The Mercury EQ-P1 MK IV is a mono studio program equalizer inspired by the legendary Pultec EQP1a circuit. Designed to address the limitations of recorded music, the EQ-P1 combines passive EQ with a fully balanced (push-pull) gain makeup amplifier, providing unmatched warmth and musicality. This modern take on a classic circuit is an essential tool for any professional studio.
Vintage Design, Modern Enhancements
The EQ-P1 retains the authentic sound of the original Pultec EQP1a while incorporating modern enhancements such as a more powerful power supply and DC heater operation. The addition of the Mercury I.S.T. Switch allows engineers to switch the interstage transformer in or out of the circuit, providing two distinct tonal options without changing settings.
Unique EQ Circuitry
The passive boosting and attenuating shelving EQs avoid the phase and dynamic distortions typical of active EQs. The interaction of transformers, tubes, and passive components results in an incredibly musical sound, perfect for tracking, mixing, and mastering.
Features and Controls
- Low Frequency Control: Selectable frequencies at 20, 30, 60, 100, and 200 Hz with 0dB to +13dB boost and 0dB to -17dB attenuation.
- High Frequency Control: Selectable frequencies at 3, 4, 5, 8, 10, 12, and 16 kHz with 0dB to +16dB boost and 0dB to -16dB attenuation.
- Mercury I.S.T. Switch: Allows switching the interstage transformer in or out of the circuit for different tonal characteristics.
Testimonials and Industry Recognition
Top engineers like Joe Chiccarelli and Matt Knobel praise the Mercury EQ-P1 for its ability to deliver classic tones with modern reliability. Pete Weiss from TapeOp Magazine highlights its performance in mixing scenarios, noting its effectiveness on vocals, guitars, and drums.
Mercury EQ-H1 vs. EQ-P1
The EQ-H1 is known for its punchy, robust sound with a slight push in the low end, making it perfect for thickening vocals, bass, and drums. In contrast, the EQ-P1 is more open and silky, adding warmth across all frequencies, especially suited for acoustic instruments and two-bus applications.
Specifications
- Tubes: 1x 12AX7 and 1x 12AU7
- Rack Size: 2U
- Weight: 19 lbs
- Low Frequency Select: 20, 30, 60, 100, 200 Hz
- High Frequency Select: 3, 4, 5, 8, 10, 12, 16 kHz
- Shipping Size: 24" x 16" x 8"
Conclusion
The Mercury EQ-P1 MK IV is a testament to the timeless quality of the Pultec EQP1a, enhanced with modern features for today's recording needs. This studio program equalizer offers unparalleled musicality and precision, making it an invaluable tool for any audio professional. Elevate your recordings with the Mercury EQ-P1 MK IV.
