Solid State Logic X-Logic Series owner manual Rack EQ Module, Frequency Sections, B-1

X-Rack EQ Module

B.The EQ Module

B.1 Connection

Tda

O

The module input and output gains can be set to operate at a nominal level of either +4dBu or –10dBV, using a switch on the connector panel. To select the appropriate level for the equipment you are connecting to, please check the operating manual for your mixer or DAW. The switch should be released for +4dBu operation: push it in for –10dBV operation.

B.2 Operation

The EQ module is a 4-band equaliser that can be switched between two different
	XR625
sets of curves, one based on the latest version of the classic SSL E Series EQ and the
other based on SSL’s G Series EQ.

The G-EQ button		K switches the EQ from ‘E’ operation to ‘G’ operation.
The IN button	L	switches the entire section in and out of circuit.	E	7	KH
				R

B.2.1 Frequency Sections	L	KR
	KFR	LL

The different frequency sections are as follows:
HF Section:	Frequency range 1.5kHz – 22kHz		E	7	L	M
LF Section:	Gain ±20dB			K		R
	Frequency range 40Hz – 600Hz				FX	a
	Gain ±16.5dB					K
The HF and LF sections provide shelving equalisers with variable turnover
frequency and a gentle slope. Selecting the ‘G-EQ’ button provides a slightly steeper						L
slope for both sections with a degree of overshoot/undershoot (depending on
whether you are boosting or cutting) below the selected HF frequency (or above the			E	7	FX	KFH
selected LF frequency). Selecting ‘		’ (‘Bell’) in either mode switches the equaliser		FM		KFX
to a peaking curve.					FL	LFH
HMF Section:	Centre frequency 600Hz – 7kHz
	Gain ±20dB					LLH
	Continuously variable Q (0.7 – 2.5)			XH
					QH	XHH
LMF Section:	Centre frequency 200Hz to 2.5kHz
	Gain ±20dB		E	7
	Continuously variable Q (0.7 – 2.5)
Normally, at any Q setting, the bandwidth of the HMF and LMF sections varies with
gain, whereby an increase in boost or cut increases the selectivity of the EQ. This
type of EQ can sound effective when used at moderate settings; the gentle Q curve lends itself to the
application of overall EQ on combined sources and subtle corrective adjustments to instruments and
vocals.
When the EQ is switched to ‘G-EQ’ operation, at any given Q setting the bandwidth of the HMF and LMF
sections varies with gain such that an increase in boost or cut increases the selectivity of the EQ. This type
of EQ can sound effective when used at moderate settings; the gentle Q curve lends itself to the application
of overall EQ on combined sources and subtle corrective adjustments to instruments and vocals.

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