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Sonifex RB-DHD6 Digital 6 Way Headphone Distribution Amplifier
The RB-DHD6
The RB-DHD6
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The RB-DHD6 digital 6 way headphone distribution amplifier is a 1U rack-mount which receives a digital input signal, as either AES/EBU or S/PDIF and converts it to 6 individually buffered, jack-plug, headphone outputs, each with their own volume control.

Useful for connection to digital mixing desks, digital routers and matrices, the RB-DHD6 connects directly to an AES/EBU or S/PDIF output to provide the highest quality audio directly to the headphones.

The input connectors consist of a single balanced XLR-3 for the AES/EBU input and a single unbalanced phono connector for the S/PDIF input.

A button located on the rear panel is used to select either the AES/EBU, or S/PDIF, input and de-emphasis on the output can be controlled via dipswitch. If de-emphasis is On the RB-DHD6 will decode 50/15µs emphasis when indicated by certain channel status bits in the incoming digital audio data.

When operating, the front panel power LED flashes red and amber whenever the unit is not synchronised to the incoming digital signal.

  Audio Specification
Output LevelDrives 150mW into 32 to 600ohm headphones
Maximum Output Level+12dBu unbalanced
Dynamic Range>100dB
Input Impedance110ohms +/-20% AES/EBU
75ohms +/-15% S/PDIF
Headphone Gain Range-80dBu to +12dBu
Sample Frequency Range30kHz to 100kHz
  Connections
Digital Inputs1 x AES/EBU XLR 3 pin female
1 x S/PDIF RCA phono
Headphone Outputs6 x 6.35mm A/B-gauge 3-pole stereo jack socket
Mains InputFiltered IEC, 110-120V, or 220-240V, fused, 10W max
  Operational Controls
De-emphasis On/OffDIP switch
Digital Input SelectAES/EBU or S/PDIF, via push-switch
  Physical Specification
WeightNett: 1.6kg
Gross: 2.2kg
DimensionsRaw: 48cm (W) x 10.8cm (D) x 4.2cm (H) (1U)
Boxed: 53cm (W) x 20.5cm (D) x 6cm (H)

  Equipment Type
  Code  DescriptionPlug
RB-DHD6 UKDigital 6 Way Headphone Distribution Amplifier, 230V (UK 3 pin to IEC)UK
RB-DHD6 EUDigital 6 Way Headphone Distribution Amplifier, 230V (European Schuko 2 pin to IEC)EU
RB-DHD6 USDigital 6 Way Headphone Distribution Amplifier, 115V (USA 3 pin to IEC)US
RB-DHD6 AUDigital 6 Way Headphone Distribution Amplifier, 230V (Australasian 3 pin to IEC)AU

  Accessories for this Product
  Code  Description 
RB-RK31U rear panel rackmount kit for large RedboxRK3


Sonifex Ltd. 61 Station Road, Irthlingborough, Northants, NN9 5QE, UK.
Tel: +44 (0)1933 650700 Fax: +44 (0)1933 650726 EMail: sales@sonifex.co.uk