It's small and lightweight, making it convenient for live performances. Suitable for acoustic guitars and basses with piezo pickups. It also features a 3-stage low-cut filter to eliminate low-frequency noise. Purchased from a used store in September 2025. Operation confirmed. Body only (batteries in the photo are not included). FISHMAN Platinum Stage EQ/DI Analog Preamp This acoustic guitar preamp features a class A preamp (discrete circuit) with a wide headroom, achieving high fidelity and low distortion. It can also be used as a preamp for acoustic or electric bass by switching the switch. Specifications ■ Acoustic guitar preamp ■ Class A preamp, discrete circuit ■ Controls: ・3-band + Mid Frequency Control ・3-band Low Cut Filter ・Guitar/Bass mode switch ■ Dimensions: 143W x 30H x 85Dmm ■ Weight: 0.30kg ■ Power: ・9V battery (sold separately) ・DC9V adapter (sold separately) ・48V phantom power