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1. Schematic Diagram

Stereo

Ch.6

Aux Input

Input

(dB)

-20

-40

-60

evel

Pan

Level

Two-conductor (twisted pair) shielded cable is

best for all XLR type connections. Belden No. 8412, or

its equivalent, is an excellent cable due to its heavy con-

struction. This type of cable should be used for all por-

table applications. Snake cables containing multiple

shielded pairs must be handled very carefully because the

leads tend to be fragile, and a broken conductor is diffi-

cult to repair.

If low level and high level lines (e.g., micro-

phones and mixer line outputs), or if either of these lines

and speaker cables are run parallel for long distances,

crosstalk may be significant. In fact, the crosstalk (sig-

nal leakage between cables) can cause an electronic feed-

back loop, oscillation, and possibly damage to the

equipment. To minimize crosstalk, physically separate

low level (microphone) cables from speaker cables by the

greatest feasible distance. At any point where cables meet,

run low level cables perpendicular to high level or speaker

cables. If low and high level or speaker cables must be

run parallel and in close proximity to one another, they

should be bundled separately.

5.1 Microphone Input

The microphone input is an active balanced type

with a nominal impedance of 1200 ohms. Its noise per-

formance is best with a 200 ohm microphone. The Mic

input connector is a standard 3-pin XLR female with the

shield on pin 1, the (+) in-phase connection on pin 2, and

the (-) out-of-phase connection on pin 3.

5.2 Input Pad

The Pad is a 20dB attenuation switch on the rear

panel for use with each XLR microphone input. It should

normally be left in the "out" position for best signal to

Ch.6

Ch.5

PUSH

Pad

(-20dB)

Stereo

Mono/Phones

Outputs

Left

Right

Mono

Ch.4

PUSH

Pad

-20dB

(-20dB)

Operating Manual - MX-206 Stereo Microphone Mixer

-L-

-R-

Clip

Output

Stereo

Headphones

-6

-12

-20

Output

Phones

noise ratio and should only be used when the input is be-

ing overdriven with the Input dB (gain) switch at its mini-

mum setting.

5.7 Tape/CD Input - Tape Output

The stereo inputs on RCA connectors have a

nominal operating level of -10dBu to match most tape

decks and CD players. The tape outputs are -10dBu "pre-

master", so they are not affected by the settings of the

output controls.

5.8 Mono Transformer Balanced Output

The mono transformer output uses a male XLR

type connector and provides total isolation for 600 ohm

lines. Pin 1 is ground, pin 2 is (+), and pin 3 is (-). This

output is controlled by the Mono level, with a nominal

operating level of +4dBu.

Note: The transformer-balanced output is de-

signed to drive up to +24dBu into a 600 ohm load. Be-

cause of the nature of an output transformer, the output

level increases as the impedance of the terminating load

becomes higher than 600 ohms. Whereas a "direct-

coupled" output stage like that of the stereo outputs will

not change as the load changes, any transformer used in

an audio path is affected by its termination impedance.

Since line level inputs on audio devices are typically 10K Ω

or higher, expect a slight increase (2.5dB) in output level

when driving high impedance inputs with the mono trans-

former output. The output meters will reflect the levels

present on the stereo outputs, regardless of the load on

the transformer output.

5.9 Stereo Outputs

The Stereo Outputs are controlled by the left and

right master. They are 1/4" pseudo-balanced TRS jacks

with a nominal operating level of +4dBu into any load.

Ch.3

PUSH

Pad

(-20dB)

MX-206

Stereo

Six Channel

Microphone Mixer

Power

Phantom

Ch.2

Ch.1

PUSH

Pad

(-20dB)

Pad

(-20dB)