TECHNICAL SPECIFICATIONS

• Circuit Design: Based on the classic German Neumann W492 broadcast EQ circuitry

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

• EQ Type: 4-band equalizer (shelving outer bands/bell mid bands)

• Gain Range: ±15 dB boost/cut per band (with center detent for easy recall)

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

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

DETAILED FEATURES

• Four-Band Precision Control:

  • Low Band: 50 Hz – 400 Hz (shelf mode)

  • Low-Mid Band: 60 Hz – 1 kHz (bell mode)

  • High-Mid Band: 1 kHz – 16 kHz (bell mode)

  • High Band: 3 kHz – 10 kHz (shelf mode)

• Integrated Filter:

  • Low-Cut filter: 80 Hz/160Hz (24 dB/oct) – internally switchable

• Premium Audio Path: High-headroom design featuring low-noise operational amplifiers, precision resistors, and original WIMA capacitors for pristine audio quality

• Professional Build Quality: Dual-layer PCB with immersion gold finish for maximum signal transfer, 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 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. Interactive assembly guides are available in our Build Manuals section.)