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Sound Devices HX-3 – Portable Headphone Distribution Amplifier

Sound Devices HX-3 – Portable Headphone Distribution Amplifier

£575.00 (ex VAT)
£690.00 (inc VAT)
SKU: HX-3

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Sound Devices HX-3 – Portable Headphone Distribution Amplifier

The Sound Devices HX-3 is a compact, professional headphone distribution amplifier that provides three high-performance stereo headphone feeds, each with an individual level control. Designed for radio, television, film and music production, it delivers high headphone output levels with exceptionally low noise and distortion.

The HX-3 accepts balanced XLR line-level inputs as well as unbalanced ¼-inch and ⅛-inch stereo sources. A ¼-inch loop output allows multiple HX-3 units to be connected together when additional headphone feeds are required.

Built for both field and studio use, the HX-3 features a durable aluminium chassis and can be powered by two AA batteries or an external 5–18 VDC supply.

 

What's in the Box:

  • HX-3 Headphone Amplifier
  • Headphone adapter cable (1⁄4 inch to 1⁄8 inch)
  • Coaxial female power connector
  • 4 Adhesive rubber “bumpers”

 

 

  • Three isolated headphone outputs with individual volume controls.
  • 125 dB dynamic range with flat frequency response.
  • Durable 1/4-inch connectors, panel mounted for strength.
  • Stereo or mono monitoring.
  • Peak LED indicates headphone overload.
  • Two balanced XLR line level inputs or unbalanced 1/4-inch and 1/8-inch stereo inputs.
  • Loop Output to connect additional HX-3’s in series.
  • All-metal connectors solidly mounted to the chassis for durability and RF immunity.
  • Free from “Pin-1” grounding problems.
  • Internal battery-power for up to 18 hours from two AA alkaline batteries.
  • Chassis-isolated 5 to 18 VDC input for easy external DC powering.
  • Power LED indicates low battery power.
  • High strength, extruded aluminium chassis with protective metal end panels.
Frequency Response 10 Hz–50 kHz, ±1.0 dB
Voltage Gain 34 dB, balanced line to headphone output; 35 dB, headphone input to headphone output
Output Clipping Level +18 dBu minimum @ 600 Ω; +16 dBu minimum @ 300 Ω
Headphone Output Impedance 200 Ω
Input Clipping Level XLR: +24 dBu minimum; ¼" / ⅛": +22 dBu minimum
THD + Noise 0.03% maximum, 10 Hz–22 kHz @ +10 dBu input/output, 300 Ω load
XLR Inputs Electronically balanced; 22 kΩ input impedance
¼" Input Unbalanced; 9.1 kΩ input impedance
⅛" Input Unbalanced; 9.1 kΩ input impedance
Internal Voltage Rails ±15 V, regulated
Internal Power 2 × AA alkaline batteries; approximately 18 hours typical runtime
External Power 5–17 VDC via threaded coaxial connector; 5.5 mm OD / 2.1 mm ID; centre positive
Power LED Green: power/good battery; Red: low battery; red at approximately 4 hours remaining
Operating Temperature 0°C to 70°C / 32°F to 160°F
Dimensions (H × W × D) 43 × 94 × 140 mm / 1.7 × 3.7 × 5.5 in
Weight 0.56 kg / 1.24 lbs
Included Accessories ¼" to ⅛" TRS interconnect cable, 4 × rubber feet, locking DC jack

 

 

 

 

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