SPECIFICATIONS
Frequency Response
RCA Inputs and
Line Inputs
Input Impedance
RCA Inputs 1-3
Mic Input
Priority Line
Buss Input
Maximum Input Level
RCA Inputs 1-3
Priority Mic
Priority Line
Buss Input
Output Impedance
RCA Outputs
XLR Outputs
Maximum Output Level
RCA Outputs
XLR Outputs
T.H.D.
RCA In/RCA Out
Mic In/RCA Out
Rise Time
Priority Mic
Ducking Threshold
+.05 dBm at 20 Hz to
-1.3 dBm at 20 kHz
or - 3dBm 3 to 30 kHz
10 k ohms unbalanced
1.2 k ohms balanced
20 k ohms balanced
20 k ohms unbalanced
+23 dB unbalanced
-5 dB balanced
+23 dB balanced
+23 dB unbalanced
100 ohms unbalanced
100 ohms balanced
+23 dB
+23 dB
.06% at 1K Hz unity gain
.05% at 1K Hz 40 dB gain
12 uS
-40 dB
Priority Line
Ducking Threshold
Release Time
Mic Priority
Line Priority
Range of Level Pots
Common Mode Rejection
Mic Input
Gain Mic Input
Stereo Separation
Equalizer Gain/Cut
Bass
Lo Mid
Hi Mid
High
(See Response Plot)
Signal to Noise Ratio
at Unity Gain
RCA in to RCA out
Range of Remote Volume
Power Consumption
Size
Width
Height
Depth
Weight
-20 dB
5 seconds
3 seconds (Normal)
30 seconds (Slow)
-60 to +20 dB
>50 dB at 50 Hz
-40 to +45 dB
>60dB
25 dB at 20 Hz
14 dB at 250 Hz
14 dB at 1.6 K Hz
15 dB at 10 K Hz
76 dB
45 dB
.2 Amps AC Maximum
19“ with rack mount ears
17 3/8“ without rack mount ears
2 1/8“ with rubber feet
1 13/16“ without rubber feet
6“ from front of knobs to back
connectors
5 ¼“ rack depth mount
7 ¼ pounds
U.S.Audio
32.00 kHz
Frequency LOG
20.00 Hz
30.0 dBr
20.0 dBr
10.0 dBr
0.00 dBr
10.0 dBr
20.0 dBr
SYSTEM TONE CONTROL FREQUENCY RESPONSE
BLOCK DIAGRAM
VOLUME
+
_
1
2
3
+18 VOLT PHANTOM POWER ALWAYS ON
PRIORITY MIC
VOLUME
THRESHOLD, ONE SHOT,
RELEASE RAMP AND VC
CIRCUITS
THRESHOLD, ONE SHOT,
RELEASE RAMP AND VC
CIRCUITS. THIS INPUT DUCKS
-70 ALL THE TIME
BALANCED INPUTS
PRIORITY LINE RIGHT/MONO
RCA
INPUT 3
RIGHT
LEFT
RCA
INPUT 2
RIGHT
LEFT
RCA
INPUT 1
RIGHT
LEFT
BUSS INPUTS
VOLUME
VOLUME
VOLUME
VCA
VCA
VCA
VCA
SUM
SUM
SUM
SUM
SUM
SUM
BASS
LO-MID
HI-MID
TREBLE
MASTER
VOLUME
STEREO/MONO
2
1
3
2
1
3
LEFT
BALANCED
OUTPUT
RIGHT
BALANCED
OUTPUT
P2L
+18 VDC
POWER ON
POWER SUPPLY
120 VAC/230 VAC
JUMPERS
-18 VDC
GROUND
GROUND
LIFT
CHASSIS
GROUND
ON/OFF
LO CUT FILTER
24dB PER OCTAVE
-3dB AT 120Hz
VC
VC
MIC INPUT
DUCKING -20/OFF/-70
3 POSITION SWITCH
18 VOLTS
VC IN
+
_
+
_
+
_
Unplug the AC cord of the unit. Remove
the four screws on the top right and left sides and
loosen the four screws on the bottom left and right
sides. The top cover can now be removed by lifting
straight up. The jumpers are located behind and to
the left of the select switch. Pin 1 of each jumper is
labeled as shown. The four priority audio jumpers
(P1L, P2L, P1R, P2R) and two priority control
jumpers (VCP1, VCP2) are shown in the default
position with the paging mic having top priority
and the line input having priority 2. To reverse this,
change all 6 jumpers from pin 1 and 2, to pins 2
and 3.
The line priority ducking release time
jumper is shown in the default position of 3
seconds with pins 2 and 3 connected. To lengthen
the release time to 30 seconds, change the jumper
to pins 1 and 2.
Jumpers for left channel ducking
disable are shown in the default position with
ducking active. To defeat this feature for either
priority 1 or priority 2 or both, change the
appropriate jumpers from pin 1 and pin 2 to pins 2
and 3. Remove jumper P1L and P2L completely to
remove the priority audio from the left channel
audio output.
Double check all jumpers for proper
positioning. Place the top cover back on the unit.
Start all four of the top screws before tightening all
eight screws.
JUMPER LOCATION
+
Music Page Mixer
whirlwind
99 Ling Road . Rochester, NY 14612
Phone 800 733-9473 . Fax 585 865-8930
Email: [email protected]
US Audio has made every effort to ensure that your
equipment is received in the same perfect condition it was in
when it left the factory. Please inspect your product for any
signs of damage during shipping and report them to your dealer
so that a claim can be presented to the shipper. We recommend
that you save your packaging material for use in the unlikely
event that you need to return your equipment for service.
UNPACKING
Thank you for selecting the MPM1V and the MPM1 music
and paging mixers. These high quality, versatile mixers can be
used in countless applications to provide simple, easy control of
multiple audio and video sources. Features include three stereo
inputs for audio connection of CD and cassette players, radio
tuners, VCR and DVD players, etc.; two priority inputs which
allow paging and automatic music override for announcements
or a jukebox; and a four band equalizer for enhancing the overall
sound of the system. The MPM1V has three composite video
inputs allowing VCR, DVD, cable and satellite box video
switching simultaneously with the stereo audio. Both units have
stereo and mono audio outputs and remote master volume
control capabilities.
Housed in a single rack space unit with removable rack
ears and designed for continuous operation, the MPM1 includes
all the features necessary to operate most single zone sound
system installations in night clubs, sports bars, health clubs,
offices, restaurants or anywhere paging and/or priority inputs are
required.
INTRODUCTION
U.S.Audio
OPERATIONS MANUAL
1
1
PRIORITY 2
PRIORITY 1
1
LINE PRIORITY
DUCKING RELEASE
1
1
C
H
A
N
N
E
L
S
E
L
E
C
T
P2L
P1L
P1R
P2R
1
1
1
1
1
1
1
V
C
P
2
V
C
P
1
DUCKING
DISABLE
DUCKING
DISABLE
30 SEC
3 SEC
1
1
VCP1
VCP2
P2R
P1L
P1R
MIC
LINE
PRIORITY CONTROL JUMPERS
LINE PRIORITY DUCKING RELEASE
PRIORITY 2
LEFT DUCKING DISABLE
PRIORITY 1
PRIORITY
AUDIO
JUMPERS
1
1
1
1
