For technical details, see the manufacturer's website, but basically it is a fully parametric EQ mono analog tape with three choices of frequency, gain + / -12 dB bandwidth pass filter above 80 Hz, true bypass, connection 1 / 4 "TS and balanced XLR. Supplied with food, format "third rack" especially useful. What do we want more? Edited by a computer, a MIDI controller? Who needs it? Not real musicians ... Memories (like the Boss EQ-20)? A musician who respects himself only uses two different EQ: Simply the bypass (not including the hacking of the knobs of the instrument itself ...). So nothing superfluous, nothing lacking.

UTILIZATION

Using this type of product requires little explanation, except perhaps the 80Hz high pass filter, which reduces the "rumble" for clarity. While it is intuitive for a job, the EQ-3B asks all the same, like any powerful equalizer, a time of research and trial and error (for that is not "pro" in the field). Ergonomics, nothing wrong on this point.

SOUND QUALITY

Versatility is ensured by the extremely wide bandwidth and dynamic depth: Suitable for all guitars, basses, keyboards, vocals. I use it on a Wurlitzer to give it more scale (deeper bass like a piano, warmer midrange, treble clearer): incredible, the sound now has more sustain! On a bass guitar DI, it is terrible, I boost the bass to 20Hz, for his deep infrabass with subtle, like a bass. Respect of the total, no breath.

OVERALL OPINION

A gem at the high end stuff reserved for pros, nabbed at 80 .- CHF to Cash Converters ... useless to discuss the price / quality ratio so. I do not sound professional, but the Presonus EQ 3B-suits me perfectly. More detailed critique: https://www.presonus.com/pdf/MaRkSOSJAN04.pdf