Mackie HM-54 User Manual - Rear Panel
9
Owner’s Manual
Owner’
s Manual
Rear Panel
The rear panel is where you make all your analog audio
connections to the HM-54 (except for the convenient
additional headphone jacks on the front).
6. IEC Power Receptacle
This is a standard 3-prong IEC power connector.
Connect the detachable linecord (included in the box
with your HM-54) to the power receptacle, and plug
the other end of the linecord into an AC outlet properly
configured for your particular model.
7. LEFT and RIGHT PHONES INPUT
These 1/4" TRS jacks accept a balanced or
unbalanced line-level input signal. This is the signal
that you select when you push in the SOURCE select
switch [3] on the front panel, so connect the individual
headphone mix from the mixer to these inputs.
The 1/4" TRS inputs are wired as follows:
Sleeve = Shield or ground
Tip = Positive (+ or hot)
Ring = Negative (– or cold)
If you are connecting a mono input signal to these
inputs, use a Y-Cord splitter to connect the signal to
both inputs (otherwise you will only hear the signal
in one side of the headphones). See “Mults and Y’s” in
Appendix B for more info.
8. PHONES OUTPUT
This is another headphone output that duplicates the
PHONES [2] output on the front panel. Typically, you
would use these when installing the HM-54 in a rack
and hard-wiring the headphone outputs to a patch panel
in the rack.
Note:
Plugging headphones into the front panel
PHONES jack automatically disconnects the signal from
the rear panel PHONES jack.
9. LEFT and RIGHT MAIN INPUT
These 1/4" TRS jacks accept a balanced or unbalanced
line-level input signal. This is the signal that you select
when you leave the SOURCE select switch [3] on the
front panel in the out position, so connect the main mix
output from the mixer to these inputs.
The 1/4" TRS inputs are wired as follows:
Sleeve = Shield or ground
Tip = Positive (+ or hot)
Ring = Negative (– or cold)
If you are connecting a mono input signal to these
inputs, use a Y-Cord splitter to connect the signal to
both inputs (otherwise you will only hear the effects
in one side of the headphones). See “Mults and Y’s” in
Appendix B for more info.
10. MAIN PHONES INPUT
This is a 1/4" TRS headphone input jack. This allows
you to use the headphone output from your mixer to
provide the main mix signal to the HM-54. Simply use a
TRS-to-TRS cable to connect the PHONES output from
the mixer to this input on the HM-54.
Note:
Plugging the main mix signal into the MAIN
PHONES INPUT jack automatically disconnects the
LEFT and RIGHT MAIN INPUT [9] jacks.
LINE INPUT
LEFT
RIGHT
PHONES
INPUT
~120VAC
50/60 HZ 12W
.25A/250V
HM-54
MAIN
INPUT
OUTPUT
LEFT
RIGHT
PHONES
4
PHONES
INPUT
OUTPUT
LEFT
RIGHT
PHONES
3
PHONES
INPUT
OUTPUT
LEFT
RIGHT
PHONES
2
PHONES
INPUT
OUTPUT
LEFT
RIGHT
PHONES
1
PHONES