Sound Devices HX-3 Specifications

SOUND
DEVICES

HX-3

Portable

Headphone Amplifier

The HX-3 from Sound Devices is a portable, stereo
headphone amplifier designed for critical audio moni­toring. The audiophile-quality headphone amp is ideal
for adding headphone feeds for portable and studio
applications.

The HX-3 provides three independent headphone
feeds from balanced or unbalanced, line level
sources. Each headphone output has its own level
control, peak LED, and ¼-inch output connector. With
its extended bandwidth and high drive capability the
HX-3 can drive headphones of various impedances
to high levels with very low distortion, important for
monitoring in high SPL environments. It is powered
from two-AA batteries or external DC.

The HX-3 will provide years of superb audio perfor­mance under the most punishing studio and field
conditions.

Key Features

• Three high-current stereo headphone outputs

• Individual volume control for each headphone feed

• Stereo or mono headphone monitoring

• Peak LED - shows if headphones are clipping

• Loop output to connect additional HX-3 amps

• Flexible inputs - balanced line level XLR, stereo 1/4”,
and stereo 1/8” inputs

• Battery (2 x AA) or external 5-17 VDC powering

• Quick change battery compartment

• Compact, durable mechanical construction

www .sounddevices.com

SOUND
DEVICES

HX-3

Portable

Headphone Amplifier

FRONT PANEL

INPUT/OUTPUT PANEL

Frequency Response:

Voltage Gain:

Output Clipping Level:

Headphone Output
Impedance:

Input Clipping Level:

Dynamic Range
(balanced line inputs):

THD + Noise:

Inputs:

Loop Output:

Internal Voltage Rails:

Power:

Power LED:

34 dB - Bal line to headphone
35 dB - 1/4 & 1/8-inch to headphones

OUTPUT PANEL

10 Hz - 50 kHz, +/- 1.0 dB, any input to any output, gain controls set to 50%

+18 dBu minimum with 600 ohm load
+16 dB minimum with 300 ohm load

200 ohms

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

120 dB minimum

0.03% maximum
(from 10 Hz to 22 kHz @ +10 dBu input and output level)

XLR: electronically balanced, 22k ohm input impedance

1/4-inch unbalanced: 9.1k ohm impedance
1/8-inch unbalanced: 9.1k ohm impedance

Unbalanced, 200 ohm output impedance

+15 V and -15 V, regulated

Internal: 2 AA alkaline batteries, 10 hours life typical with nominal
External: 5 - 17 VDC via threaded coaxial connector

Green indicates power and good battery. Red indicates power with low batteries.

SOUND DEVICES

Sound Devices, LLC

300 Wengel Drive, P.O. Box 576
Reedsburg, Wisconsin 53959 USA
tel: [phone] fax: [phone]

www.sounddevices.com