Allenheath MIXWIZARD3 20S User Manual download pdf (Page 15)

20S User Guide 15

The MONO Input Channel

+48V Switches +48VDC to the channel input XLR for powering

microphones or DI boxes that need phantom power. The power is

current limited through 6k8 ohm resistors to pins 2 and 3.

WARNING: Do not connect unbalanced sources or cables

to inputs with phantom power selected. To avoid loud clicks

always mute the channel before switching +48V on or off and

when plugging or unplugging microphones.

PAD (LINE) Press this switch to select the channel TRS jack LINE

input. Release the switch to select the XLR MIC

input. The XLR

normals through the TRS socket. With nothing plugged into the line

input the switch therefore becomes a PAD for the mic XLR. It

attenuates the input signal by 20dB for connection to high level

microphone or line sources up to +30dBu.

GAIN Adjusts the input sensitivity to match the connected source to

the internal 0dBu operating level of the channel. Provides a variable

50dB range from +10 to +60dB gain (mic), or -10 to +40dB (line, pad

selected). The gain should be set using PFL so that the console

meters average ‘0’ with loudest moments lighting ‘+6’. Reduce gain if

the red peak indicator lights.

HPF Switches in the channel high pass filter. This attenuates

frequencies below 80Hz by 12dB per octave. The filter is pre-insert,

pre-EQ. Select the HPF to reduce low frequency noise such as microp

hone popping, stage noise and tape transport rumble.

EQ A 4-band semi parametric EQ provides independent control of

four frequency bands. HF and LF are shelving filters which affect high

frequencies above 12kHz, and low frequencies below 80Hz

respectively. HM and LM are bell shaped peak/dip filters which affect

frequencies around a centre point which can be swept from 500Hz to

15kHz and 35Hz to 1kHz respectively. These have a width (Q) of 1.8.

All bands can be boosted or cut by up to 15dB and have a centre

detent 0dB position.

Check for the best microphone selection and placement before using

the EQ. Start with the EQ set flat and apply only as much boost or cut

as is really needed. When dealing with problem frequencies cut rather

than boost where possible.

10- 10

GAIN

4060

PRE

SIG

PK!

PAN

AUX

MUTE

PFL

PRE

POST

AUX

POST

-15

+15

180

35Hz

-15

400

250

+15

(LINE)

700

500Hz

-15

15k

+15

HPF

+48V

PAD

EQ IN

+20

+15

+10

0dB

-5

-10

-15

-20

20 50 100 200 500 1k 2k 5k 10k 20k

10k5k2k1k500200100502010

-40

-35

-30

-25

-20

-15

-10

-5

0dB

20k10k5k2k1k5002001005020

-20

-15

-10

-5

0dB

+10

+15

+20

+15

+10

0dB

-5

-10

-15

-20

20 50 100 200 500 1k 2k 5k 10k 20k

1 2 ... 10 11 12 13 14 15 16 17 18 19 20 ... 31 32

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Allenheath MIXWIZARD3 20S User Manual Page 15

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