FEATURES
FOCUS:
Intuitive filter that focuses the energy in a source on the bass or treble ranges of the sound. Apparent loudness of source is maintained constant for meaningful A/B comparisons. SHIFT switch decreases turnover frequency for a different midrange response.
LO-CUT:
12 dB/oct filter that rolls off low frequencies, variable 20 to 530 Hz. Jumper selectable "Lo-Rider" mode transforms LO-CUT section into a low-frequency hi-cut section with variable resonance (hint: try this on a front of kick or Subkick mic and blend back in for incredibly deep and massive low end).
BUMP:
Variable resonance control for LO-CUT that adds a resonant "bump" at the corner frequency. Response from Bessel (full CCW), to Butterworth (12 noon), to slightly resonant (0.5 dB full CW). MORE switch increases resonance dramatically... sometimes MORE is more.
HI-CUT:
6 dB/oct filter that rolls off high frequencies, variable 500 Hz to 25 kHz. 0.5X switch shifts frequency range one octave lower, while simultaneously increasing slope to 12 dB/oct and adding slight resonance at corner frequency to retain apparent brightness (defeatable by jumper on PCB).
SPECIFICATIONS
DC coupled signal path with DC servo at input stage (no electrolytic caps in audio path)
Socketed audiophile grade op amps (LME49720), class A biased
Alps pushbutton switches
Wima polypropylene film capacitors
Panasonic FM series power supply decoupling capacitors
Custom 41 detent potentiometers
Custom molded knobs
Aluminum faceplate with anti-glare satin finish and "stealth" LED indicators
*+/- 16V power provided by API 500 series compatible rack, not included (We recommend API, Purple Audio and Radial racks)
