User Manual

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

–

WAY HEADPHONE AMPLIFIER

PC / MAC