Radial ToneBone PZ-Pre Acoustic Instrument Preamp  From Radial

Compact and easy to use, the Radial PZ-Pre packs in all of the features you need to take your acoustic instrument from home to studio and club to concert.

Radial Engineering


Retail:  $400.00

"Experience the Difference"

Try Before You Buy

Try Before You Buy
Call us now to set up a free trial in your home or studio: 888-528-9703. Our specialists will help you select the best fit for your needs and hook up your free trial for the ultimate peace of mind. Experience the Sound Pure difference!
View all eligible products »

Sound Pure's 3-Year Warranty

Our Free 3-Year Warranty!
In addition to the standard included manufacturer warranty, virtually all new products carry our exclusive, industry-leading, absolutely free, Sound Pure 3-Year Warranty, which includes PARTS & LABOR. This high-value perk is our way of providing the ultimate in added value to enhance the unique personal touch our small, dedicated team contributes to each purchase.
Learn more »

Lifetime Support

Free Lifetime Technical Support!
Our small team of dedicated experts is here to help the original purchaser for the lifetime of the product. Why? Because we care about building real relationships with our customers for life and stand behind every product we sell.

Free Shipping

This Product Ships Free!
Products ship from our well-located, climate- and humidity-controlled warehouse absolutely free (inside the continental USA). Low-cost international shipping options exist for most products.
Contact us for details »

No Sales Tax Outside North Carolina

Ships Quick!
Usually ships 3 - 5 business days after order processed.
Payments as low as $26/mo.

Want a lower price?
Get Discount

Check your email inbox now!


Our best price is too low to print,
but we'll email it to you immediately!

learn more »

How to get a lower price, instantly!

Why do we do this?

Some manufacturers have a "minimum advertised price", which restricts how low of a price we can display. By requesting an e-mail quote from us, you give us the ability to offer you a lower price than anywhere else on the web. A quote on the product will be sent instantly to the e-mail address you enter, and you can add the product to your cart at the lower price displayed in the e-mail.

Manufacturer's Description from Radial

The Radial Tonebone PZ-Pre™ is the most powerful acoustic preamplifier ever to be put inside a pedal. And when we say acoustic, we do not just mean acoustic guitar - we mean ANY acoustic instrument including banjo, violin, cello, mandolin, contrabass, bouzouki or lute. The magic lies in the combination of high performance 100% discrete class-A PZB piezo boosters, an ultra-quiet preamp circuit that will adapt to any pickup system and a host of connectivity options that will put you in total control.

The PZ-Pre is equipped with two inputs for quick instrument changes on stage. These can also be combined to blend two pickups together if you so desire. Features include a powerful yet warm sounding semi-parametric EQ to tailor your sound, feedback eliminating controls including a dual-Q notch filter to surgically remove feedback, a high-pass filter to cut low frequency resonance, and a phase reverse switch to eliminate hot spots on stage. It is also equipped with a host of outputs: a ¼" hi-Z instrument out for an on-stage amp, a pre-EQ balanced XLR output for the PA system and a post EQ XLR out for stage wedges or in-ear monitors. A dedicated tuner out with mute switch lets you quietly tune on-stage. There's even a combination power booster - effects loop to add sizzle and dynamics to the performance and extra presence when soloing!


  • Two channels to switch between instruments

  • Notch & resonance filters eliminate feedback

  • Pre & Post Radial DI outputs for PA and monitors

  • Power booster and mute for more control on stage

Radial Engineering

About Manufacturer

Radial Engineering is a manufacturer and distributor of professional audio equipment, building tools for the working audio and audio-video professional. Radial is located on the Fraser River, just outside Vancouver, British Columbia in the municipality of Port Coquitlam. The company began operations in the fall of 1991 as the Canadian distributor of Mogami cable and Jensen Audio Transformers. In 1992, it became a limited corporation under the JP Cabletek Electronics Ltd. banner. The Radial name was first used on house branded cables and snake systems. The Radial name and logo represents a cross section of quad cable; Radial being round. In 1996 the Radial JDI direct box was launched. This led the way to the Radial JDV and today, over 50 electronic products are now being produced under the Radial, Tonebone and Forest Audio brands. In 2001, the Primacoustic brand was launched to address the growing demand for acoustic products for the burgeoning home recording market and in 2006, the company officially changed its name to Radial Engineering Ltd.


Circuit Type: Proprietary active circuit
Standard input impedance: 6.8k Ohm at input jack ('PZB' switch out)
Input with PZB switch in Impedance: 10meg Ohm at input jack
Output Impendence: 1k Ohm
Low cut roll-off:

Position 1: 75Hz

Position 2: 2:220Hz

Notch Freq. range: 56Hz to 330Hz
Notch Q:

Setting 1: -8dB

Setting 2: -15dB


+/- 12dB @ 75Hz

+/- 12dB @ 82Hz to 5.6kHz 


+/- 12dB @ 7.5kHz

Boost level 12dB
Effects send & receive -10dB
FX loop impedance

Send: 1k Ohm

Receive: 15k Ohm

Polarity 180° switch (absolute phase reversal)
Connections Input-1: ¼" unbalanced
Input-2: ¼" unbalanced
Insert Send/Receive: ¼" unbalanced 
Amp output: ¼"unbalanced, Hi-Z, 1k Ohm
Tuner output: ¼"unbalanced, Hi-Z, 6.8k Ohm
Pre-EQ output: XLR balanced mic level 600 Ohms 
Post-EQ output: XLR balanced mic level 600 Ohms
Footswitches Three: Mute, Boost, Toggle 1-2 
Heavy-duty high-cycle switches
LED indicators Large 3mm OD ultra-bright LED indicators for:
mute, boost, Ch-1 & Ch-2 toggle status
14 guage steel, baked enamel finish
8"w x 4 ¼"d x 2"h (205 x 110 x 51mm)
2.7lbs (1.2kg)
Radial 3-year limited warranty
Power Supply:
15VDC 400mA, center pole positive





User Manual