TPB2 Dual Tube Preamp w/Optical Compression & Digital Output for D16XD/D32XD In this era of digital audio, more and more musicians, engineers and producers are longing for the warm, full-bodied sound produced by vacuum tubes. Say hello to the all-new TPB-2. In one rugged and compact unit, the TPB-2 combines a dual channel tube preamp and optical compression – a total solution for your demanding audio applications. Two for one! The TPB-2 offers two completely independent preamps, with individual realtime controls. Each channel is driven by its own 12AX7 tube. A "Stereo" switch on the front panel allows both preamps to work in tandem when processing a stereo source. Full-featured mic preamps Using a specially tuned version of the Valve Force technology so widely acclaimed in the Electribe X series and the TRITON Extreme, the new TPB-2 tube-driven preamp imparts a robust warmth and a rich musical character that is ideal for your critical and challenging acoustic sources. Each preamp channel accepts either XLR or 1/4" TRS inputs, and switchable phantom power is provided. Equipped with a Hi-Z switch, 26dB pad button and a variable trim knob, the TPB-2 assures the optimal gain setting for any source, from a premium microphone to a direct bass or guitar signal. Transparent optical compression By using state-of-the-art optical compression, the TPB-2 is able to respond quickly, breathing life and luster into your sound. In addition to enhanced response times, optical compression provides a wide range of dynamic control – without coloring the source material in adverse ways. Compression sensitivity knobs on the front panel are teamed with Fast/Slow release time buttons and audiophile analog VU meters for intuitive realtime control. XD series plug-in The TPB-2 mounts directly into the option bay on the D16XD or D32XD front panel. Easy installation The TPB-2 is user installable, allowing you to experience the benefits of warm tube preamps and clear optical compression right away.