This unit is in the box and in perfect condition (“Like New”) and costs $520 if bought new (plus shipping and tax). Offered here at $400 (no tax). The Aura Spectrum is a complete performance technology solution for acoustic musicians. It features award-winning Aura Acoustic Imaging technology that enables players to mix studio-mic’d sound with the signal from their undersaddle or soundhole pickup. It’s the first to use Impulse Response (IR) technology with acoustic instruments, Aura Image processors provide the most realistic acoustic sound available for plugging in on stage or in the studio. Aura Spectrum DI combines Aura with a high-quality preamp featuring 3-band EQ, Compressor, Automatic Feedback Suppression, Chromatic Tuner, Effects Loop, and XLR DI.