Solid State Logic 611EQ E-Series EQ
Classic SSL analogue processing in 500-Series format with Twin EQ Design
The E-Series EQ Module for 500 Series racks reproduces the legendary sonic signature of an early 80's classic, the Solid State Logic SL 4000 E console channel strip, which has featured on countless classic recordings from the 1980's to the present.
The E-Series EQ Module features two different EQ's found on editions of the console produced between
1981 and 1989. Each EQ has unique response curves and tonal character.
Historically the type of EQ fitted in an individual console was distinguished by the colours used on the LF
knob caps so the two flavours have become known as the 'Brown' and 'Black' EQ's. On the E Series EQ
Module you can switch between these two different flavours of EQ that have been loved by generations of
"Brown Knob" EQ - the original SSL EQ, sweet and musical
15dB of cut/boost, and a special design that ensures the 3dB up/down points for each band fall at the
same musical interval from the center frequency. No matter where you cut or boost the 611EQ, the results
sound musical and natural.
"Black Knob" EQ - a more aggressive EQ for modern styles
In the mid-'80s, SSL developed the 242 EQ circuit, or the "Black Knob" EQ to be found on later E Series
consoles. It's more aggressive than the Brown Knob EQ, with up to 18dB of cut or boost, and a different
control law that gives you much tighter control over low frequencies. The module's BLK switch gives you
this alternative EQ characteristic at the press of a button.
Immortal SSL 4000 E Series circuitry"Black-242" and "Brown-02" twin EQ designVersatile 4 band channel EQBell curve option on HF and LFFully parametric LMF and HMF with QBased on classic 611E console channel strip
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