Toshiba MX-104 Input Connections, Connect low impedance outputs to high impedance inputs

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)

circuitry, so the usable signal level range is wide. Input impedances and levels are shown in the following table.

INPUT SPECIFICATIONS

		ACTUAL	FOR USE	SENSITIVITY*
CONNECTION	INPUT	LOAD	WITH	(PGM OUTPUT	CONNECTOR
		IMPEDANCE	NOMINAL	LEVEL +4dB)
CH1	LOW Z	OPEN	MICRO-	-60dB (0.78mV)	XLR TYPE NC3F
			PHONES
CH4	HIGH Z		LOWER IMP	-35dB (13.8mV)	PHONE JACK
			LINES
AUX			LOWER IMP,	-20dB (77.5mV)	RCA PIN JACK
					PHONE JACK
			LINES
GEQ			LOWER IMP,	+4dB (1.23V)	PHONE JACK
			LINES
PWR/AMP			LOWER IMP,	+4dB (1.23V)	PHONE JACK
			LINES

*Sensitivity is the level required to produce a program out level of +4dB. *0dB is referenced to 0.775V RMS.

All XLR Type connectors are electronic balanced. Phone jack is unbalanced.

If the line going from one piece of equipment to another is long (more than 5m), we

recommend that balanced outputs be connected to balanced inputs.

As is described in the beginning of the Operating Instructions Manual, the connectors of the MX-104 are wired as follows: Pin 1 is ground (shield). Pin 2 is cold (low, minus).

Pin 3 is hot (high, plus).

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