Klark Teknik DN540 specifications Compressor section, Front Panel

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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		7	6	5	4	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