Editorial Review This product has been played/demoed in store, used to make promotional materials, or returned in great condition. It may be missing its original packaging or inserts or show very slight signs of use. This item is backed with the same return policy and satisfaction guarantee as a new product, making it a risk free purchase. ISP Technologies Theta Pro DSP Preamp Fully programmable, with a DSP software implementation of the ISP Technologies Theta Preamp, provide the Theta Pro super high gain and zero aliasing typical in other digital preamps. The available processing power provides additional enhancement for the Decimator Time Vector Processing algorithm for silky smooth sustained note decay and super fast staccato tracking. The Theta Pro has a full pre distort tone section with adjustable bass and bass corner frequency, two full parametric swept mid bands plus treble with an adjustable corner frequency. Select Vintage or THETA preamp, add SAG if you(TM)re looking for dynamic feel, and then adjust post distort tone with another full complement of EQ including adjustable bass, bass corner frequency, two full parametric swept mid bands plus treble again with an adjustable corner frequency. The Vintage preamp lets you dial in any of the classic sounds you would like to add to your sound library. The Theta Pro DSP has stereo outputs for your stage rig, letting you drive a power amp and typical guitar cabinets, plus balanced XLR outputs with selectable TRUE SPEAKER,, digital guitar speaker cabinet and a headphone output also with TRUE SPEAKER. ISP(TM)s ground breaking TRUE SPEAKER is a departure from typical speaker simulated outputs, which provide a simple filter response. ISP(TM)s TRUE SPEAKER provides convolved speaker outputs providing the actual time domain and frequency response aspects of vintage speakers including adjustable microphone placement. With TRUE SPEAKER, the Theta Pro DSP is the ultimate direct recording guitar system