Pultec EQP-1S3 Tube Program Equalizer

The Pultec EQP-1S3 is a rare variation of the legendary Pultec program equalizer, hand-built in the USA by Pulse Techniques. Designed with the same passive inductor-capacitor EQ circuit and tube-driven Class A amplifier stage as the iconic EQP-1A, the EQP-1S3 delivers the classic Pultec warmth and musicality—but with an expanded range of selectable frequencies for even greater tonal flexibility.

The EQP-1S3 provides extended low-frequency options (20, 30, 60, 100, 200 Hz), a wider range of high-frequency boosts (1–16 kHz with adjustable bandwidth), and smooth high-frequency attenuation (5, 10, 20 kHz). Like all Pultecs, it allows you to boost and attenuate the same frequency band simultaneously, creating unique, natural-sounding curves that add weight, clarity, and polish without harshness.

Key Features:

• Authentic tube-based Pultec program equalizer

• Expanded low-frequency boost & attenuate (20–200 Hz)

• Extended high-frequency boost (1, 2, 3, 4, 5, 8, 10, 12, 16 kHz) with bandwidth control

• High-frequency attenuation (5, 10, 20 kHz)

• Classic “Pultec trick” for tight, punchy low end

• Tube-driven Class A amplification for warmth and harmonic depth

• Hand-built in the USA using original-spec components

With its extended frequency range and unmistakable vintage tone, the Pultec EQP-1S3 is a versatile tool for vocals, bass, guitars, drums, mix bus, and mastering—delivering the same legendary sound-shaping power that has made Pultec EQs essential in world-class studios for over 60 years.