null Skip to main content
Sound Devices HX-3 Portable Headphone Amplifier
Sound Devices HX-3 Portable Headphone Amplifier

Sound Devices HX-3 Portable Headphone Amplifier

(No reviews yet)
SoundPro Item: 54977
Call for Info
Add to Wish List

Account manager
Have a Question? Ask an Account Manager

The compact HX-3 headphone distribution amplifier is the perfect accessory to quickly provide three high-performance stereo headphone feeds with individual level controls from line-level sources. The HX-3 can produce very high headphone levels with extremely low noise and distortion.

The HX-3 accepts balanced XLR line-level inputs or unbalanced ¼-inch and 1/8-inch stereo inputs. Its ¼-inch loop-out can connect multiple HX-3's for additional headphone outputs. Headphones are connected to panel-mounted ¼-inch stereo connectors.

The HX-3 has a durable aluminum chassis to withstand the punishment of field and studio environments. The unit is powered by inexpensive batteries (two-AA) or external 5-18 VDC.

Sound Devices HX-3 Features

  • Three isolated headphone outputs with individual volume controls
  • 125 dB dynamic range with flat frequency response
  • Durable ¼-inch connectors, panel mounted for strength
  • Stereo or mono monitoring
  • Peak LED indicates headphone overload
  • Two balanced XLR line level inputs or unbalanced ¼-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 aluminum chassis with protective metal end panels
  • HX-3 portable headphone amplifier1
  • 1/4" to 1/8" TRS interconnect cable1
  • Rubber feet4
  • Locking DC jack1
  • Frequency Response10 Hz – 50 kHz, -±1.0 dB, any input to any output, gain controls set to 50%
  • Voltage Gain34 dB from balanced line to headphone output, 35 dB from headphone input to headphone output
  • Output Clipping Level+18 dBu minimum with 600 ohm load, +16 dBu minimum with 300 ohm load
  • Headphone Output Impedance200 Ω
  • Input Clipping Level
    • XLR: +24 dBu minimum
    • 1/4" and 1/8" Inputs: +22 dBu minimum
  • Dynamic Range (balanced line inputs)0.03% maximum (from 10 Hz to 22 kHz @ +10 dBu input and output level, 300 ohm load, 10 Hz – 22 kHz filter bandwidth)
  • Inputs
    • XLR: electronically balanced, 22kΩ input impedance
    • 1/4" unbalanced: 9.1kΩ impedance
    • 1/8" unbalanced: 9.1kΩ impedance
  • Internal Voltage Rails±15 V, regulated
  • Power Source
    • Internal: 2 AA batteries (18 hours typical life with nominal levels)
    • External: 5 – 17 VDC via threaded coaxial connector (5.5 mm outer diameter, 2.1 mm inner diameter), pin positive, sleeve negative
  • Power LED
    • Green: indicates power and good battery
    • Red: indicates power with low batteries (LED turns red when 4 hours of battery life remain)
  • Operating Temperature32°F to 160°F (0°C to 70°C)
  • Dimensions (HxWxD)1.7" x 3.7" x 5.5"
  • Unit Weight1.24 pounds

In The Box

Sound Devices HX-3 Portable Headphone Amplifier

Customer Reviews