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Toa Powered Mixer Operating Instruction Manual TOA POWERED MIXER Model MCX-106 TOA ELECTRIC CO., LTD. KOBE, JAPAN Contents General Description Features Front Panel [Input Section] Front Panel [Output Section] Front Panel [Stereo Cassette Recorder Section] Front Panel [Patch Bay & Bus Link] Rear Panel Connection Examples Input Connections How to get a good mix. Recording Level Setting Type of Cassette Tape Maintenance of Stereo Cassette Deck Block and Level Diagrams Specifications Characteristic Diagrams Appearance Precautions 1. XLR Type Audio Connector 2. Description of components and functions on the The connectors are wired as follows. MCX-106. The pin 1 is ground (shield), the pin 2 cold (low, Descriptions may vary, depending on each manu- minus), the pin 3 hot (high, plus). facturer. In our Operating and Instruction Manual explanation of components and functions is made according to our usage for them. MCX-106™ Operating Guide A Few Words about design: 6. One-octave equalizer. The MCX™ is quite an unusual product, but the 7. Patch bay. reasoning behind its design was quite simple .... we 8. Headphone cue/monitor system. wanted to intergrate all the basic components of a 9. Three-hundred watt power amplifier. sound reinforcement system and a recording studio 10. Road case. into a single, transportable package. Each of these "components" functions independently The basic components of the MCX™ are as follows: of the others, although some do share common signal 1. Six-channel main mixer. processing and control circuitry. For example, the 2. Six-channel on-stage monitor mixer. main mixer, effects mixer, and recording mixer all 3. Six-channel special effects mixer. make use of the same input equalization on each of the 4. Six-channel recording mixer. six channels. And the input trim control performs the 5. Stereo tape deck. same function for all four mixing sections. — 1 — General Description The MCX-106 is a compact self-powered mixer with a Microprocessor controlled stereo cassette deck, designed to allow recording a live demo tape, performing to pre-recorded program material, recording sound on sound with an external tape source, and simultaneously performing as a six-channel "powered" main sound system and a six- channel independent monitor mixer. The MCX-106 features: six input channels, a 300 watt power am plifier, 9-band graphic equalizer, automatic compressor, reverb effect, fluorescent bargraph meter, power amplifier protection circuitry, and a complete patch bay. Each input channel features: input trim control with LED peak indicator, pre-EQ foldback send, 3-band EQ, post-EQ recording level and pan controls, post-reverb/effects send, Lo- Z balanced XLR input and Hi-Z unbalanced 1/4" input. The built-in cassette deck features: full logic cassette mechanism control, dbx noise reduction system, zero return and cue functions, automatic tape selector. All these unique functions are integrated into a ruggedly construct and portable package, offering unlimited applications for school, church, band, performing group, etc. The MCX-106 is a "first of its kind" product, providing such a wide variety of versatility. Features 1. Built-in Stereo Cassette Recorder with micro- Each Channel processor control 1. Input Trim Control with LED peak indicator 2. Six Input Channels 2. Pre-EQ foldback send 3. 300 watt Power Amplifier 3. 3-Band EQ 4. 9-band Graphic Equalizer with Bypass Switch 4. Post-EQ recording level and pan controls 5. Auto-Comp™ Compression Circuitry with LED 5. Post reverb/effects send indicator 6. Lo-Z Balanced XLR Input 6. Reverberation Effect with 2-band dedicated EQ 7. Hi-Z Unbalanced 1/4" Input 7. Fluorescent Bargraph Metering— assignable 8. Power Amp Protection Circuitry with indicator Stereo Cassette Recorder 9. Complete patch Bay with Buss-Link™ 1. Full Logic Cassette Mechanism Control 10. Aux. Input with Stereo Balance and Level 2. dbx® Noise Reduction System Controls — assignable to PGM, FB, and Rec L & R 3. Automatic Tape Selector with Indicator (normal, Busses CrO2 Metal) 11. Headphone Monitoring/Cueing System 4. Headphone Output with Level Control 12. Independent Stage Monitor (FB) Mix 5. Tape Transport Remote Control (start/stop) 6. Tape Pitch Control (±10%) 7. Zero Return with Automatic Cue 8. 3-Digit Tape Counter — 2 — Front Panel, Input Section Peak Indicator (PEAK) The peak indicator lights when the pre or post EQ signal level reaches 3dB below clipping, Foldback Control (FB) giving a visual reference for Input Trim Control (TRIM) The Foldback control deter- optimum setting of the trim con- The input trim adjusts the gain trol. mines the level of signal assign- of the head-amp stage of the as- ed to the foldback mixing buss, sociated channel, providing 39 thus setting the level of that dB of gain control. When the channel in the on-stage monitor trim control is set to the "10" mix. position, the nominal input levels of the low-Z and high-Z inputs are — 55dB and —35dB re- spectively. At the "0" position the levels are -16dB and +4dB. High Equalizer Control The trim of each channel should (HIGH EQ) be adjusted so that the peak LED The high EQ control alters the j u s t begins to light, or only high frequency response of the flashes occasionally. This will input channel, providing ±13dB ensure lowest distortion levels at 10kHz, and ±15dBat 20kHz of and optimum signal to noise continuously variable active ratio. shelving equalization. The "0" detented position provides flat audio response. Recording pan Pot (REC PAN) This control assigns the record- Middle Equalizer Control ing signal from each channel to (MID EQ) the recording L and R mixing The mid EQ control provides busses. At the center position, ±15dB of continuously variable the pan pot routes the signal active peaking equalization at equally to the L and R mixing 2kHz. and has a flat audio re- busses. Panning from one side to sponse when set to the "0" the other gradually assigns the detented position. input signal to either the record- ing L or R mixing bus exclusive- ly! Low Equalizer Control Recording Level J Control (LOW EQ) (REC LEVEL) The low EQ control provides This control adjusts the level of ±13dB at l00Hz and ±15dB at signal assigned to the tape deck 50Hz (of continuously variable via the recording pan pot and active shelving equalization. stereo L and R recording busses. The "0" detented position pro- Rotating the control clockwise vides flat audio response. increases the amount of signal assigned to the recording L and R busses and thus the level of that input in the "recording mix." Reverb/Effects Control (REV/EFF) This control determines the? Input Level Control level of signal assigned to the re- (INPUT LEVEL) verb effects buss. Rotating the The level control provides con- control clockwise increases the tinuously variable adjustment amount of reverb effect in that of the channel output to the channel. program mixing buss, thus de- termining the level of that channel in the main sound High Impedance Connectors system mix. Since the reverb/ (HIGH Z) effects signal is "post" this con- Low Impedance Connectors These connectors are unbalanc- trol, an increase in the level of the (LOW Z) ed, standard 1/4" phone jacks channel's output will also result The XLR connectors are low im- with an input impedance? of 50k in a corresponding increase in pedance, electronically balanced ohms, and an input level of he reverb effect of that channel. inputs with an input impedance —35dB when the trim control is The nominal level of the input of 1k ohms. set to "10". When a plug is insert- level control is at the "10" posi- ed into the high —Z input, the cor- tion. responding XLR connector is automatically switched out of the input circuitry. — 3 — Front Panel, Output Section Aux Recording Balance Reverberation High Equalizer — - Reverberation Low Equalizer Foldback Master Control (FB) (AUX REC BAL) Control Control The FB master control adjusts This control a d j u s t s t h e level (REV HIGH EQ) (REV LOW EQ) the overall combined signal balance of the aux in, L and R The high EQ control alters the The low EQ control alters the level of the six independent signals routed to the L and R high frequency response? of the low frequency response of the channel foldback sends, and mixing busses. reverberation signal. The "0" de- reverberation signal. The "0" de- thus the level of the entire on- At the center position, the bal- tented position provides flat tented position provides flat stage monitor mix. ance control routes the signal audio response. audio response. equally to the L and R mixing Program Master Control (PGM) busses. Recordig Level Control - Playback to Program Control The PGM control adjusts the (EFF REC LEVEL) (TAPE TO PGM) overall combined signal level of Auxiliary Input Recording This control sets the level of This control adjusts the level of the six independent channel Level Control reverb (or external effects) in playback signal routed to the level controls, and thus the l evel (AUX REC LEVEL) the recording mix, via the effects program mixing buss, and thus of the main sound system. This control sets the level of return pan pot. the level of the internal tape? stereo L and R signal (from an source in the main mix. external source connected to the Graphic Equalizer AUX INPUT) assigned to the re- Effect Recording Pan Control (EQUALIZATION) cording busses, via the AUX (EFF REC PAN) Playback to Foldback Control The graphic equalizer is 1/1 REC BAL control. This control assigns the reverb (TAPE TO FB) octave with 9 independent active or external effects signal to the This control adjusts the level of bands (filters), providing 12dB recording L and R mixing bus- playback signal to the foldback of boost or cut at each center fre- Auxiliary Input to ses.
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