The heart of all PE- equalisers graphic section is a bank of 30 constant-Q band-pass filters equipped with Dynamically Laser Trimmed (DLT) hybrid circuits. The DLT-technology offers you ultra accuracy and optimally controlled phase and amplitude response. The constant-Q design preserves filter bandwidth independent from the amplitude control settings and therefore minimises the adjacent band interaction. Constant-Q reinforces the graphical representation of the true frequency response of the front panel's faders.Beside the graphic section, the PE-series features factory calibrated full parametric filters with unprecedented fine frequency tuning "vernier control", giving you the ultimate opportunity to fine-tune and remove unwanted sound wave as hum or potential feedback frequencies without disturbing the original overall frequency response. Typically, this enables an increase in system gain of 15 dB before feedback occurs.The PE-133MKII equaliser has both frequency adjustable high-pass and low-pass filter plus in/out switches on each equaliser section, for instant comparison with flat response.All potential overload points are continuously monitored by an extremely fast attack, slow release time peak detector circuit illuminating a LED indicator 2 dB before the clipping point is reached, warning the user to reduce the level before distortion occurs.In case of mains power failure, relays automatically bypass the equaliser by connecting each input directly to its output instantaneously. Application sound reinforcement, espacially monitor's equalisingfixed installationsFeatures Key featuresthe first ever and still unsurpassed EQ combining full-parametric and graphic equaliser in one deviceconstant-Q design for a real graphic representation by minimising adjacent band interactionDLT-technology for ultra accurate and artefact-less frequency, phase and amplitude response3 full parametric equliser featuring unprecedented fine frequency tuning "vernier control" offering notch filtering up to -45 dBfrequency adjustable high-pass and low-pass filtersthe perfect choice for monitor mix and poor acoustic venuesGeneral features30-band constant-Q graphic equaliser using DLT-technology for amplitude and phase response45 mm precision fadersswitch-able boost /cut scale +/- 6dB or +/- 12dBin/out switches for instant comparison with flat response on each equaliser and filter sectionlevel adjustment from -infinity to +6 dBoverload indicator driven by a peak-peak sensing circuit giving overload indication at all critical points of the equaliser circuitelectronically balanced input and output on XLRpower failure bypass relayearth-lift switchrobust mechanical construction