Chapter 4: Front Panel

Compressor section

Each compressor section houses six compressor parameter control knobs, a bypass switch and a hard knee switch, and two sets of six-LED meters (attenuation and level).

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10

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1

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8

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7

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2

 

 

 

 

 

 

 

 

 

Item

Type

Label

Function

 

 

 

 

 

 

1

Control knob

ATTACK

Adjusts the time taken for the compressor to respond

 

 

 

after an over threshold signal. (Envelope time

 

 

 

constant.)

 

 

2

Control knob

GAIN

Provides adjustment of up to 18dB of make up gain,

 

 

 

so that the level of the outgoing signal can be

 

 

 

matched to the incoming uncompressed signal.

3

Control knob

RELEASE

Adjusts the time taken for the compressor to recover

 

 

 

after an over threshold signal. (Envelope time

 

 

 

constant.)

 

 

4

Control knob

PRESENCE

Reduces compression at the mid-high frequencies

 

 

 

(vocal range), while allowing the low and high

 

 

 

frequencies to be compressed normally.

5

Pushbutton

HARD

Switches the compressor to hard knee. When this

 

 

 

button is switched off, the knee type is soft knee.

6

LED

Not applicable

On/off status indicator for the HARD knee

 

(orange)

 

pushbutton.

 

 

7

Control knob

RATIO

Controls the amount of compression applied to over

 

 

 

threshold signals.

 

 

8

LED meter

ATTEN

Gain reduction meter. The compressor meter has

 

 

 

1dB, 2dB, 3dB, 6dB, 10dB and 20dB LEDs. No

 

 

 

additional time constants are applied to the meter, so

 

 

 

that the actual envelope speeds can be easily seen.

 

 

 

The gain reduction meter continues to function

 

 

 

normally when the DN540 is set in bypass. The

 

 

 

bypass indictors are illuminated boldly to signal this

 

 

 

fact to the user.

 

 

9

Control knob

THRESHOLD

Adjusts the operating point of the compressor.

10

Pushbutton

BYPASS

Removes the compressor/dynamic filter from the

 

 

 

signal path.

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

DN540

 

 

 

 

14

 

Operator Manual

Page 26
Image 26
Klark Teknik DN540 specifications Compressor section, Front Panel