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Appendix
Equaliser
This is a four band equaliser that can be switched between two different sets of curves; one based on SSL’s ‘02’
(‘Brown Knob’) EQ and the other based on the latest version of the classic ‘242’ E Series (‘Black Knob’) EQ. High
and low pass filters are also available.
HF Band controls:
Frequency Variable from 1.5kHz to 16kHz
Gain Variable between ±15dB (‘02’)
Variable between ±18dB (‘242’)
‘Q’ (on ‘BELL’ setting) 0.8 (‘02’)
1.3 (‘242’)
HMF Band controls:
Frequency Variable from 600Hz to 7kHz
Gain Variable between ±15dB (‘02’)
Variable between ±18dB (‘242’)
‘Q’ Variable from 0.5 to 2.5 (‘02’)
Variable from 0.5 to 4 (‘242’)
LMF Band controls:
Frequency Variable from 200Hz to 2.5kHz
Gain Variable between ±15dB (‘02’)
Variable between ±18dB (‘242’)
‘Q’ Variable from 0.5 to 2.5 (‘02’)
Variable from 0.5 to 4 (‘242’)
LF Band controls:
Frequency Variable from 30Hz to 450Hz
Gain Variable between ±15dB (‘02’)
Variable between ±18dB (‘242’)
‘Q’ (on ‘BELL’ setting) 0.8 (‘02’)
1.3 (‘242’)
Filter controls:
Low Pass Frequency 3kHz to 16kHz (–3dB Point)
Low Pass Slope 12dB/octave
High Pass Frequency 20Hz to 350Hz (–3dB Point)
High Pass Slope 12dB/octave (‘02’)
18dB/octave (’242’)
Measurement Conditions
Signal applied to Line Input and measured at Output. EQ switched In. All EQ controls set centre as appropriate.
THD + N < 0.05% at +20dBu 1kHz
Frequency Response ±0.25dB from 20Hz to 20kHz
Output Headroom > +26dBu at onset of clipping
Noise < –73dBu