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If you have any questions or problems, contact our PRODUCT INFORMATION LINE at 978-988-9665. The Fishman AGP-2 and ABGP preamps are specifically designed for use with piezoelectric pickups. Since piezoelectric pickups require specific electrical environments, the AGP-2 / ABGP feature discrete input stages that maximize the full potential of the pickup. Both units provide active gain control and fully buffered shelving style active boost and cut for BASS and TREBLE. The center frequencies of thes