kg
  • Nett: 3lbs Gross: 4.4lbs