The Mercury EQ-P2 is two independent (dual mono) channels of our popular Mercury EQ-P1 (mono) Studio Program Equalizer in a 3U package. The Mercury EQ-P2 is based on the vintage Pultec EQ-P1a circuit. The Mercury EQ-P2 has a passive EQ circuit with a fully balanced (push-pull) gain make up amplifier. This new Mercury production utilizes only the highest quality passive components, while remaining true to the original and like all Mercury products has transformer balanced input and outputs. Besides a much more powerful and stable power supply and running DC on the heaters, rather than AC, the only other modernization is one of Mercury EQ-P2's most popular features, the Mercury IST Switch.