Radial Engineering PZ-Pre Bedienungsanleitung

Radial Engineering Ltd.

1588 Kebet Way, Port Coquitlam BC V3C 5M5

Tel: 604-942-1001 Fax: 604-942-1010

email: [email protected]

www.tonebone.com

PZ-Pre™

Acoustic Instrument Preamp

User Guide

www.radialeng.com

Congratulations on your purchase of the Radial PZ-Pre, without

a doubt the most challenging pedal we have ever produced! Why?

Simply put, it is so jammed with features that it took us over two

years to get it right! And with all of these features, we absolutely

recommend that you take a few minutes to read through this

manual to familiarize yourself with all of the PZ-Pre functions

before you get started.

Like all Radial products, the PZ-Pre is built to the very highest

standards with the very best components and provides the type

of durability you would expect for concert stage use. If after read-

ing this manual you have a question, please visit the FAQ in the

PZ-Pre section of our web site. This is where we post the latest

notes. If you have a question that is not covered, please send

your email to [email protected] and we will do our very best

to get back to you promptly.

Now get ready to pluck, pick, bow, twang and strum till dawn!

Radial PZ-Pre™

Acoustic Instrument Preamp

User Guide

Table of Contents Page

Introduction...................................................................1

Feature Set...................................................................2

Input Section ................................................................4

Filter and EQ Section ...................................................6

Output Section..............................................................8

Instrument Connection .................................................9

Output Connection .......................................................11

Setting Up The PZ-Pre .................................................12

Controlling Feedback ...................................................14

Adding Effects To Your Sound ......................................16

Specications ...............................................................17

Warranty ................................................................Back Cover

True to the Music

Radial Engineering Ltd. PZ-Pre™User Guide

INTRODUCTION

The Radial PZ-Pre is a very unique pedal. Although the PZ-Pre

is likely to be the best sounding acoustic guitar preamp you have

ever experienced, it is not dedicated to just guitars. We designed

the PZ-Pre from the ground up to work with all types of instruments

including violin, cello, contrabass, mandolin, Dobro, bouzouki, harp,

sitar and banjo! This is because the two inputs have been designed

to accept all types of pickups and the on-board equalizer is both

very powerful and musical. You can even combine the two inputs

should you wish to use two pickups at the same time!

Our quest for exibility did not stop there; we also equipped the

PZ-Pre with four outputs so that it could drive four separate signal

paths at the same time! And each output is managed differently to

address different needs.

The instrument amplier output is designed for the on-stage musi-

cian. An electric ddle player may have numerous effects pedals

and an over-driven guitar amp on stage to create various sonic

textures while a bouzouki player may have his vintage Fender®

Twin™. Their is an output for your electronic tuner and the mute

footswitch lets you tune in silent or change instruments.

There are also two built-in Radial direct boxes with balanced XLR

outputs to connect you to the PA or recording system. Output-1 is

a pre-EQ, pre-effects output designed to send a clean signal to the

PA system while output-2 is post-EQ and post effects to feed stage

monitors and in-ear systems with a completely different mix. For

instance, when playing in a typical arena, there is so much echo

that the last thing you would want would be to send a ‘wet instru-

ment’ (sound with lots of echo and reverb) into the PA system. On

the other hand, adding reverb to your in-ear monitor system will

often give you a better sense of space and a more natural feel to

the performance.

The built-in exibility is further expanded with an effects loop,

power booster and probably the best sounding preamp you have

ever encountered for your instrument. Best of all, it is all housed

in a super compact pedal that can t in any gig bag and travel with

you wherever you go.

True to the Music

Radial Engineering Ltd. PZ-Pre™User Guide

1. INPUT-1: ¼" connection for rst instrument.

2. PZB-1: Recessed switch activates piezo buffer for input-1.

3. TOGGLE: Footswitch selects between input-1 and input-2.

4. BLEND-MIX: Recessed switch selects between toggle mode

and mix/blend mode.

5. INPUT-2: ¼" connection for second instrument.

6. LEVEL-1: Gain control for input-1.

7. LEVEL-2: Gain control for input 2.

8. NOTCH: Used to sweep the frequency of the notch lter.

9. HIGH: High frequency shelving EQ, boosts or cuts treble.

10. MID: Amplitude control for semi-parametric mid EQ.

11. FREQ: Frequency control for semi-parametric mid EQ.

12. LOW: Low frequency shelving EQ, boosts or cuts bass.

13. BOOST: Variable level control for the power booster.

14. MUTE: Footswitch mutes all outputs except tuner out.

15. LOOP ON: Forces the effects loop to remain on.

16. OUTPUT: ¼” out for instrument amplier.

17. PHASE: Inverts the signal polarity at the ¼" instrument output.

18. FOOTSWITCH ASSIGN: Sets function of boost footswitch

between power boost, effects loop or both.

19. BOOST: Footswitch activates power booster and/or effects

loop depending on setting of footswitch assign switch.

20. NOTCH Q: Sets the depth of the notch lter. Select between

normal, deep and bypass.

21. LO-CUT: High-pass lter removes low frequencies to eliminate

resonant feedback. Select between bypass and two low-cut settings.

FEATURES AND FUNCTIONS - TOP PANEL

2019

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True to the Music

Radial Engineering Ltd. PZ-Pre™User Guide

22. PZB-2: Recessed switch activates piezo buffer for input-2.

23. LOOP SEND & RETURN: The built-in effects loop uses ¼”

jacks to connect effect pedals.

24. PRE-EQ: balanced XLR direct box out captures the dry signal

before the  lter, EQ, effects loop and boost sections. Outputs

an un-processed signal for the house PA or recording console.

25. LIFT: recessed ground lift switch disconnects pin-1 on both

XLR outputs to reduce hum and buzz caused by ground loops.

26. 180°: recessed switch reverses the polarity at the post-EQ

XLR output.

27. POST-EQ: balanced XLR direct box output sends a wet signal

for the monitor system so the player can control their on-stage

tone with the PZ-Pre.

28. TUNER: buffered ¼” output to feed an electronic tuner.

29. 15VDC-400mA: power supply connection 15 volts DC, center

pin positive.

25 26 27 28 29

22 23 24

FEATURES AND FUNCTIONS - REAR PANEL

True to the Music

Radial Engineering Ltd. PZ-Pre™User Guide

Input-1 PZB 1 Blend-

Mix

Input-2 PZB 2

Input-1 and 2

The PZ-Pre features two ¼” inputs located on the right side panel.

The  exible dual input design lets a player connect and switch

between instruments simply by stomping on the TOGGLE footswitch.

Most performers, whether they play acoustic guitar or mandolin, tend

to have two instruments on stage. The second instrument is often

for backup should a string break; in some cases, it may be tuned

differently, or it may even be a completely different instrument! The

PZ-Pre is equipped to be a control center for two instruments.

Input-1

Input-2

Level-1

Level-2

Mute

Toggle

Footswitch

Tuner

Out

LEVEL-1 and 2

Both inputs are equipped with LEVEL

controls that let you adjust the volume

of each instrument. These controls

are used to compensate for the

differences in output level some

pickups produce. Once adjusted,

you can seamlessly switch between

instruments.

PZB-1 and 2 Piezo Pickup Buffers

Each PZ-Pre input features a special piezoelectric pickup (piezo)

buffer called the PZB that can be switched into the signal path

when needed. The PZB allows a passive piezo pickup to be

connected directly to the PZ-Pre without the use of a separate

preamp. The PZB increases the gain while elevating the input

impedance to 10meg Ohms. This ensures that the piezo pickup

'sees' the optimum input impedance for signal transfer which will

result in better tone. To

activate the PZB, use

a small screwdriver to

push in the recessed

switch. There is a

separate PZB switch

for each input channel.

INPUT SECTION

True to the Music

Radial Engineering Ltd. PZ-Pre™User Guide

Saddle

Pickup

Piezo

Pickup

TRS Jack &

Plug

Tip

Saddle Pickup

To CH-1

Ring

Piezo Pickup

To CH-2

Tuner Output

This buffered ¼” output is dedicated

for an electronic tuner. Since it is

buffered, connecting a tuner won’t load

down your pickup's tone. The TUNER

output is always on and can be used in

conjunction with the MUTE footswitch

to allow silent tuning.

Mute Footswitch with LED

Depressing this footswitch will mute all

outputs except the TUNER out. The

LED illuminates to indicate the PZ-Pre

is in mute mode. The MUTE footswitch

allows silent tuning on stage through the

TUNER output. The function may also

be used to mute your rig for instrument

change-over.

Blend-Mix

The BLEND-MIX function is typically used with instruments that

have two pickup elements or two different pickup systems. It

allows you to blend the two input channels using the LEVEL

controls to set up a mix. For instance, you can use the MIX mode

to blend an active on-board pickup with a passive piezo to create

a more natural acoustic sound. Alternatively, you can use the MIX

mode to connect two guitars to one amp for jamming with another

player. The MIX mode is activated by depressing the recessed

BLEND-MIX switch using a small screwdriver. The TOGGLE

footswitch will not work when the MIX mode is active.

Input-1 is specially equipped to allow a ¼” stereo TRS cable (Tip,

Ring, and Sleeve) to access both PZ-Pre channels. This feature

is designed for instruments that combine two pickup systems

through a stereo TRS jack. A stereo TRS cable will allow you

to connect both pickups to separate PZ-Pre inputs with a single

cable. From there you can toggle between the two pickup systems

or blend them together.

True to the Music

Radial Engineering Ltd. PZ-Pre™User Guide

Pre-EQ DI Output

This balanced XLR output is essentially

an active direct box. It produces a

600 Ohm, mic-level signal suitable

for multi-channel concert snake and

mixing console. It captures the dry

signal before the  lters and equalizer

section and is not affected by the

PHASE, BOOST and LOOP functions.

It is intended to feed a PA or recording

system with a clean, unprocessed

signal.

Ground Lift for Balanced XLR Outputs

The balanced XLR outputs are equipped with a recessed set-

and-forget ground LIFT switch on the rear panel to reduce hum

and buzz caused by ground loops. If you hear any noise, push in

the switch to help eliminate the problem.

Low-Cut Filter

The three position low-cut filter (also

known as a hi-pass filter) is designed

to eliminate low frequency resonant

feedback. Selecting either the 80Hz or

200Hz positions will roll-off low frequencies

preventing uncontrolled, run-away

resonant feedback. The LO-CUT filter

can be removed from the signal path by

setting it to BYPASS.

Notch Filter

To help control feedback, a sweepable notch

 lter allows you to focus on a very narrow

frequency and surgically remove it without

affecting the over-all tone of the instrument.

The notch filter on the PZ-Pre has two

controls: NOTCH sweeps the frequency

spectrum of the  lter from 56Hz to 220Hz

while the NOTCH Q switch controls the width

and attenuation of the  lter. The NORMAL

setting introduces a -8dB notch and the

DEEP setting introduces a -15dB notch. The

notch  lter can be removed from the signal

path by setting it to BYPASS.

PRE-EQ OUT, FILTER and EQ SECTIONS

Mixing Console

Low-Cut

Filter

Notch

Filter

3-Band

Power

Boost

Effect

Loop

Dry

Pre-EQ

Out

Input

Wet

Post-EQ

Out

Send Recv

True to the Music

Radial Engineering Ltd. PZ-Pre™User Guide

3-Band Semi-Parametric EQ

This three-band semi-parametric EQ is shared between the two

inputs. HIGH and LOW are shelving type EQ and adjust the

treble and bass response. The sweepable midrange EQ uses two

controls: MID controls the amount of boost or cut, while FREQ

sweeps the frequency spectrum.

Phase Reverse (¼” Stage Amp Output)

Technically speaking, this is actually

a polarity reverse switch that lets you

toggle the polarity of the signal at the

¼” instrument OUTPUT. This switch is

used to help reduce feedback when the

monitors or PA system coincide with the

instrument amp to cause a feedback

hot-spot where the performer is situated

on stage.

Boost and Effects Loop

The PZ-Pre is equipped with a power

booster and effects loop that can be

kicked in to create dynamic solos or

avant-garde textures. The power boost

and effects loop may be activated together

or separately, depending on the position

of the FOOTSWITCH ASSIGN switch.

Boost

When the FOOTSWITCH ASSIGN is

set to BOOST, depressing the BOOST

footswitch will only turn on and off the

variable power booster (effects loop is

bypassed). The BOOST knob sets the

level of the power booster with a maximum

of +12dB of clean boost. When set to

BOTH, depressing the footswitch will turn

both the effects loop and power booster on

or off. An LED illuminates when the loop,

booster, or both, are active.

Effects Loop

The ¼” effects loop SEND and RETURN

jacks are used to interface with standard

guitar effects pedals such as reverb, chorus

and delay. When the FOOTSWITCH

ASSIGN is set to LOOP, depressing the

BOOST footswitch will only turn on and

off the effects loop (power booster is

bypassed). The effect loop can be set to

stay on all the time by using the LOOP

ON switch next to the stage amp output.

Effects Loop

True to the Music

Radial Engineering Ltd. PZ-Pre™User Guide

180° Polarity Reverse

The POST-EQ XLR balanced output features a polarity reverse

for absolute phase alignment. This recessed switch will invert the

signal polarity of the POST-EQ XLR output by reversing pins-2

and 3 at the XLR connector. The default position for the switch is

pushed out where pin-2 is positive. This is the AES standard for

XLR connectors and is sometimes called 'pin-2 hot'.

OUTPUT SECTION

Post-EQ DI Output

This balanced XLR output is another active direct box. It produces

a 600 Ohm, mic-level signal suitable for connecting to mixing

consoles. The POST-EQ XLR OUT comes at the end of the PZ-

Pre signal path after the  lters, equalizer, PHASE, BOOST and

LOOP functions. It is intended to feed a stage monitoring system

or in-ear monitors allowing the player to control their on-stage

tone through the PZ-Pre controls.

XLR OUTS

Polarity Reverse

XLR OUTS

Ground Lift

Dry

Pre-EQ

Wet

Post-EQ

Low-Cut

Filter

Notch

Filter

3-Band

Power

Boost

Effect

Loop

Dry

Pre-EQ

Out

Input

Wet

Post-EQ

Out

Send Recv

¼" Instrument Amp Output

The ¼” OUTPUT jack connects to the musician’s on-stage

ampli er. This output is at the end of the PZ-Pre signal path and

is affected by all the controls.

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