The Pultec EQP-1A was designed by Eugene Shenk and Ollie Summerland in 1951 at Pulse Techniques Inc. Its unique passive EQ design with tube makeup gain created a sound that remains unmatched for musicality. Original units now cost $4,000-$8,000+ and are highly sought-after. Stam Audio developed the SA-EQP1A to bring this legendary tube EQ within reach of modern studios, using the same point-to-point construction techniques and component selection that defines their boutique approach.
SA-EQP1A
2016–2023
The Stam Audio SA-EQP1A is a faithful recreation of the legendary Pultec EQP-1A program equalizer, widely considered the holy grail of tube EQs. Known for its unique ability to simultaneously boost and cut at the same frequency—creating resonant shelving curves that enhance without harshness—the EQP-1A has shaped the sound of countless classic recordings. The SA-EQP1A captures this magical tube EQ character with authentic point-to-point wiring and premium components. This passive EQ design uses tube makeup gain stages to provide the warmth and musicality that digital EQs cannot replicate. The signature low-end trick—boosting and cutting simultaneously at 30, 60, or 100Hz—creates tight, punchy bass that sits perfectly in mixes. The high-frequency section offers smooth, airy boosts that flatter vocals, acoustic instruments, and program material. Every SA-EQP1A is hand-built with the same transformers and tube topology as vintage Pultec units. (Discontinued — superseded by EQP-1AM)