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NIVIEM EQP-1
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NIVIEM EQP-1

Classic Passive Program Equalizer

Inspired by the legendary Pultec EQP-1A Program Equalizer (1961). True parallel low boost/cut topology enabling the famous 'Pultec trick' — the most emulated equalizer in audio history, now in plugin form.

TBA
ManualQuick Start
Version
1.0
Expected
January 2026
Formats
VST3, Audio Units
Platforms
macOS, Windows
Features

What Makes It Special

Authentic Pultec Topology

True parallel low boost/cut architecture with separate turnover frequencies (6× for boost, 13.5× for cut). This enables the famous 'Pultec trick' — simultaneous bass boost and low-mid cut.

Original Frequency Points

All authentic frequencies: 20, 30, 60, 100 Hz (low) and 3, 4, 5, 8, 10, 12, 16 kHz (high). The legendary 16 kHz 'air' setting used on countless hit records.

Authentic Boost/Cut Ranges

Matching original specifications: Low boost 0-13.5 dB, Low cut 0-17.5 dB, High boost 0-18 dB. Musical, gentle slopes that affect adjacent frequencies naturally.

Variable Bandwidth Control

Adjustable Q (0.5-1.5) for the high frequency boost section. From broad, subtle enhancement to focused, surgical presence.

High Cut Filter

2nd-order Butterworth lowpass at 5, 10, or 20 kHz. Tame harshness, create vintage character, or leave wide open at 20 kHz.

Real-Time Spectrum Analyzer

CRT-style display with EQ curve overlay and live spectrum analysis. Visualize the Pultec trick in action — see the characteristic frequency response curve.

Specifications

Inspired ByPultec EQP-1A Program Equalizer (1961)
Low Frequencies20, 30, 60, 100 Hz
High Frequencies3, 4, 5, 8, 10, 12, 16 kHz
Low Boost0 - 13.5 dB
Low Cut0 - 17.5 dB
High Boost0 - 18 dB
High BandwidthQ 0.5 - 1.5
High Cut5, 10, 20 kHz (12 dB/oct Butterworth)
Output Gain-12 to +12 dB
Boost TurnoverFrequency × 6
Cut TurnoverFrequency × 13.5
Sample Rates44.1 kHz – 192 kHz

Highlights

  • The famous 'Pultec trick' — boost bass while cutting low-mids simultaneously
  • Authentic parallel topology with different turnover frequencies
  • All original EQP-1A frequency selections preserved
  • 16 kHz 'air' setting — the mastering engineer's secret weapon
  • Real-time spectrum analyzer with EQ curve overlay
  • 19 factory presets: vocals, bass, drums, mix bus, mastering, creative
  • Used at Abbey Road, Capitol, Motown, and every major studio
  • Chris Lord-Alge, Bob Ludwig, Al Schmitt signature sound

Under the Hood

Parallel boost/cut: boost turnover at f×6, cut turnover at f×13.5
1st-order shelf filters for low section (6 dB/oct)
2nd-order peaking filter for high boost
2nd-order Butterworth lowpass for high cut (12 dB/oct)
8ms coefficient smoothing for click-free changes
2048-point FFT spectrum analyzer with Hann window

System Requirements

macOS

  • macOS 11.0 (Big Sur) or later
  • Intel or Apple Silicon (Universal Binary)
  • AU or VST3 compatible host

Windows

  • Windows 10 or later (64-bit)
  • VST3 compatible host