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HomepageMonitoringHeadphone Amps › Sound Devices HX-3
Sound Devices HX-3

The HX-3 Headphone Distribution Amplifier is the perfect accessory to 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.

Great for radio, television, film, and music production applications, the battery-powered HX-3 accepts balanced XLR line-level inputs or unbalanced 1/4-inch and 1/8-inch stereo inputs. Its 1/4-inch loop-out can connect multiple HX-3's for additional headphone outputs. Headphones are connected to panel-mounted 1/4-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.

The HX-3 can add headphone outputs to the 552, 302, MixPre-D, MM-1, and USBPre-2.
  • 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 aluminum chassis with protective metal end panels.
  • Specifications
    Frequency Response:
    10 Hz - 50 kHz, -±1.0 dB, any input to any output, gain controls set to 50%

    Voltage Gain:
    34 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 Impedance:
    200 ohms

    Input Clipping Level:
    XLR: +24 dBu minimum
    1/4-inch and 1/8-inch inputs: +22 dBu minimum

    Dynamic Range (balanced line inputs):
    120 dB minimum

    THD + Noise:
    0.03% maximum (from 10 Hz to 22 kHz @ +10 dBu input and output level, 300 ohm load, 10 Hz - 22 kHz filter bandwidth)

    XLR: electronically balanced, 22k ohm input impedance, 1/4-inch unbalanced: 9.1k ohm impedance
    1/8-inch unbalanced: 9.1k ohm impedance.

    Internal Voltage Rails:
    ±15 V, regulated

    Power Source:
    Internal: 2 AA alkaline batteries, 18 hours life typical 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 Temperature Range:
    0 to 70 degrees C
    32 to 160 degrees F

    43 mm x 94 mm x 140 mm (h x w x d) (1.7" x 3.7" x 5.5")

    Weight (unit only):
    0.56 kg
    1.24 lbs

    Included Accessories:
    1/4-inch to 1/8-inch trs interconnect cable, rubber feet (4), locking DC jack
    Price *
    Free shipping in Canada. Conditions
    Additional information
    For more information about the HX-3, please visit the website of Sound Devices
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