Wolff Audio Freq

The Wolff Audio FREQ is a highly versatile 4-band parametric equalizer designed for the 500 Series format. Engineered by Paul Wolff, a legendary name in EQ design, and named by Terry Lewis, this unit blends classic Proportional Q EQ characteristics with modern enhancements for surgical precision and tonal shaping. Whether you're making broad tonal adjustments or tight notches, the FREQ delivers exceptional accuracy and flexibility, making it a must-have for any professional audio setup.

Key features include Proportional Q, where wider Q settings are used for subtle adjustments, and narrower Q settings are applied when making deeper cuts. The HIGH and LOW bands offer a WIDE mode, acting as a gentle 3-octave-wide filter instead of a traditional shelving EQ, minimizing unwanted out-of-band clipping. The two MID bands feature a 1/3 Octave lock for precise frequency notching, helping eliminate problem frequencies with surgical precision. A Cinemag nickel and steel blended output transformer ensures transparent signal integrity with minimal coloration. Additional features include a hardwire relay bypass, a green signal indicator, and low distortion (<0.03%) for clean, high-headroom performance. Whether used for subtle tonal shaping or aggressive correction, the FREQ is built to handle it all effortlessly.

• 4-Band Parametric EQ with Proportional Q for precise tone shaping.

• Wide & Narrow Q Modes for smooth boosts or surgical cuts.

• High & Low Bands with an additional WIDE mode for gentle shelving.

• Mid Bands with 1/3 Octave Lock for precise notching.

• Custom Cinemag Output Transformer for transparency and minimal coloration.

• True Hard-Wire Bypass switch for signal integrity.

• Green Signal Indicator for easy visual feedback.

• Low Distortion (<0.03%) and high headroom (+28 dBu clipping onset).

• 500 Series Format for compatibility with professional studio setups.

GENERAL:

• 500 Series format parametric equalizer

• Custom Cinemag nickel and steel blended output transformer

• Green signal indicator

• Power consumption: Less than 100mA per rail

EQUALIZATION FEATURES:

• 4-band parametric EQ with Proportional Q

• High Frequency (HF): 2K - 20K Hz, with "WIDE" mode (3-octave wide fixed filter)

• High-Mid Frequency (HM): 350 - 10K Hz, with 1/3 Octave Lock for surgical notching

• Low-Mid Frequency (LM): 75 - 2K2 Hz, with 1/3 Octave Lock

• Low Frequency (LF): 25 - 700 Hz, with "WIDE" mode (3-octave wide fixed filter)

• Proportional Q: Wide Q for minor adjustments, narrows as boost/cut increases

• 1/3 Octave Lock on mid bands for precise problem frequency control

PERFORMANCE & AUDIO QUALITY:

• Hardwire relay bypass switch (true bypass)

• Distortion: Less than 0.03% at 100Hz and higher

• Distortion primarily 3rd harmonic below 150Hz

• Clipping onset at +28 dBu