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Operating Instruction Manual
TOA POWERED MIXER
Model MX-104
TOA ELECTRIC CO., LTD.
KOBE, JAPAN
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Contents General Description 2 Features 2 Front Panel [Names of components & their usage] 3 Rear Panel [Names of components & their usage] 4 Connection Examples 5 Input Connections 6 Block and Level Diagrams 7 Specifications 8 Characteristics Diagrams 9 Appearance 9 Precautions 1. XLR Type Audio Connector The connectors are wired as follows. The pin 1 is ground [shield), the pin 2 cold (low, minus), the pin 3 hot (high, plus). 2. Description of components and functions on the MX-104. Various des
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General Description The TOA MX-104 is a very compact, four channel self-powered mixer. It was designed to deliver maximum features and performance in a cost-effective portable PA package. The MX-104 features four input channels, one program output, and one Foldback output. The internal amplifier is rated at 100 watts into an 8 ohm load, and 150 watts into 4 ohms. Each input channel has an electronically balanced XLR connector, and a high- impedance unbalanced 1/4" phone jack. In addition, each c
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Front Panel Graphic Equalizer Power Amp Compression Reverb to Foldback Indicator Control (REV TO FB) (EQUALIZATION) High Equalizer Control The graphic equalizer is 5 inde- (COMP) This control adjusts the amount (HIGH) pendent active bands (filters), The Comp LED lights when the of reverb signal that is returned The high EQ control alters the providing 12dB of boost or cut at internal compressor is activated. to the foldback buss and thus the high frequency response of the The compressor is provi
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Rear Panel Power Switch (POWER) Cord Wrap The power switch is a three- The cord wrap is provided for position type with the middle convenient storage of the power position being the "off position. cord when the MX-104 is not in The MX-104 should be operated use. in the switch position which Caution - The power cord should produces the lowest amount of always be completely removed system hum. from the cord wrap prior to operation of the unit. This will insure maximum cooling of the Speaker Jacks
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Connection Examples SPEAKER SYSTEM (Self powered speakers MAIN SPEAKER SYSTEM for foldback TOA model SM-25A) From Speaker jack on Rear Panel KEYBOARD Low Z input should be connected with low impedance (50 ohm ~ 600 ohm) CASSETTE TAPE DECK microphones for playback MUSICAL INSTRUMENT — 5 —
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Input Connections Generally speaking, there are two rules to follow when connecting equipment outputs to the inputs of other equipment. 1. Properly match the impedances of the outputs and inputs. 2. Connect low impedance outputs to high impedance inputs. It goes without saying that not only input and output impedance matching, but also level matching should be taken into consideration. Each input channel of the MX-104 is provided with an Input Level Control that includes a negative feedback (NF)
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Block and Level Diagrams BLOCK DIAGRAMS LEVEL DIAGRAM — 7 —
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Specifications MIXER SECTION Maximum Voltage Gain Frequency Response INPUT to PGM out 64dB +0, -3dB 60Hz~20kHz (input LEVEL at "5" position) INPUT to FB out 64dB INPUT to GEQ out 64dB Total Harmonic Distortion AUX to PGM out 24dB 0.05% +4dB* at 1kHz. Input EQ Hum and Noise (Open) 50Hz ±15dB Shelving Equivalent Input Noise -130dB* (20Hz ~ 20kHz) 20kHz ±15dB Shelving Equivalent Input Noise -133dB* (IHF A) All level Controls Minimum -110dB* (IHF A) PGM Master at MAX and all Equalization input level
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Characteristics Diagrams LOW Z HIGH Z IN & INPUT EQ (LEVEL Control) GEQ HIGH Z IN. & INPUT EQ (set at "5") POWER AMP POWER BAND WIDTH POWER AMP T.H.D. vs POWER OUTPUT POWER AMP COMPRESSOR REVERBERATION FREQUENCY RESPONSE Appearance — 9 —
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TOA ELECTRIC CO., LTD. KOBE, JAPAN Printed in Japan 133-02-690-80
