Mackie HM-4 User Manual

HM-4 4-Way Headphone Amplifier
4
HM-4 4-Way Headphone Amplifier
Hookup Diagram
The HM-4 4-Way Headphone Amplifier is an easy, convenient way to combine multiple listeners to the same
signal. The hookup couldn’t be more straighforward.
Start by turning the down the main output level on the computer and all four phones knobs of the HM-4.
Next, you will want to connect a cable from the computer’s output jack to the HM-4’s 1/4" input jack.
Now connect up to four pairs of stereo headphones to the 1/4" phones jacks 1-4. Finish up by slowly
raising the level of the computer’s output level and HM-4’s phones knobs. Easy peasy!
Note: While a computer may be the most common use, you could also connect a mixer or just about
any other audio device to the input jack of the HM-4. The possibilities are not endless, but it’s close!
Typical HM-4 Setup
INPUT 1 2 3 4
+12V DC
POWER
PHONES 1 PHONES 2 PHONES 3 PHONES 4
4 – WAY HEADPHONE AMPLIFIER
PC / MAC

Mackie HM-4 Specifications

General

Power source	DC
Product color	Black
Output impedance	47 Ω
Channel separation	22 dB
Peak power per channel	- W
Signal-to-Noise Ratio (SNR)	- dB
Total Harmonic Distortion (THD)	- %
DC-in jack	Yes
Audio (L/R) in	4
Headphone connectivity	6.3mm

Weight and Dimensions

Depth	58 mm
Width	109 mm
Height	21 mm
Weight	200 g