EQ-500 DIY partial kit version (PCB + frontplate)
The EQ-500 is a monophonic semi-parametric 500-series equalizer inspired by the Harrison MR-4 console (1980), delivering a precise, and transparent sound. Whether you're recording or mixing, this versatile EQ excels at shaping a wide range of sound sources with clarity.
The low and high bands feature selectable shelving or bell curves (proportional Q), offering flexible tonal shaping. The midrange offers three different bandwidths, providing precise control over the equalizer. Each band, along with the high-pass filter, includes an individual bypass function, providing full flexibility in your sound shaping.
The high frequencies are particularly smooth, adding sweetness and clarity without harshness. Whether enhancing vocals, acoustic instruments, or any other source, the EQ-500 delivers a silky, musical top end that complements the rest of your mix perfectly.
With its intuitive controls and exceptional performance, the EQ-500 is an essential tool for anyone seeking professional-quality sound with a smooth and refined character.
Key Features:
• 500-Series Format: Affordable, compact, and professional-grade for your 500-series rack.
• Semi-Parametric EQ: Provides precise control over low, mid, and high frequencies, preserving clarity.
• Selectable Shelving/Bell Curves for Low & High Bands for flexible tonal shaping,
• 3 Selectable Bandwidth of Mids for more accuracy and versatility.
• High-Pass Filter: Clean up unwanted low-end rumble, extending higher than typical filters for a tighter, more defined sound.
• Individual Bypass Function for Each Band & Filter for full flexibility and sound shaping control.
Transformerless
Through-hole quality components
Proportional Q
High-Pass filter : 26 Hz to 2.2 kHz (12dB/oct)
Low frequency band : 40 Hz to 800 Hz – Bell (2 widths) or Shelf mode
Mid frequency band : 400 Hz to 8 kHz – 3 bell modes : Narrow / Standard / Wide
High frequency band : 800 Hz to 15 kHz – Bell (2 widths) or Shelf mode
Maximum 15 dB of boost/cut gain per band (center detent on 0 dB)
Bypass switch on each section
Bi-color LED indicator for signal and clipping (with internal trimmable thresholds)
Power LED
Max consumption : 150 mA