Radial PZ DI
Type: DI box, Buffer
Features: Adjustable load for piezo and magnetic pickups, variable low-cut filter to control bass resonance, 48V phantom powered (does not require batteries), 180° polarity reverse switch, Ground lift
The Radial PZ-DI is a direct box that is specifically designed for acoustic and orchestral instruments. Unlike most direct boxes that are limited to a ‘one size fits all’ design, the PZ-DI lets you properly match the input impedance to the source to optimize the frequency response and dynamics.
www.radialeng.com/r2011/pzdi.php
StageBug™ SB-4 Piezo DI
Type: DI Box, Buffer
Features: 10 megOhm Impedance input, High Pass filter, Phase reverse, Phantom powered