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ASHLY MX-206 [5/8] Operating manual mx 206 stereo microphone mixer

Operating Manual - MX-206 Stereo Microphone Mixer

noise ratio and should only be used when the input is

being overdriven with the Input dB (gain) switch at its

minimum setting.

5.7 Stereo Line In - Stereo Line Out

The stereo line inputs on RCA and 3.5mm con-

nectors have a nominal operating level of -10dBu to match

most consumer level audio products. The stereo line out-

puts 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 out-

put level when driving high impedance inputs with the

mono transformer 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.

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., microphones

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 (signal leakage

between cables) can cause an electronic feedback loop,

oscillation, and possibly damage to the equipment. To

minimize crosstalk, physically separate low level (micro-

phone) 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 perfor-

mance 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

ASHLY MX-206 [5/8] Operating manual mx 206 stereo microphone mixer

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