Audio Sprockets ToneDexter 2 Acoustic Guitar Preamp Pedal

Restores The Missing Body Sound to An Instrument’s Piezo Pickup

2 In Stock

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stock availability
2 at our Guildford Store
0 at our off-site Warehouse
Want to Click and Collect or try items at our Guildford Store?

The store is open 10am - 6pm Monday to Saturday and 11am - 5pm Sunday and bank holidays.

The stock information shows the quantity of units that are available to purchase at the Guildford store and the quantity of units that are available at our off-site Guildford warehouse. These stock levels are updated in real time.

Our Click and Collect service is available at our Guildford store from 10am - 6pm Monday to Saturday, and 11am - 5pm on Sunday. You can either choose click and collect as your delivery option online or, during store opening hours, call our sales team at 01483 456777 to place a 10% deposit.

If you have placed your order online, you will receive a confirmation email of your order and a separate follow-up text or email to confirm when your item is ready for collection.

Please do not come to the store before you have received the follow-up message, as your order may not yet be ready at the store.

If the only available stock is in our off-site warehouse it can be brought to the store location for you to try - you just need to contact the store within opening hours. Please note any requests received after 3.30pm will not arrive at the store until the following morning.

Please be aware that, unless you have paid a deposit to reserve the item, it will continue to be free, both online and in-store, for another customer to buy. Therefore we would advise you to place a 10% deposit by either using the on-line click and collect service or calling us 01483 456777.


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Product Description

The ToneDexter II is an innovative high-end preamp that improves the sound of an acoustic instrument pickup.

It can learn the difference between how an instrument sounds through a microphone and how it sounds through its pickup. Using the revolutionary WaveMap technology, it corrects the pickup so that it sounds like the microphone.

Key Features

  • Simple to use Colour Display – The uncluttered & colour coded display makes it easy to control your settings.
  • Built-in Tuner & Boost - There is a built in Tuner and a Boost switch for selecting extra gain for solos. You can EQ the sound and apply a notch filter to deal with any feedback issues.
  • Connectivity – The ToneDexter II plugs into many different gear types, making it an essential piece of gear in your setup, to deliver your true tonal quality.


Plug your pickup into the ToneDexter II and the output to the PA or your acoustic instrument amp, select a WaveMap sound and play. Your live pickup sound will match your studio mic.

Studio Sound Combined with the Convenience of a Piezo Pickup

ToneDexter II restores the rich body tone of your acoustic instrument to the pickup using proprietary digital signal processing technology combined with a pristine analog signal path.

Once you have stored your mic sound into ToneDexter II, simply plug in your instrument and play.


Instrument Input

  • 1/4” phone jack
  • Input impedance: 1MΩ if using a standard mono plug, 10MΩ if using a TRS plug with RING unconnected
  • Gain range: -38dB to +25dB

Aux Input

  • 1/4” TRS phone jack
  • Left or Right channel:
  • Input impedance: 1MΩ
  • Gain range: -38dB to +25dB
  • Right channel:
  • Switchable +9V bias through 10K resistor

Mic Input

  • XLR female
  • Input impedance: 2KΩ differential
  • Gain range: -11dB to +49dB
  • Switchable +48V phantom power

Main Output

  • 1/4” TRS phone jack
  • Unbalanced single ended, or impedance balanced differential drive
  • Source impedance: 300Ω per side
  • Gain range: -34dB to +14dB

DI Output

  • 1/4” TRS phone jack
  • Voltage and impedance balanced differential drive
  • Source impedance: 300Ω per side
  • Gain range: -28dB to +20dB

Aux Output

  • 1/4” TRS phone jack
  • Dual mono or stereo operation, capable of driving most headphones
  • Source impedance: 20Ω per side
  • Gain range: -22dB to +26dB

FX Sends

  • 1/4” TRS phone jack
  • Dual mono or stereo operation
  • Source impedance: 500Ω per side

FX Returns

  • 1/4” TRS phone jack
  • Dual mono or stereo operation
  • Input impedance: 1MΩ per side

USB Jack

  • USB 2.0
  • Micro B

DC Power Input

  • 2mm pin, 5.5mm barrel
  • Accepts 9-15VDC, either polarity
  • Requires 8W minimum startup, 6W continuous.

Control Jack

  • 1/4” TRS phone jack
  • If Midi selected, wired to the TRS midi standard
  • If footswitch is selected, Tip and Ring are pulled up to +5V with a 20mA current source
  • Footswitches should make momentary closure to ground.

On Board Footswitches

  • Optical interrupter sensors for zero wear operation