TubEQ

TubEQ is an authentic analog equalizer plugin that combines the musical character of two legendary EQs in a single powerful processor. It features the warm, surgical low-end of the iconic Pultec EQP-1A modeled using Wave Digital Filters, the modern clarity and presence of the Maag EQ4M mid/high frequency bands using State Variable Filters, and the harmonic richness of the 12AX7 tube from the original Pultec amplifier stage all finished with a precision brickwall lowpass filter at 24.5 kHz. From the studio-defining low-end warmth heard on countless classic recordings to the crystal-clear "Air" that makes modern productions sparkle, TubEQ delivers authentic analog sound with the convenience of modern digital control.

Features

• Authentic Pultec EQP-1A Low-End Modeling: Wave Digital Filter implementation of the legendary passive tube EQ circuit with authentic inductor-capacitor networks, supporting the famous "Pultec Trick" simultaneous boost and cut at low frequencies for enhanced weight and clarity. Three selectable frequency bands: 30 Hz, 60 Hz, and 100 Hz.
• Maag EQ4M-Inspired Mid/High Bands: Musical frequency points at 160 Hz (warmth/body), 650 Hz (vocal presence/clarity), and 2.5 kHz (definition/attack), plus a sweepable Air Band with six selectable frequencies (2.5 kHz to 40 kHz) for the legendary Maag "Air" open, sparkling highs that enhance perception of detail and space.
• 12AX7 Tube Character Modeling: Authentic modeling of the 12AX7 (ECC83) tube from the original Pultec EQP-1A amplifier stage, including subtle harmonic coloration, natural tube warmth, and authentic headroom behavior matching the original +21 dBm specifications. Variable Tube Input drive and Tube Level controls for dialing in the exact amount of tube character.
• Complete Analog Signal Path: From Pultec passive EQ through Maag mid/high processing to tube amplifier stage every component authentically modeled with interactive frequency behavior and natural phase relationships, just like the original hardware.
• Auto Makeup Gain: Intelligent automatic level compensation maintains consistent perceived loudness during EQ adjustments while preserving dynamic range and musicality.
• Precision Brickwall Filter: 12 dB/octave lowpass at 24.5 kHz prevents aliasing while preserving musical content and maintaining phase coherence in the audio band