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rouldug 05/08/2014

Yamaha SPX90 : rouldug's user review

« A special sound »

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It's a basic multi-effects including all sorts of reverbs, echoes, chorus, flanger, phaser, compression, and pitch shifting. Effects cannot be used simultaneously.
It has basic MIDI connections that can't be edited, except maybe with a PC via Midiquest, which is useful to recall the program you are looking for.
12bit audio processing technology, which is not very high and is technologically outdated.
The controls are not too practical (two +/- recall buttons and two +/- parameter buttons), but they are not complicated.
It's rack-mountable (1U).
Easy setup but its poor usability is tiring in the long run.


Easy setup but its poor usability is tiring in the long run.


This is where the unit is interesting, because it has very unique sound.
The 12-bit technology and the Yamaha digital processing make this multi-effects very particular and it suits all instruments and vocals. The chorus effect, with a very "wet" setting, is very good for guitar, bass, synth, and synth bass. The cathedral reverb is ideal for vocals.


I used it since it came out in 1985 and resold it in 1992 because I didn't use it and I wanted a multi-effects whose effects were better and could be used simultaneously, which I never did found, except at ridiculously high prices. In fact, I kept my other multi-effects, an old Boss SE50, which I use as a Swiss-army knife.
All my musician friends reprimanded me for selling it, since it has a unique sound.
And yes, the sound is great, very fat and percussive.
I regret having sold it.