ALLEN & HEATH WZ20S User's Guide download pdf (Page 22)

22 WZ20S User Guide

Master Section

POWER ON Green LED lights when the console is powered.

HEADPHONES 1 OUTPUT Two outputs are available for stereo

headphones, one on the front panel, the other on the rear panel. This

is convenient when two headphones are required at the same time,

for example presenter and guest in a broadcast application. The

same signal is available from both. Headphones are available in

many different styles, impedances and volume ratings. To get the

best from your system we recommend that you use high quality

closed ear headphones in the range 30 to 600 ohms. 8 Ohm

headphones are not recommended.

WARNING Some headphones are more sensitive than

others and can produce higher output levels. To avoid damage

to your hearing start with the PHONES level control at minimum

and turn up only as much as is needed to maintain comfortable

listening level. Do not drive headphones at high listening levels

for long periods of time.

EXTERNAL INPUTS Two external inputs are provided in

addition to the mono and stereo channels. Each has a pair of TRS

jacks to accept a line level stereo source. For mono sources plug into

the L jack only leaving the R jack unplugged.

MIX1(2) ROUTING SWITCHES These underpanel tamperproof

switches determine how the external inputs are to be used. There are

two main applications:

Mix Inputs To connect additional stereo or mono sources to either

or both MIX1 and MIX2. For example, you could use these to return

the processed output from effects devices such as reverb, to accept

an input from a submixer, or for 2-track replay into the mix. EXT1 can

route to either or both MIX1 and MIX2. EXT2 can route to MIX2 only.

This would give you a dedicated effects return to each mix, or one

return routed to both. The pre-level signal feeds the monitor source

selector. Use a pointed object such as a pen to select MIX1 and/or

MIX2 routing switches as required.

Monitor Inputs To return sources to the monitor selector for

monitoring only. With both switches in the up position the signal feeds

the monitor source selector and is not affected by the level control.

This is the case when the input is used for monitoring only and should

not feed the main mix, for example checking a stereo recording or an

off-air broadcast signal. The tamperproof underpanel routing switches

prevent accidental operation. If the switch were accidentally pressed

the signal would route back on itself and cause feedback. Decide the

application of these inputs and set the switches accordingly.

EXT1(2) IN The rotary controls adjust the level of the external inputs

when routed to MIX1 or MIX2 or both as selected on the routing

switches above. Note that these do not affect the feeds to the monitor

selector. Operating level is –10dBV as standard but may be changed

to +4dBu by resoldering an internal link.

MIX2MIX1

30 30

10 10

010

EXT 1

DIM

EXT 2

MIX1

PFL

MIX2

MONO

AUX

SPLI T

PFL ENABLE

MONITOR

LOCAL

ALL UP =

MIX2

AUX1

AUX3

AUX2

AUX5

AUX4

AUX6

AUX

5-6

AUX

3-4

1-2

-3-3

MONITOR

AUX

MIX1

PFL

-12-12

-30

-20

-16

-20

-30

-16

-6

-9 -9

-6

LEV

PRG

MIX2

+16

PFL

+16

EXT 1

MIX2

EXT2

SPLIT PFL

POWER ON

MIX1

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ALLEN & HEATH WZ20S User's Guide Page 22

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