I used the EQ-P1 and EQ-H1 extensively in mixing scenarios, and they performed like champs. I was able to dial in silky top-end on vocals and acoustic guitars and beefy lows on kick drums and mic'd bass cabinets with truly 'pro' results. There were many times when i hit upon a certain setting and found it was 'that sound' I had heard for years on 'that famous record' that didn't seem possible to get with 'other gear'. These EQs are so perfectly geared to music that - even with extreme settings - it's hard to get bad results with them.Pete Weiss, TapeOp Magazine
The Mercury EQ-H1, EQ-P1, EQ-H2 and EQ-P2 are all based on the original Pultec equalizers which were tools developed to deal with the limitations of recorded music. Limitations that most often manifest themselves in the highest and lowest frequencies of the program material. The Mercury Studio Program Equalizers, like the family of original Pultec EQs, are originally designed to bring back the life and musicality lost in a recording. Whether by accident or genius, nothing has been able to do this better in music production than a passive equalizer with tube gain make up amplifier (‘Pultec style’) equalizer. The interaction of the passive boosting and attenuating shelving EQs (not relying on negative feedback), as well as the transformers, tubes and other amplification circuitry all add to the incredibly musical character of the product. Working engineers try other types of equalizers, but always end up coming back to the Pultec style as the equalizer of choice for those final touches while tracking or mixing and even mastering at times.