User Manual

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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.

REMOVABLE

PHOENIX

CONNECTOR

Instruction Sheet

IS-MIX1

Issued:6-1-14

Lowell Manufacturing Company

100 Integram Drive Pacific, Missouri 63069 U.S.A.

Call: 800-325-9660

Fax: 636-257-6606 Click: www.lowellmfg.com

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.

Technical Specifications

Dimensions (inc. rubber feet): 19" wide x 1.80" high x 9.875"deep (483mm wide x 45.7mm high x 250.8mm deep)

Total Harmonic Distortion: < .05%

Weight: 7.0LBS. (3.18KGS) Shipping Weight: 12.35LBS. (5.60KGS) (Weights include rack ears) Color: Black

AC Supply Voltage: 120VAC, 50/60Hz, Power Consumption: 5W

Outputs: Main Output - unbalanced RCA jack 775mV, 280W, Tape Output - unbalanced RCA jack 75mV, 280W

Signal to Noise Ratio: Mic 60dB, Aux 65dB (from 0dB output level)

Input Channels 1-6: Microphone inputs - balanced screw terminals: 1mV(to reach 0dB 775mV output), 600W

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

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”.

100mV(to reach 0dB 775mV output), 28kW

Frequency Response: 20Hz-20kHz +1dB

Mix Bus Link: RCA jack. 5mV, 1kW Use only to link the mix buses of up to a maximum of four (4) MIX1 mixers.

Line Output - Balanced screw terminals 775mV, 600W, Mic Output - Balanced screw terminals 7mV, 50W

Summary of content (8 pages)

PAGE 1
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 1 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.
PAGE 2
MIX1 Block Diagram CH1 CH2 CH3 CH4 CH5 CH6 AUX MIC +GND MIC +- PAD AUX PAD AUX MIC +GND MIC +AUX PAD AUX MIC +GND MIC +- PAD AUX PAD AUX CH7 AUX PAD MIX CH2 Volume Control MIX CH3 Volume Control MIX CH4 Volume Control MIX CH5 Volume Control MIX CH6 Volume Control Slide Switch A A MIX CH1 Volume Control Peak Led Tape Out Mix Bus Mute Control Circuit Mixing Circuit Low Cut Filter ON CH7 Volume Control B MASTER Volume Control Main Out Aux Level Main Output + Mic - Bal
PAGE 3
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 .
PAGE 4
MICROPHONE INPUT WIRING Microphones may be connected to the three (3) screw terminals for the “MIC” input of channel 1 through channel 6. Note: the input channel chosen will depend on the muting scheme chosen. For example: If the microphone will have the highest priority and will mute all other channels, connect to the channel 1 “MIC” input and set the “MUTE” switch to “2-8”.
PAGE 5
BALANCED MIC AND LINE OUTPUTS The MIX1 balanced “MIC” level and “LINE” level outputs are available at screw terminals. These outputs are fed after the master volume control and low cut filter. _ LINE + GND TAPE OUTPUT The MIX1 “TAPE OUT” connection is an RCA phono jack. The connecting output cable should be wired with the pin “hot” or “+” and with the sleeve “common” or “-”.
PAGE 6
TYPICAL SYSTEM CONFIGURATIONS Basic Paging System with One or More Paging Microphones Paging Microphone Paging Microphone Paging Microphone Set “MUTE” switch to “A-B” Music Source Aux In Mic In CH1 MIX1 Aux In Mic In CH2 Main Out Aux In Mic In CH3 Balanced Line O ut Aux In Mic In CH4 Balanced Mic Out Aux In Mic In CH5 Tape Out Aux In Mic In CH6 Mix Bus Aux A Aux B CH7 Optional EQ1 Equalizer PA250 Power Amplifier Loudspeaker System Basic Paging System with Telephone Paging Lowell
PAGE 7
Basic Sound System with 10 Mic Jacks and 2 Music Source Microphone Lowell WP1-NC3FD Wall Plates Typical Set “MUTE” switch to “A-B” Microphone Music Source #1 Music Source #2 Set “MUTE” switch to “A-B” Aux In Mic In CH1 MIX1 Aux In Mic In CH2 Main Out Aux In Mic In CH3 Balanced Line Out Aux In Mic In CH4 Balanced Mic Out Aux In Mic In CH5 Tape Out Aux In Mic In CH6 Mix Bus Aux A Aux B CH7 Aux In Mic In CH1 MIX1 Aux In Mic In CH2 Main Out Aux In Mic In CH3 Balanced Line O ut
PAGE 8
IMPORTANT SAFETY INSTRUCTIONS Read these instructions. Keep these instructions. Heed all warnings. Follow all instructions. Do not use this apparatus near water. Clean only with a dry cloth. Do not block any ventilation openings. Install in accordance with manufacturer’s instructions . Do not install near any heat sources such as radiators, registers, stoves, or other apparatus (including amplifiers) that produce heat. Do not defeat the safety purpose of the polarized or grounding-type plug.