TECHNICAL SPECIFICATIONS

• Circuit Design: Based on the legendary E-Series "Black Knob" 242 Console EQ

• Format: 500 Series (VPR Alliance & GDIY 51X compatible)

• EQ Type: 4-band semi-parametric with switchable bell/shelf

• Gain Range: ±18 dB per band (with center detent for easy recall)

• Input/Output: Balanced THAT 1246 input & THAT 1646 output stages

• Output Stages Power Requirements: Standard ±16 V DC (500 Series rack)

DETAILED FEATURES

• Four-Band Precision Control:

  • Low Band: 30 Hz – 450 Hz (switchable Shelf/Bell)

  • Low-Mid Band: 200 Hz – 2.5 kHz (fully parametric with adjustable Q)

  • High-Mid Band: 600 Hz – 7 kHz (fully parametric with adjustable Q)

  • High Band: 1.5 kHz – 16 kHz (switchable shelf/bell)

• Integrated Filters: Dedicated 80 Hz Low-Cut and 8 kHz High-Cut (24 dB/oct) for instant signal cleanup

• Premium Audio Path: High-headroom design featuring original WIMA capacitors and low-noise operational amplifiers

• Professional Build Quality: Dual-layer PCB with immersion gold finish for maximum durability and easy soldering

WHAT'S INCLUDED IN THE KIT?  

This is a full DIY kit including all parts for a successful build:

• Powder-coated black front panel with high-quality printing

• All electronic components (resistors, capacitors, ICs, and THAT chips)

• Full set of high-quality Sifam knobs

(Note: This product requires assembly and soldering skills. A professional assembly guide is available in the "Build Manuals & Specs" tab.)

Help yourself and others in the corresponding GDIY Help Thread