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BBE Acoustimax Acoustic Guitar Preamp Pedal

Perfect For Sprucing Up The Sound Of Any Electro-Acoustic Guitar

Written by

Elliot Stent

The BBE Acoustimax is a comprehensive analogue preamp pedal that can be used to shape and spruce up the sound of any electro-acoustic guitar. Following in the spirit of BBE's award-winning 386 preamp, the Acoustimax raises the bar for acoustic instrument sound quality and is packed full of flexible features that enable precise manipulation of your guitar's input signal.

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Powerful EQ

Equipped with an effective 3-band EQ, the BBE Acoustimax allows to you to effortlessly sculpt the key areas of your acoustic guitar's sound so that you can dial in a great tone for recording or live performance. The sweepable frequency knob is particularly noteworthy as it allows you to change the mid peak; perfect for finding that tonal sweet spot. The BBE Acoustimax thus offers the same level of control you'd expect from a premium studio mixing console.

Sonic Maximizer

BBE's Acoustimax preamp pedal features two footswitches - one for turning the unit on and the other for engaging its 'Sonic Maximizer' circuit. If you're unfamiliar with BBE, the company practically made its name from its rackmount Sonic Maximizer units which are still used extensively in studios today.

Made up of a number of filters, BBE Sonic Maximizers are used to enhance anaemic-sounding audio signals to record-worthy quality. The inclusion of this circuit essentially gives the Acoustimax another EQ/preamp stage that can be engaged all the time, or perhaps to accentuate a particular section of a song for variation.

Versatile Connectivity Options

Boasting a line level output, you can use the BBE Acoustimax as a tone-shaper before it is connected to an acoustic guitar amp or any audio source that relies on that type of connection. Alternatively, you can use the Acoustimax's DI (XLR) output for compatability with live mixers, so that it can be connected straight to a PA system. With pad, phase and pre/post switches on the rear panel too, you can optimise the Acoustimax to suit any system via the DI output.

About BBE Sound

BBE Sound is a familiar name in the music industry, and since their inception in 1985 the company has pioneered several noteworthy improvements in audio technologies. With their preamps, compressors and iconic Sonic Maximizers seen regularly in recording studios, broadcasting facilities and on stages all over the world; BBE Sound has established itself as a go-to brand for its class-leading audio processors and outboard gear.

A few years ago, BBE entered the guitar pedals market. Designed and engineered at their US headquarters, BBE pedals are built with high-quality components and use analogue circuitry to ensure optimal tones and studio-grade sonics.


  • Three band, recording-console quality EQ with a sweepable mid-range band
  • Low-frequency notch filter
  • Phase reversal
  • Ground lift
  • Line level out
  • Dedicated tuner out
  • TRS effects loop
  • Pre/post switchable-balanced DI output with pad
  • Hardwire bypass
  • Non-slip rubber bottom
  • 12v power supply included
  • Designed and engineered in USA


  • Frequency Response: 50Hz to 20kHz
  • Treble: ±12dB @ 10kHz
  • Mid: ±12dB @ 400kHz to 2.5kHz
  • Bass: ±12dB @ 60kHz
  • Notch: 0 to -12dB @ 70Hz to 250kHz
  • Lo Contour: +15dB @ 50Hz
  • Process: +15dB @ 10kHz
  • Maximum Output: +10dBu @ instrument jack


  • Instrument Jack: -98dBv (unity gain)
  • Line Out: -88dBv (+10dB gain)
  • Total Harmonic Distortion (THD): 0.05% @ 1kHz


  • Input: 2.2M Ohm
  • Tuner Out: 2k Ohm
  • Line Out: 1k Ohm
  • Instrument Out: 2k Ohm
  • XLR Out: 600 Ohm (* 0dBu=0.775Vrms)

Power Requirements

  • DC Inlet: +12 VAC min. 200ma
Inc. VAT

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