The PCBE12OPN is Grand Concert body style acoustic/electric bass with Spruce top, Okoume back and sides for a warm, full tone. While the Open Pore Natural finish enhances the instrumentÄôs natural beauty, it also contributes to the sound quality. Thick, heavy finishes can impede the vibration of a guitarÄôs body, ÄúchokingÄù the instruments tone and projection. The lightly applied natural Open Pore finish optimizes sound vibration and allows the bass to realize itÄôs full sound potential. The Ibanez AEQ -2T preamp is specifically set to tailor the frequencies of a bass and allows operation of the built-in tuner without the instrument being plugged in. The PCBE12OPN also features a tortouse rosette, chrome die-cast tuners, Laurel fretboard and bridge, with Ibanez Advantage bridge pins for improved tuning stability. Features 4 String Acoustic Bass Guitar - Recommended to fit case IABB540-BK Spruce Top with Okoume Back and Sides in a Open Pore Finish PCBE Neck Type. Maple neck with Open Pore finish - Dovetail 15th fret joint Ibanez Under Saddle Pickup with Tuner on/off switch Specifications Brand Series: PERFORMANCE SERIES Origin: INDONESIA Strings: 4 Strings: Colour Filter: Open Pore Natural Finish: Open Pore Finish Inlay: White dot inlay Body, Back, & Sides: Okoume Back and Sides Acoustic Preamp: Ibanez AEQ-2T preamp with onboard tuner Pickups: Ibanez Under Saddle Pickup Controls: Tuner on/off switch Scale: 32 inch Scale: Fretboard: Laurel fretboard with 20 frets Top: Spruce Top Acoustic Soundhole, Binding And Bracing: Tortoiseshell Soundhole Rosette String Gauges (Top To Bottom): .040/.060/.075/.095 Tuning (Top To Bottom): 1G,2D,3A,4E Case Inclusion / Recommendation: Recommended to fit case IABB540-BK Other Items Included: Hex wrench, Saddle, Bridge pin