The complete performance technology solution for acoustic musicians. The Aura Spectrum DI features award-winning Aura Acoustic Imaging technology that allows musicians to blend the sound of a studio mic with the signal from their saddle or soundhole mic. Housed in a professional-grade all-metal enclosure, the Aura Spectrum DI features 3-band EQ, one-knob compressor, automatic feedback cancellation with up to 3 notches, chromatic tuner , an effects loop and a high quality balanced XLR DI. The included Aura Image Gallery software provides access to an ever-growing list of instrument images recorded using our collection of the most sought-after microphones. Not only is Aura Spectrum DI incredibly versatile, it also delivers the most realistic acoustic sound available for the stage or studio. Fishman's Aura Image Gallery software allows users to access images of hundreds of guitar makes and models through our free Aura Image library. Once installed on your PC or Mac, the software also allows you to sort, manage and group Aura images. Users can then take advantage of the preamp's open architecture by loading Aura images via USB cable. FEATURES & INFO Award-winning Aura Acoustic Imaging technology 128 preloaded images for use with the most popular acoustic instruments Instrument preamp with balanced XLR DI. Volume, mix and picture select controls 3-band EQ One-knob compressor Automatic feedback control with up to 3 notches Built-in chromatic tuner with bypass/mute 16 user-configurable picture slots USB interface for download images from Aura image gallery (software included) Automatic DI anti-feedback phase switch. Ground Lift SPECS PROCESSOR: 32-bit processing MATERIAL: Durable all-metal construction DIMENSIONS: 5.6" L x 5.25" W x 2.1" H (142 mm) (133 mm) (53 mm) WEIGHT: 1.7 lbs (0.77 kg) POWER: 9-volt battery (not included) or optional 910R power adapter (ACC-BLE-POW) BATTERY LIFE: 20 hours AUDIO I/O specifications Mono input and output 1/ 4" with balanced XLR DI input adjustment control. 1/4" effects loop 24-bit A/D/A conversion 910R power supply available separately