The EQP1S5 is a passive, solid-state EQ for the 500-series/51x Alliance based on a Pultec design. The EQP1S5 uses the frequency selections from Pultec’s special “S” series and replicates the discrete opamp output stage of the solid-state Pultecs. In order to hew as closely to the original design as possible, the it uses custom-wound molypermalloy, toroidal inductors as well as custom reproductions of the original HS56 transformer.

Features:

• Custom inductors and transformers
• Wima polypropylene capacitors
• Grayhill switches
• Wima polypropaline capacitors
• Conductive plastic potentiometers
• Compatible with any 2520-type discrete opamp
• Includes an adapter board to use an inexpensive monolithic opamp in place of the DOA

Price: $450 for full kit

More Info:

• For ordering
• The GroupDIY thread