Lowell MIX1 User Manual
MIX1
INSTALLATION SHEET
AND OPERATORS MANUAL
MIX1 General Description:
The MIX1 is a mixer/preamplifier that includes 6 channels that each include a microphone input at screw terminals
and an aux input at an RCA jack. A seventh aux-only channel has a front panel switch to select one of two rear
panel aux input jacks. A mute-select switch allows either for channel 1 (Mic input or Aux input) to mute all other
channels, or for channels 1 through 6 to all mute the channel 7 aux-only input. The post-master-volume-control
outputs include a balanced line level output at screw terminals, a balanced mic level output at screw terminals, and
an unbalanced main output at an RCA jack. A pre-master-volume-control tape output is provided at an RCA jack.
An RCA jack is also provided to link the mix bus of one MIX1 to another MIX1 so that all inputs appear at all outputs.
A low cut filter switch is included which can reduce the bass response for use in reverberant spaces (like
gymnasiums) and act as a horn protection filter (trumpet protect) when paging horns are being used.
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Technical Specifications
AC Supply Voltage: 120VAC, 50/60Hz, Power Consumption: 5W
Input Channels 1-6: Microphone inputs - balanced screw terminals: 1mV(to reach 0dB 775mV output), 600W
power supplies (sold by others) may be used to provide phantom power for the MIX1 mic inputs.
Input Channel 7: Aux inputs – Switchable on front panel - RCA jack “A” or RCA jack “B”.
Mix Bus Link: RCA jack. 5mV, 1kW Use only to link the mix buses of up to a maximum of four (4) MIX1 mixers.
Outputs: Main Output - unbalanced RCA jack 775mV, 280W, Tape Output - unbalanced RCA jack 75mV, 280W
Line Output - Balanced screw terminals 775mV, 600W, Mic Output - Balanced screw terminals 7mV, 50W
Aux inputs - unbalanced RCA connectors: 140mV(to reach 0dB 775mV output), 24kW
Note: Mic and Aux input on same channel are internally mixed. Use one or the other – not both.
The Mic inputs do not provide phantom power for condenser microphones. External phantom
100mV(to reach 0dB 775mV output), 28kW
Frequency Response: 20Hz-20kHz +1dB
Signal to Noise Ratio: Mic 60dB, Aux 65dB (from 0dB output level)
Dimensions (inc. rubber feet): 19" wide x 1.80" high x 9.875"deep (483mm wide x 45.7mm high x 250.8mm deep)
Weight: 7.0LBS. (3.18KGS) Shipping Weight: 12.35LBS. (5.60KGS) (Weights include rack ears) Color: Black
Optional Accessories (sold separately):
Lowell Manufacturing offers a full line of 19" equipment cabinets, wall mount shelves, rack mount AC power panels,
AC power strips, and cooling fans that can be used to install the Lowell Amplifier products.
See www.lowellmfg.com for product details.
Lowell Manufacturing Company
Call: 800-325-9660
Fax: 636-257-6606 Click: www.lowellmfg.com
100 Integram Drive Pacific, Missouri 63069 U.S.A.
Total Harmonic Distortion: < .05%
REMOVABLE
PHOENIX
Instruction Sheet
CONNECTOR
IS-MIX1
Issued:6-1-14
1
CH1
CH2
CH3
CH4
CH5
CH6
CH7
MIC
GND
MIC
AUX
MIC
GND
MIC
AUX
MIC
GND
MIC
AUX
AUX
AUX
MUTE
MIX1 Block Diagram
PADAUX
PAD
PADAUX
PAD
PADAUX
PAD
2-8
A-B
MIX
MIX
MIX
MIX
MIX
MIX
Slide
A
Switch
B
Slide
Switch
+
+
-
+
+
-
+
+
-
A
B
CH1
Volume
Control
CH2
Volume
Control
CH3
Volume
Control
CH4
Volume
Control
CH5
Volume
Control
CH6
Volume
Control
CH7
Volume
Control
Mute
Control
Circuit
Mixing
Circuit
Low
Cut
Filter
ON
OFF
Slide
Switch
MASTER
Volume
Control
Peak Led
Tape Out
Mix Bus
Main
Out
+
Mic
-
+
Line
-
Aux Level
Main Output
Balanced
Microphone
Level Output
Balanced Line
Level Output
MIX1 Front Panel
1
2 3 4 5 6 8 9
MIX1 Rear Panel
2
5
-
+
1
3
1
CH1 Volume Control
2
CH2 Volume Control
3
CH3 Volume Control
4
CH4 Volume Control
5
CH5 Volume Control
6
CH6 Volume Control
7
CH7 Volume Control
8
CH7 A/B Select Switch
9
Master Volume Control
15
1
4
111
2
1
07
2
6
1
6
1
8
1
7
1
3
Power Cord 120VAC
1
4
Main Output RCA Jack
1
5
Tape Output RCA Jack
1
6
Mix Bus Link RCA Jack
1
7
Low-Cut Filter On/Off Switch
1
8
Mute Select Switch (2-8/A-B)
1
9
CH6 Mic Input (screw terminals)
2
0
CH5 Mic Input (screw terminals)
2
1
CH4 Mic Input (screw terminals)
1
2
9
0
2
5
Balanced 600W Line Output (screw terminals)
2
6
Balanced 600W Mic Output (screw terminals)
2
7
CH7-B Aux Input RCA Jack
2
8
CH7-A Aux Input RCA Jack
2
9
CH6 Aux Input RCA Jack
3
0
CH5 Aux Input RCA Jack
3
1
CH4 Aux Input RCA Jack
3
2
CH3 Aux Input RCA Jack
3
3
CH2 Aux Input RCA Jack
2
2
1
2
2
3433323130292827
2
3
4
1
0
Master Power Switch
1
1
Peak LED (Red)
1
2
Power On LED (Green)
2
2
CH3 Mic Input (screw terminals)
2
3
CH2 Mic Input (screw terminals)
2
4
CH1 Mic Input (screw terminals)
Lowell Manufacturing Company
Call: 800-325-9660
Fax: 636-257-6606 Click: www.lowellmfg.com
3
4
CH1 Aux Input RCA Jack
100 Integram Drive Pacific, Missouri 63069 U.S.A.
2
Instruction Sheet
IS-MIX1
REMOVABLE
PHOENIX
Issued:6-1-14
CONNECTOR
Getting Started:
Please study carefully the “IMPORTANT SAFETY INSTRUCTIONS” that are given on page 8 before applying power
to your MIX1 mixer/preamplifier.
INSPECTION
This unit was carefully checked and packed before leaving the factory. However, it is always a good idea to inspect
the shipping container and unit for indications of improper handling. If the unit has been damaged, make an
immediate claim to the dealer or distributor from whom it was purchased. If the unit was shipped to you, notify the
transportation company without delay, saving all packing materials, in order to process the claim.
INITIAL PERFORMANCE CHECK
Before installing the MIX1, continue the inspection by running a quick performance check. Feed input signals to the
mic or aux input channels and connect the main output to a test amplifier and speaker. MAKE SURE THE UNIT IS
GROUNDED BEFORE TESTING. In this way you can check the basic operation of the MIX1 before actually
installing the unit and making all of the final terminations required for the permanent installation. If shipping damage
has resulted in the MIX1 being inoperable out of the box, call Lowell Customer Service to arrange for a replacement.
MOUNTING THE MIX1
The rubber feet on the MIX1 chassis allow it to be
placed on a counter top or on a wooden or metal
wall-mount shelf. Rack mounting ears have been
included so the MIX1 can be mounted to any
standard 19" equipment cabinet using standard
10-32 Phillips-head machine screws (like the Lowell
model RS or RSP rack screws) with integral plastic
washers to protect the finish of the front panel of the
MIX1. Mount the rack mounting ears to the MIX1
Chassis Screws
using the two (2) chassis screws on each side of the
unit as shown.
POWER WIRING
The MIX1 is equipped with a North American style NEMA 5-15P attached AC cord with a 3-prong grounded plug for
a 120 VAC 50/60 power source. WARNING: THE MIX1 MUST BE EARTH GROUNDED.
GENERAL WIRING AND INSTALLATION GUIDELINES
DO NOT run microphone cables near AC power wires, data cables, telephone cables, or speaker wiring to avoid
picking up extraneous signals in the sound system.
DO NOT run high impedance unbalanced wiring more than 20' to avoid picking up noise and affecting the frequency
response of the sound system.
DO NOT run speaker output cables near data cables, telephone cables, or other low voltage wiring that could pick
up the signal from the higher level speaker cables.
DO use shielded cable for all microphone and line level cables (except the balanced 600 ohm input line from a
telephone system may be twisted pair cable).
DO make sure that all speakers are wired in phase with each other.
DO make sure there are no short circuits on the loudspeaker lines before connecting them to the amplifier output.
AUX INPUT CONNECTIONS
The MIX1 Aux inputs are standard high-impedance unbalanced RCA phono jacks. Aux input
cables should be wired with the pin “hot” or “+” and with the sleeve “common” or “-”.
Lowell Manufacturing Company
Call: 800-325-9660
Fax: 636-257-6606 Click: www.lowellmfg.com
100 Integram Drive Pacific, Missouri 63069 U.S.A.
Pin
Sleeve
+
_
Instruction Sheet
IS-MIX1
Issued: 6-1-14
3
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