The EVO QPI is a zero-draw, conductive parallel digital filter engineered for discerning audiophiles and performance-focused electronics users who demand cleaner power, lower noise, and a more immersive listening and viewing experience.
 
Designed to elevate the signal path without drawing power from the wall, the EVO QPI brings refined power conditioning to high-resolution audio systems, premium displays, and digitally controlled electronics.
 
Celebrating its 20th anniversary in 2026, the QPI traces its roots to the late-1990s recording industry and has become one of our most trusted filter designs for listeners and electronics enthusiasts who value clarity, dimensionality, and long-term reliability.
 
Developed as part of our Smart Grid technology platform, the QPI series is designed to draw zero watts from the wall.
 
With universal digital filtering, the EVO QPI is well suited for high-performance audio/video systems, digitally controlled appliances, computers, digital electronics, and flat-panel displays.
 
Portable power factor correction (PFC) and bidirectional digital noise filtering help create a quieter electrical environment, supporting greater stability, nuance, and depth across connected systems, with PFC benefits typically noticeable within 3 to 4 days of installation.
 
Filter bandwidth: 800 kHz–5.5 GHz
Noise reduction: -75 dB evenly across the frequency bandwidth
 
Audio / Video Benefits:
Produces an organic, tube-like sound quality.
Reduces upper-midrange glare while enriching harmonic tone.
Reveals fine recording details without sounding dry or etched.
Creates a musical presentation with strong stage reproduction, layering, and depth.
Improves contrast, black level, color saturation, and three-dimensional video depth.