MX624 Six Channel Stereo Mixer with Two Zone Outputs USER'S GUIDE
IMPORTANT SAFETY INSTRUCTIONS - READ FIRST This symbol, wherever it appears, alerts you to the presence of uninsulated dangerous voltages inside the enclosure that may be sufficient to constitute a risk. of shock This symbol, wherever it appears, alerts you to important operating and maintenance instructions in the accompanying literature. Please read the manual. Read instructions Retain these safety and operating instructions for future reference. Heed all warnings printed here and on the equipment.
OVERVIEW The ART MX624 Six Channel Stereo Mixer with Two Zone Outputs is a versatile rack mount mixer that combines six independent stereo input channels and routes them to two stereo zone outputs. The first three input channels can also accept a balanced mono XLR microphone input. +48 Volt phantom power may be independently selected on each of the mic inputs. The first channel's mic input can be used to control, when enabled by a front-panel switch, the ducking of all other channels.
CONNECTIONS Rear Panel Connections Inputs MIC 2 and MIC 3 Each of these two female XLR connectors provides a balanced mono input for a microphone, which typically outputs lower signal levels. An additional 26 dB of gain is provided to boost the mic signal to near line level. The mono signal of each mic input is fed to both left and right stereo channels and mixed with the line-level input signals from the RCA jacks of the same channel. This combined signal may be assigned to either Zone 1 or Zone2.
Additionally, the ZONE 1 and 2 BUS INPUTS may come in handy as extra stereo inputs. Note, however, that these inputs do not have their own level control and the zone assignment is hard-wired. Outputs ZONE 1 and 2 OUT (LEFT and RIGHT) These four 1/4-inch mono (TS) jacks provide a stereo signal from each of the two zones of your MX624 to destination devices, such as amplifiers, powered speakers, or main mixers.
OPERATION Front Panel Controls DUCK Switch Pushing this switch in enables ducking in response to the signal from the MIC 1 input. Pushing this switch again returns it to the out position and disables ducking. The switch is illuminated by a red LED that is part of the ducking circuit, so it provides useful feedback about the amount of ducking applied as well as indicating basic on/off status. With ducking enabled, the LED is dimly lit at the onset of ducking with relatively low level microphone signals.
ZONE 1 / ZONE 2 Assign Buttons There are two zone assign buttons for each channel. When both of these buttons are in the out position, that channel's signal does not get routed to either zone. Pushing the ZONE 1 button in assigns that channel's signal to Zone 1, where it is mixed with any other signals assigned to Zone 1. Pushing the ZONE 2 button assigns that channel's signal to Zone 2, where it is mixed with any other signals assigned to Zone 2.
Rear Panel Controls There is a group of ten DIP switches located towards the right end of the back panel, when viewed from the rear. These switches are nominally all in the up or OFF position. Their function is described below. Rear Panel DIP Switches MIC PHANTOM POWER Switches (1-3) These numbered switches control the application of phantom power (+48V) to the corresponding numbered MIC XLR connectors. In the OFF position (up), no phantom voltage is applied.
DUCK Control Switches (4-6) These switches allow you to alter the operation of the ducking action. The two sensitivity switches adjust the level which the signal from MIC 1 needs to exceed for ducking to occur. Moving just switch 4 (DUCK SENSITIVITY +6dB) down (ON position) makes the ducking detector 6dB more sensitive, so that ducking occurs with a lower mic level.
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WARRANTY INFORMATION Limited Warranty (USA only) Applied Research and Technology will provide warranty and service for this unit in accordance with the following warrants: Applied Research and Technology, (ART) warrants to the original purchaser that this product and the components thereof will be free from defects in workmanship and materials for a period of three years from the date of purchase.
SERVICE The following information is provided in the unlikely event that your unit requires service. 1. Be sure that the unit is the cause of the problem. Check to make sure that the unit has power supplied, that all cables are connected correctly, and that the cables themselves are in working condition. You may want to consult with your dealer for assistance in troubleshooting or testing your particular configuration. 2. If you believe that the ART unit is at fault, go to www.artproaudio.com.
SPECIFICATIONS Input Connections XLR female balanced (Mic, channels 1-3) RCA unbalanced (Line Inputs 1-6, Left & Right) 1/4-inch TRS unbalanced stereo (Bus Inputs, Zone 1 & 2) Output Connections 1/4-inch TS unbalanced (Zone 1 & 2 Out, Left & Right) Input Impedance 4k Ohms (Mic), 10k Ohms (Line), 10k Ohms (Bus) Output Impedance 200 Ohms (Zone 1 & 2) Frequency Response 20 Hz – 20 kHz (+0, -1 dB) (channels 1-6 in, zone out) THD <0.
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