Solid State Logic 82S6XL090A 4.5Expander/Gate, 4.6Filters Section, Installation and Operation

Installation and Operation

4.5Expander/Gate

The Expander/Gate section can act either as a ∞:1 Gate or, when the EXP switch is pressed, as a 2:1 Expander.

RANGE – Determines the depth of gating or expansion. When turned fully anti-clockwise, the Expander/Gate section will be inactive. When turned fully clockwise, a range of 40dB can be obtained.

COMPRESSOR	T/HOLD				GATE	T/HOLD
0
	3	6	10	14	20	0
FAST						FAST	EXP
ATK						ATK
+10	-20				-30	+10
RELEASE	RATIO			RELEASE		RANGE

		LIN
		REL
.1	4	1	.1	4	0	40

THRESHOLD – Variable hysteresis is incorporated in the threshold circuitry. For any given ‘open’ setting, the Expander/Gate will have a lower ‘close’ threshold. The hysteresis value is increased as the threshold is lowered. This is very useful in music recording as it allows instruments to decay below the open threshold before gating or expansion takes place.

RELEASE – This determines the time constant (speed), variable from 0.1 – 4 seconds, at which the Gate/Expander reduces the signal level once it has passed below the threshold. Note that this control interacts with the Range control.

FAST ATT – Provides a fast attack time (100µs per 40db). When off, a controlled linear attack time of 1.5ms per 40dB is selected. The attack time is the time taken for the Expander/Gate to ‘recover’ once the signal level is above the threshold. When gating signals with a steep rising edge, such as drums, a slow attack may effectively mask the initial ‘THWACK’, so you should be aware of this when selecting the appropriate attack time.

The green LEDs in the display section indicate Expander/Gate activity (the amount of gain reduction).

4.6Filters Section

In common with the original E Series Channel strip, a pair of high- and low-pass Filters are provided. Both Filter controls incorporate bypass switching which is activated when turned fully anti-clockwise; turning either control up will put that band in circuit, illuminating the LED adjacent to the control to indicate this state. The Filters are normally placed post- the EQ but can be routed to different audio paths within the module. Both Filters normally exhibit a 12dB/octave but pressing the BLK switch in the EQ section will modify the slope of the high-pass Filter to 18dB/octave – see Section 4.7 overleaf for more detail on this switch. Section 5 describes the routing combinations in more detail but, briefly, these buttons function as described below.

FILTERS		8	KHz
			4
DYN	INPUT	12	3.5
S/C
		OUT	3

	Hz
70	200
20	300

OUT 350

DYN SC – The Filters are switched into the sidechain of the Dynamics section. The Equaliser can be switched into the sidechain independently. Note that DYN SC overrides the INPUT function (see below).

INPUT – Moves the Filters to put them in circuit immediately post the Channel Input section. This allows the Filters to be used to clean up signals before compressing them. Selecting Dynamics ‘PRE EQ’ will allow the compressed signal to be EQ’d.

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