Radial Engineering PZ-DI User's Guide
™
PZ-DI
Piezo Optimized
Active Direct Box
USER GUIDE
Radial Engineering Ltd.
1588 Kebet Way, Port Coquitlam BC V3C 5M5
Tel: 604-942-1001 • Fax: 604-942-1010 • Email: info@radialeng.com
www.radialeng.com
™
PZ-DI
Piezo Optimized
Active Direct Box
TABLE OF CONTENTS PAGE
Introduction ..............................................................................1
Input & output panel features ..................................................2
Overview & load adjustment ....................................................3
Powering the PZ-DI .................................................................4
Connecting the JPC.................................................................5
Using an amplier ....................................................................6
Using the PAD and low-cut lter ..............................................7
Using the polarity and ground lift .............................................8
Block diagram and specications ............................................9
Warranty ....................................................................Back cover
INTRODUCTION
Thank you for purchasing a Radial PZ-DI, one of the most innovative direct boxes ever made! Unlike others that are a
‘one-size-ts-all’ the PZ-DI has been designed from the ground up to solve the problems that are common to piezo-electric
transducers while signicantly enhancing the musical performance when used with other pickups or instruments.
This manual has been written to provide you with a full understanding of how to use the PZ-DI and get the most out of
it. Please take a few minutes to read it all the way through. You will nd that there are several innovative features built-in
that can greatly enhance your enjoyment and the outcome. If by chance you do not nd everything you need within these
pages, please visit the PZ-DI FAQ page on our web site. This is where we post the latest updates and questions from
users like you. If after that you still do not nd what you are looking for, feel free to send an email to info@radialeng.com
and we will do our very best to reply to you in short order.
Now get ready to hear that orchestra like never before!
Radial Engineering Ltd. PZ-DI™ User Guide
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INPUT PANEL
1. INPUT: ¼” hi-Z input used to connect the instrument to the PZ-DI.
2. THRU: ¼” throughput used to feed an on-stage instrument amplier.
3. LOAD: 3-position switch lets you adjust the input impedance to
optimize the load for the type of pickup being used. Set to 220k
ohm for magnetic pickups, 10 meg-ohm for piezo transducers and
1 meg-ohm to replicate traditional DIs.
4. PAD: Reduces the input sensitivity by -15dB enabling the PZ-DI
to be used with high output instruments such as active basses or
keyboards.
5. LO-CUT: Variable high-pass lter is used to remove unwanted
resonance and size the instrument to suit. Variable from 5Hz to
500Hz.
6. HI-CUT: Used to warm up the sound of active instruments that often
contain excessive high frequencies.
7. BOOK-END DESIGN: Creates protective zone around connectors, switches and potentiometers to prevent damage.
Radial Engineering Ltd. PZ-DI™ User Guide
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OUTPUT PANEL
8. NO SLIP PAD: Provides electrical and mechanical isolation while
keeping the PZ-DI from sliding around on busy stages.
9. XLR OUT: Balanced low impedance output used to connect the
PZ-DI to the mixing console. Allows long cable runs in excess of
100 meters (300 feet) without noise.
10. PHASE: 180° polarity reverse toggles pin-2 and pin-3 at the XLR
output. Used to tame acoustic hot spots on stage and help reduce
resonant feedback.
11. LIFT: Ground lift switch disconnects the ground from the audio
signal path and helps eliminate hum and buzz caused by ground
loops.
12. 48V: Provides visual status of 48V phantom power. When the LED
is on, the PZ-DI is being fed 48 volts from the console.
13. THRU BUFFER ON: Buffers the signal before it is sent to the thruput connector for use with piezo transducers or when using longer
cable runs.
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