Owner’s Manual
7
Owner’s Manual
HM-4 4-Way Headphone Amplifier Specifications
Appendix B: Technical Information
Physical Properties
Height: 2.0 in / 51 mm
Width: 4.3 in / 109 mm
Depth: 2.3 in / 58 mm
Weight: 0.5 lb / 0.2 kg
Disclaimer
Since we are always striving to make our products better by incorporating new
and improved materials, components, and manufacturing methods, we reserve
the right to change these specifications at any time without notice.
The “Running Man” figure is a registered trademark of LOUD Audio, LLC.
All other brand names mentioned are trademarks or registered trademarks
of their respective holders, and are hereby acknowledged.
©2018 LOUD Audio, LLC
All Rights Reserved.
Audio Performance
Maximum Level (1/4" input) +22 dB
Input / Output
Input Type Female 1/4" phono, unbalanced, stereo
Input Impedance 10 k each channel, unbalanced
Output Type 4x Female 1/4" phono, unbalanced, stereo
Output Impedance 47
each channel, unbalanced
Level Control 4x Rotating Phones Knobs
Power Requirements
+12V DC
Current Draw <220 mA, maximum
Safety Features
Display LEDs Top power on/o
HM-4 4-Way Headphone Amplifier Dimensions
2.3 in
58 mm
2.0 in
51 mm
WEIGHT
0.5 lb
0.2 kg
4.3 in / 09 mm
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