Quilted Maple Top, Back & SidesThe AEF37E features quilted maple on the top, back and sides. This gives it a gorgeous appearance and brilliant tone with strong projection.B-Band® UST™ Pickup & Ibanez SRTn Preamp　with Notch Filter & Onboard Tune The B-Band® UST™ pickup provides incredibly well-balanced and warm acoustic sound reproduction. Getting the right sound every time, no matter what the venue, is made possible by the Ibanez SRTn Preamp. The SRTn' s innovative notch filter-equipped feedback reduction system allows high, loud sound levels on-stage without any annoying squeal creeping into the mix. Adjustments are minimal - no more annoying onstage fiddling with your controls - and tuning up is a breeze thanks to the SRTn's convenient onboard tuner.