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OPA1604: Alternative device to OPA1604

Part Number: OPA1604
Other Parts Discussed in Thread: OPA1664, OPA1679

Hi Team,

Our customer is developing an audio project using guitar style inductive pickups. They need help selecting the correct op-amp for their active filters. Currently, they are using OPA1604 but it seems the specification is quite high for their application. They are looking for an affordable op-amp that will have great audio characteristics. Everything in the active filter is in the unity gain set up. They use approximately 74 quad op-amps per product so they also need it to be affordable.

Can you please suggest an alternative opamp with lower cost that would meet their requirements? Below is the schematic diagram of their circuit for reference.

Joseph Howe Sch.pdf