Solid State Logic EEQMK2 500 Series Equalizer Module

The Solid State Logic EEQMK2 E-Series EQ 500 module captures the iconic sonic character of the early-80s Solid State Logic SL 4000 E console-one of the most influential recording tools in modern music history. Famous for shaping the sound of countless hit records from the 1980s to today, the original 611E equalizer design continues to be cherished for its unmistakable tone, precision, and musicality. This same design also lives on in SSL’s contemporary ORIGIN console, proving its timeless relevance in professional audio production.

At the heart of the E-Series EQ module are the classic “Black-242” and “Brown-02” EQ circuits, which offer two distinct tonal flavors drawn directly from different revisions of the SL 4000 E console. Producers can instantly switch between the smoother, more rounded Brown EQ and the more focused, assertive Black EQ, giving unmatched flexibility for shaping vocals, instruments, and full mixes. Each variant retains its original response curves and behavior, faithfully preserving the nuances that engineers have relied on for decades.

The module provides a powerful and versatile 4-band EQ architecture, including fully parametric LMF and HMF bands with variable Q for precise tone sculpting. High and Low bands feature optional bell curves for added shaping control, allowing users to tailor the EQ to a wide range of musical styles. With its authentic circuitry and flexible feature set, the E-Series EQ delivers the unmistakable SSL sound-musical, characterful, and engineered for professionals who demand exceptional sonic performance.

Product Specifications:

Material: Aluminum chassis with brushed steel front panel (MK2 update for modern aesthetics)

Connectors: Standard 500 Series edge connector for I/O

Format: API-compatible 500 Series (single slot)

Frequency Response: 20 Hz to 20 kHz (±0.5 dB, typical for SSL SuperAnalogue design)

THD + Noise: <0.005% at 1 kHz (0 dBu input, unity gain)

Noise Floor: <–90 dBu (unweighted, 20 Hz to 20 kHz)

Max Input Level: +24 dBu

Max Output Level: +26 dBu

CMRR: >60 dB at 1 kHz

EQ Gain Range: ±16 dB per band

Q Range (Parametric Bands): 0.5 to 2.0 (continuous)

Shelf Slope: 6 dB/octave (traditional design)

Power Requirements: Powered via rack slot (+16V DC / –16V DC; ~130 mA typical; no phantom power required)

Product Weight: 1.1 lbs (0.5 kg)

Product Dimensions (L × W × H): 6" × 1.5" × 5.25"