Miktek HM4 User manual

Congratulations on your purchase of the Miktek Audio Tool
Box Series signal processor! The audio industry is filled with
a lot of ‘good’audio gear. At Miktek we believe‘good’ is not
good enough! We manufacture our products to go beyond
average quality and performance.Thank you for trusting
our vision and choosing Miktek for your important audio
application.
In this manual you will find descriptions of the HM4, the four-
channel headphone amp’s features, step-by-step set-up, and
operating instructions along with detailed specifications.
In addition, we’ve also included some simple application
examples to explain the features and functions of the HM4.
For the experienced audio engineer these applications
may seem basic, however at Miktek, we are committed to
supporting and encouraging new engineers who use our
products and help them appreciate outstanding audio
quality! So, no explanation is too basic! We know you are
serious about your audio equipment, and at Miktek, we are
serious about providing superior products and service to
our customers.We appreciate your patronage and hope you
enjoy using your Audio Tool Box processors as much as we
enjoy making them for you.
Sincerely,
Michael Ketchell
Managing Director
INTRODUCTION
The HM4 is a 4-channel headphone amplifier that allows
you to independently control the level between four sets of
headphones. It is an ideal unit for personal monitoring, either
on stage or in the studio.
FEATURES
• Four channel stereo headphone amplier
• Four ¼” stereo headphone outputs plus one 3.5mm jack in
parallel for OUTPUT 4
• Four individual volume controls for each headphone
output
• ¼” stereo INPUT jack
• MONO switch for summing line level input
• 20V AC adapter included
1. CH1 – GAIN: Control knob used to adjust the output level of
Channel 1
2. CH2 – GAIN: Control knob used to adjust the output level of
Channel 2
3. CH3 – GAIN: Control knob used to adjust the output level of
Channel 3
4. CH4 – GAIN: Control knob used to adjust the output level of
Channel 4
5. CH4 – OUPUT: ¼” & 3.5mm output for connecting Channel 4
6. DC POWER INPUT: Connect the supplied power adapter here
7. CH3 – OUTPUT: ¼” output for connecting Channel 3
8. CH2 – OUTPUT: ¼: output for connecting Channel 2
9. CH1 – OUTPUT: ¼” output for connecting Channel 1
10. INPUT: ¼” TRS connector to input main stereo signal
11. MONO: Push switch for summing line level input
SETTING UP YOUR HM4
To set up your HM4, make sure all the control knobs have been
turned down to off. Connect the supplied AC adapter to the 20V
DC POWER INPUT on the rear panel and then plug the adapter
into any standard AC outlet.
TYPICAL SET-UP WITH HM4
1. Connect the output for the device you want monitored to
the INPUT jack on the HM4 rear panel
2. Apply a signal to the HM4 INPUT jack
3. Connect a headphone to Channel 1 OUTPUT jack and raise
the channel’s GAIN knob slowly to your desired level
4. Repeat the steps if additional headphones are connected
FRONT AND REAR PANEL LAYOUT
HM4 Dual Channel Personal Monitor Headphone Amp
Owner’s Manual

SPECIFICATIONS
Input Impedance. . . . . . . 100k-Ohm Unbalanced
Max Input Level . . . . . . . +19dBV
Input Connectors . . . . . . Stereo ¼” TRS Phone Jack
Outputs . . . . . . . . . . . . Four Stereo ¼” TRS Phone Jacks
. . . . . . . . . . . . . . . . . . One 3.5mm Jack
Output Impedance . . . . . 100 Ohm each output
Max Gain . . . . . . . . . . . . 20dB/Channel
S/N Ratio . . . . . . . . . . . . >90dB
THD . . . . . . . . . . . . . . . <0.005%
IMD (SMPTE) . . . . . . . . . <0.005%
Power Supply . . . . . . . . . 18V DC
Dimensions . . . . . . . . . . 144 W x 102 D x 38 H mm
Weight . . . . . . . . . . . . . 0.297 KG
348B Valeria Street
Nashville, TN USA
615 250 2434
www.miktekaudio.com
TYPICAL SET-UP WITH HM4 - Continued
NOTE 1: Make sure the GAIN knob is turned all the way down
before connecting headphones. Use caution and care for your
ears by always starting with low headphone levels and then
slowly raise the signal to a comfortable listening volume.
NOTE 2: If monitoring a mono input, engage the mono switch to
ensure the headphones will receive signal on both left and right
channels.