BBE Acoustimax in very good condition. Light scratches and a couple of small dings, see pics.

BBE Acoustimax Sonic Maximizer/Preamp Pedal

3-band recording-console-quality EQ with sweepable mid and low frequency notch filter. Phase reversal, ground lift, line level out, dedicated tuner out, TRS effects loop, and even a pre/post switchable DI output with pad make this a true studio-quality device that shines onstage. Hardwire bypass, non-slip rubber bottom, included 12V power supply.

The BBE Process--"What it Is"

Loudspeakers have difficulty working with the electronic signals supplied by an amplifier. These difficulties cause such major phase and amplitude distortion that the sound reproduced by the speaker differs significantly from the sound produced by the original source.

In the past, these problems proved unsolvable and were thus relegated to a position of secondary importance in audio system design. However, phase and amplitude integrity is essential to accurate sound reproduction. Research shows that the information which the listener translates into the recognizable characteristics of a live performance are intimately tied into complex time and amplitude relationships between the fundamental and harmonic components of a given musical note or sound. These relationships define a sound's "sound".

When these complex relationships pass through a speaker, the proper order is lost. The higher frequencies are delayed. A lower frequency may reach the listener's ear first or perhaps simultaneously with that of a higher frequency. In some cases, the fundamental components may be so time-shifted that they reach the listener's ear ahead of some or all of the harmonic components.

This change in the phase and amplitude relationship on the harmonic and fundamental frequencies is technically called "envelope distortion." The listener perceives this loss of sound integrity in the reproduced sound as "muddy" and "smeared." In the extreme, it can become difficult to tell the difference between musical instruments, for example, an oboe and a clarinet.

BBE Sound, Inc. conducted extensive studies of numerous speaker systems over a ten year period. With this knowledge, it became possible to identify the characteristics of an ideal speaker and to distill the corrections necessary to return the fundamental and harmonic frequency structures to their correct order. While there are differences among various speaker designs in the magnitude of their correction, the overall pattern of correction needed is remarkably consistent.

3 band, recording-console quality EQ with a sweepable mid-range band

Phase reversal

Ground lift

Line level out

Dedicated tuner out

TRS effects loop

Pre/post switchable DI output with pad

Hardwire bypass

Non-slip rubber bottom

12V power supply included

Specs

Frequency Response: 50Hz - 20kHz

Treble: +/-12dB @ 10kHz

Mid: +/-12dB @ 400Hz - 2.5kHz

Bass: +/-12dB @ 60Hz

Notch: 0 to -12dB @ 70Hz - 250kHz

BBE: Lo Contour +15dB @ 50Hz

Process: +15dB @ 10kHz

Noise: Instrument Jack -98dBv (unity gain)

Line Out: -88dBv (+10dB gain)

Max Output: +10dBu @ Instrument Jack

THD: 0.05% at 1kHz

Impedances: Input 2.2mOhm

Tuner Out: 2kOhm

Line Out: 1kOhm

Instrument Out: 2kOhm

XLR Out: 600Ohm

Power Requirements: DC inlet +12VAC min. 200ma

The BBE Process is so unique that 42 patents have been awarded by the U.S. Patent Office.