C.F. Martin Co. Thinline Active Jack Pre-amp, 24AAAJ, Authorized Dealer, Full factory warranty.
The 332 Plus is a pickup system for acoustic guitars developed by Fishman Transducers. The complete system includes a ceramic under-the-saddle pickup (Thinline 332) and state-of-the-art circuitry that is housed in the shielding cap the jack.