Martin 332GP Acoustic Guitar Pickup
The complete system includes a specially designed miniature onboard preamp "active jack" developed by Fishman Transducers®. This unit works extremely well with the Martin Thinline 332® so we offer it packaged together as the Martin Thinline 332 Plus with Active Jack. Due to the advanced technology extremely low current consumption is drawn from the 9 volt battery; replacement is needed only once every two or three years.
