Solid State Logic SSL E Series EQ Module for API 500 Series RackThe Solid State Logic SSL E Series EQ Module for API 500 Series Rack is an API 500 series "lunchbox" style rack module with circuitry from the classic SSL 4000 E Series console channel strip. This sound has been heard on countless recordings throughout the 1980s to the present. The module features two different EQs that were found on editions of the console produced between 1981 and 1989, each with a unique response curve and tonal character. The two