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Radial Engineering PZ-DI Active DI – Direct Injection Box PZDI


PZ-DI Active DI – Direct Injection Box

Available on back-order

SKU: PZDI Categories: , , Tags: , , , , , , , , ,


Variable Load Active DI with Piezo Optimized Input

The PZ-DI is a high-performance specialized active direct box designed to accommodate acoustic and orchestral instruments, with a selectable input impedance that can accommodate magnetic pickups or piezo transducers, and a variable low-cut filter.

Piezo problem solver

The PZ-DI has a variable load selector switch that allows you to set the input impedance of the direct box, so you can optimize the performance with your instrument’s pickups. The 1 meg ohm position delivers the classic impedance found on most active DI boxes, while the 220k ohm setting warms up the tone of magnetic pickups to provide the feel and tone as if your instrument were connected directly to an amplifier. The third setting is an ultra-high 10 meg ohm impedance that is specifically designed for piezo transducers, helping compensate for the harsh or squawky tone that can occur when a piezo is connected to a lower impedance input.

Variable filter to suit any instrument

To remove unwanted resonance on stage and prevent feedback, the PZ-DI is equipped with a fully-variable low-cut filter that gently rolls off low frequencies. The roll-off point of this filter can be raised or lowered to match the frequency response of your instrument, with a lower point for acoustic bass and a higher setting for violin or banjo. A switchable high-cut filter is also included, which is useful on instruments such as acoustic guitars that incorporate a battery-powered preamp, softening any harshness or high frequency edge for a smoother tone.



• Optimized for orchestral instruments on a live stage
• Adjustable load for piezo and magnetic pickups
• Variable low-cut filter to control low frequency resonance
• Powered by 48V phantom, no batteries required



• Audio circuit type: Proprietary analog circuit with low-noise FET op-amp
• Frequency response: 20Hz ~ 20kHz
• Dynamic range: 105dB
• Gain: +4.6dB
• Total harmonic distortion: 0.02%
• Input Impedance: 10M/1M/220K-Ohms
• Output Impedance: 200 Ohms – nominal
• Equivalent Input Noise: -98dBu

• Input pad
• Input Connectors: 1/4″ hi-Z input
• Output Connectors: XLR male output

• Construction: 48V phantom – proprietary digital switching
• Weight: 1.2lb (0.54kg)
• Shipping size (L x W x D): 127 x 84 x 48mm (5.0″ x 3.3″ x 2″)
• Power: 48V phantom – proprietary digital switching
• Conditions: For use in dry locations only between 5°C and 40°C
• Warranty: Radial 3-year, transferable





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Weight .771 kg
Dimensions 15.9 × 10.8 × 7.6 cm