The Mercury EQ-H1 MK IV is a mono studio program equalizer, modeled after the revered Pultec EQH circuit. This passive EQ with a single-ended gain makeup amplifier topology provides a musical richness unmatched by active and parametric EQs. With modern enhancements like a powerful power supply and DC heater operation, the EQ-H1 is a versatile and indispensable tool for any professional studio.
Vintage Design, Modern Enhancements
Inspired by the original Pultec EQs, the Mercury EQ-H1 MK IV brings the same warmth and musicality to modern recordings. Key updates include a robust power supply and additional frequencies, making it more flexible without compromising its classic character. The transformer-balanced XLR inputs and outputs ensure pristine signal quality.
Unique EQ Circuitry
The EQ-H1’s 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 even 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.
- Modern Additions: Enhanced power supply and DC heater operation for stability and performance.
Testimonials and Industry Recognition
Top engineers and producers like Joe Chiccarelli and Fab DuPont praise the Mercury EQ-H1 for its ability to deliver classic tones with modern reliability. Pete Weiss from TapeOp Magazine lauds its silky top-end and robust lows, making it ideal for vocals, guitars, and bass.
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 12BH7
- Rack Size: 2U
- Weight: 17 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-H1 MK IV combines the timeless sound of the Pultec EQH with modern enhancements, providing unparalleled musicality and precision. Whether you're mixing, tracking, or mastering, the EQ-H1 is a powerful tool that will elevate the quality of your recordings.
