The HLabs EQ169+ is a mono mastering equaliser that takes the classic Studer 169 EQ topology and re-engineers it for modern precision, repeatability, and mastering flexibility. Where the original Studer design offered smooth, musical tonal shaping, the EQ169+ pushes the concept further with stepped rotary controls for exact recall, expanded filter choices, and selectable gain ranges for different workflows. It is designed to serve equally well as a mastering EQ, bus processor, or high-end tone-shaping tool on individual tracks.
At the low end, the HLabs EQ169+ provides precise control through its innovative “low-resonance” high-pass filter with ten tuned frequencies, combined with a switchable low-shelf EQ at 20 Hz or 60 Hz. This pairing makes it possible to tame subsonic rumble or gently sculpt the body of bass-heavy material without compromising musicality.
For the midrange, the HLabs EQ169+ offers two independent “Presence” filters with a total of 22 frequency points from 150 Hz up to 7 kHz, each with a smooth Q of approximately 1.0, allowing engineers to address everything from boxy mids to vocal presence with pinpoint accuracy. The high end is equally refined, with a natural-sounding shelf that can be tuned to 20 kHz for traditional sheen or extended to 35 kHz for airy, ultra-high clarity.
Internally, the HLabs EQ169+ is entirely discrete and hand-assembled using through-hole technology. Behind every knob lies an 11-position rotary switch, ensuring repeatable settings and precise stereo matching when used in pairs. Precision resistors and capacitors are carefully matched to within ±0.1 dB, guaranteeing consistency between units.
The circuit is transformerless on both input and output stages, maintaining maximum transparency, while relay-operated bypass ensures the original signal remains completely unaffected when disengaged. A stepped output gain trim offers an additional ±3 dB in 0.5 dB increments, enabling fine adjustment of level after EQ processing.
With a maximum input and output level of +22 dBu, an exceptionally low distortion figure of 0.005 % at 0 dBu, and a signal-to-noise ratio greater than 108 dB, the HLabs EQ169+ is a mastering-grade tool that combines classic analogue musicality with modern precision. Whether shaping the overall tonal balance of a finished mix, adding subtle colour to a bus, or sculpting the character of a single instrument, the HLabs EQ169+ provides engineers with the finesse, reliability, and versatility demanded in today’s professional studios.
Features
- Inspired by the Studer 169 EQ topology, re-engineered for mastering
- Innovative high-pass filter with ten selectable frequencies for musical low-end control
- Low-shelf filter at 20 Hz or 60 Hz for shaping bass response
- Two “Presence” filters offering 22 selectable mid frequencies from 150 Hz to 7 kHz
- Natural high-shelf filter tuned at 20 kHz or 35 kHz for open, airy highs
- Fully stepped rotary switches behind every knob for precise recall
- Discrete through-hole component design with precision resistors and capacitors
- Gain-matched to within ±0.1 dB between units for accurate stereo mastering
- Stepped output gain trim ±3 dB in 0.5 dB increments
- Relay-operated true bypass for transparent signal integrity
- Transformerless input and output stages for maximum transparency