Audioscape EQP-A Tube Equalizer

The AudioScape EQP-A is a handcrafted USA-made vintage tube equaliser featuring a full NOS valve complement, custom-wound transformers, a custom inductor and a faithfully recreated classic passive EQ circuit designed to deliver the iconic silky top end, powerful low-frequency response and harmonically rich analogue character associated with legendary American studio equalisation.

Legendary Tube Equalisation with Modern Precision

The AudioScape EQP-A captures the musicality and character of one of the most revered passive tube equalisers in recording history while refining key aspects of the design for improved performance and consistency. AudioScape developed the EQP-A through extensive research and circuit analysis to preserve the unmistakable analogue warmth and sonic weight that engineers associate with classic recordings.

Unlike many recreations that simplify or alter critical elements, the EQP-A maintains the complete architecture of the original design, including features often omitted from alternative versions. This approach allows the unit to retain the larger-than-life depth, openness and harmonic complexity that define the classic sound.

Faithful Circuit Design and Period-Correct Components

The EQP-A incorporates a carefully selected NOS tube complement consisting of a 12AX7, 12AU7 and 6X4 rectifier tube. The inclusion of the 6X4 rectifier remains particularly important because it contributes to the response and feel of the original design while affecting harmonic behaviour and power delivery characteristics.

AudioScape also includes custom-wound transformers that replicate the specifications of the original hardware. The input transformer, interstage transformer and output transformer work together to shape the tone and transient response while adding the subtle saturation and depth expected from classic analogue circuitry.

The inclusion of the interstage transformer provides a significant advantage because many alternative recreations exclude this component despite its important contribution to tonal balance and overall sonic character.

Custom Inductor and Premium Signal Path Components

The EQP-A uses a custom inductor wound to original specifications to preserve the smooth and musical filter behaviour associated with classic passive equalisation. Engineers rely on this design approach because it creates broad, natural shaping rather than narrow corrective filtering.

Premium components throughout the signal path further reinforce performance and reliability. Cornell Dubilier polypropylene axial capacitors maintain signal integrity, while Allen-Bradley carbon composition resistors introduce subtle vintage characteristics in critical stages.

The unit also incorporates Alpha potentiometers, Neutrik XLR connections and a robust custom power transformer to ensure long-term consistency in professional studio environments.

Classic Character with Refined Performance

AudioScape refined and corrected aspects of the original circuit design after identifying inconsistencies within historical schematics that affected performance under certain filter settings. These refinements preserve the character and musicality of the original units while improving operational accuracy.

The result delivers an exceptionally vivid and dynamic sound with extended top-end detail, substantial low-end authority and a highly musical response that suits tracking, mixing and mastering applications.

Why Choose AudioScape EQP-A

• Delivers classic analogue tube warmth with detailed and musical EQ curves
• Adds powerful low-end weight without sacrificing clarity
• Creates smooth high-frequency enhancement without harshness
• Preserves transients while introducing natural harmonic richness
• Uses authentic design elements often removed from modern recreations
• Provides handcrafted build quality with premium components throughout
• Offers vintage sonic character with improved consistency and reliability
• Supports recording, mixing and mastering applications equally well

• Handcrafted in the USA
• 3U 19-inch rackmount format in classic Pultec Blue finish
• Full NOS tube complement including 12AX7, 12AU7 and 6X4 rectifier valve
• Custom-wound input transformer based on original specifications
• Custom-wound interstage transformer for authentic signal behaviour
• Custom output transformer recreating the original Peerless design
• Custom inductor wound to original specifications
• Faithfully recreated vintage passive EQ circuit
• Refined circuit design for improved filter performance
• Cornell Dubilier polypropylene axial capacitors
• Allen-Bradley carbon composition resistors in key signal areas
• Period-correct Davies control knobs
• USA-made silk-screened front panel
• Alpha potentiometers
• Custom USA and international power transformer
• Neutrik XLR input and output connectors
• Two-year warranty included

This item, like everything we supply, comes with the complete support of our expert team. Our excellent technicians have been specifying, building and supporting studios for over twenty years. If you have any problems with installation, setup or everyday use, they’re never more than a click away, and always happy to help.

You can contact them here.