SPL PasseQ Passive Mastering Equalizer

The SPL Passeq is a neo-classic design with separate passive hi, mid and low boost & cut filters with 120V rail gain make-up stages and Lundahl I/O transformers. The musical character and rich sound of passive filters built with selected components fulfill the highest sound expectations in recording, mixing and mastering.

Key Features:

• 144 passive filters (72 per channel) in one EQ
• Individual coils per filter
• Single core coils, which means that every one is wound individually on its own dedicated core. This excludes sonic degradation from mutual influences while at the same time improving THD values
• 120V makeup amplifiers based upon SPL unique SUPRA-OPs with 150dB dynamic rage & 200 v/ms slew rate
• Individual design & component specificity for each filter
• Custom made coils for critical mid-frequency ranges
• Boost & cut crossovers mesh perfectly so that with the high number of frequencies one can dependably command the most elaborate set of response curves that to date any passive EQ has offered
• Transformers from Lundahl with perfectly matched sonic characteristics provide for balanced I/O stages
• XLR contacts from Switchcraft
• Switches and potentiometers from Elma & ALPS (including ALPS “Big Blue” with 41 step
• Internal, linear power supply featuring a generously proportioned toroidal transformer & voltage selection (110-120V, 60Hz or 220-240V, 50Hz)