Description 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.
Front Panel
Headphone level control for each output (x3)
Peak indicator for each headphone output
Stereo/Mono selection switch
Power LED indicates green when powered, red when batteries are low
Power switch selects powering source
Input Panel
Balanced, stereo, line-level input on XLR
Unbalanced TRS stereo input on 1/4-inch connector
Unbalanced TRS stereo input on 1/8-inch connector
Loop output on 1/4-inch to link additional HX-3s
Output Panel
1/4-inch TRS stereo headphone outputs (x3)
1/8-inch TRS stereo headphone output
Battery tube (2 x AA)
DC input, 5 - 18 VDC
HX-3 Key Features
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.
HX-3 Key Features List
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.
Specification
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)
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