Manual Monitor & Talkback Controller Model 2381 Stereo volume, source and monitor control with cue mix and talkback functions
Manual MTC 2381 Model 2381 Version 1.0 – 7/2004 Design: Wolfgang Neumann This manual contains a description of the product. It in no way represents a guarantee of particular characteristics or results of use. The information in this document has been carefully compiled and verified and, unless otherwise stated or agreed upon, correctly describes the product at the time of packaging with this document.
Contents Introduction .............................................................................................. 4 Before You Begin ....................................................................................... 5 Power Supply ............................................................................................ 5 Rear Panel Graphic & Cabling Overview ................................................... 6 Connectors/General Advice ............................................................
Introduction The Monitor & Talkback Controller MTC 2381 combines volume level control, source switching and loudspeaker management for stereo monitoring with comfortable talkback and cue mixing functions.
Before you begin IMPORTANT: Before you operate your MTC, first check carefully whether the local voltage setting corresponds to the switch setting on the rear panel! If not, and the voltage is in one way or another, incorrect, you will either experience an immediate fuse burn through (if the setting is lower than the supplied power) or, if the power is 110-120 V at a 220-240 V input switch setting, the MTC will simply not function correctly.
Musician's Signal i. e. Metering, Recorder, etc. Alternative Talkback Monitoring Stereo Sources (Audio Player, etc.
Connectors General Advice The MTC enclosure is EMC-safe and effectively shielded against HF interference. Nonetheless, you should carefully consider where you place the unit to avoid electrical disturbances. The MTC and all devices to be connected should be turned off before connections are made or changed to avoid damage to your equipment and ears.
Rear Panel/Outputs Slave Out Slave Out L The balanced 1/4 inch Slave Out jacks provide for summed output of all active 2Tr inputs (Mix, 2Tr A to 2Tr D). As an example, the monitor signal may also be routed to a recording medium, or, while one listens to a CD player, the output may simultaneously be routed to a DAW. You may likewise connect stereo metering equipment.
Rear Panel/Power Connection and Switches Mains Input Mains Input The included AC power cord is connected to this 3-prong IEC connector to supply operating current to the unit. Power Switch Power You will find the main power switch right beside the Mains Input. The blue power LED on the MTC front panel indicates that the power supply is tuned in. Power Supply Voltage Switch 220-240V~50Hz Fuse: 315 mA This slide switch toggles the power source between 220-240 V and 110-120 V.
Operation/Switch Functions Status LEDs An LED over each front panel switch indicates activity by illuminating when its corresponding switch is turned on. If the Talkback function is activated by an external switch, the Talk LED will nonetheless illuminate (a footswitch or key/button connected via the rear panel Footswitch Input is described in Rear Panel Inputs/Footswitch on page 7). Musician Musician The Musician switch routes a musician’s signal to the MTC monitor buss.
Operation/Switch Functions SP 1 to SP 3 SP 1 These switches can toggle up to three loudspeaker pairs on and off (and may serve as individual mute switches). Mono Mono The Mono function creates a mono sum from the stereo signal left and right channels and provides for a mono-compatibility check of the stereo mix. This switch functions globally on all three monitor outs, and both speakers of a pair receive the mono signal.
Operation/Control Functions Control functions are divided in three areas: Cue Mix, Talkback and Control Room. The Cue Mix section contains all the necessary controls to set up a monitor mix for the musician. IMPORTANT: Be careful to ensure that all MTC input signals are properly adjusted and provide proper levels.
Operation/Control Functions Control Room/Source Blend Source Blend With this control you can adjust the relative levels between the Musician and Mix and/or 2Tr signals for the control room monitor speakers. Musician Master Volume The master volume potentiometer globally controls volume for the three monitor speaker pairs. This analog control regulates the audio signal directly to avoid any coloration/distortion typical of VCAs, DCAs, etc.
Specifications 14 Frequency range 10 Hz - 120 kHz (+/- 3 dB) Input impedance via RCA/unbalanced 100 kOhm Output impedance via XLR/balanced 500 Ohm THD + N 0 dBu input level +10 dBu input level +20 dBu input level 0.005 % 0.002 % 0.003 % Noise (A-weighted) -89.4 dBu Max. input level Balanced, RCA Unbalanced, RCA +21 dBu +19 dBu Dynamic Range (balanced/unbalanced) 108,4/110,4 dB CMRR › 70 dBu Power Consumption 10 W Dimensions H x B x T (mm): 91 x 272 x 220 Weight 2.5 kg/5.
Guarantee All SPL products come with a two-year manufacturer’s guarantee against defects in material or assembly from the date of purchase. End users are supported in the two-year guarantee through their distributor or dealer. In such cases, please contact your dealer for full guarantee conditions and service. Direct SPL product support requires product registration. Please fill out the guarantee card enclosed in the package legibly in printed letters and send it directly to SPL.
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