I think I've owned 2 of these, neither of which I paid for. These are quadraverbs with hi-z inputs available and 'guitarist friendly' presets. Alesis made great efforts not to have these sound as bitty as a lot of the affordable digital multi-fx racks of the era, but in doing so they seems to have filtered out a lot of the treble. This is a funky sounding box with a weird frequency response. The effects sound very compressed as well whether there's a compressor running or not.
I renamed all the factory presets on the 1st Quadraverb I owned. For instance, King's Hall became King's Dungeon and 5 Band Graphic EQ (who the hell uses a digital multi-effects box to EQ their guitar signal?) became 5 Man Anal BBQ.
There are some interesting delay, modulation and verb things you can pull off with this, but I prefer the Yamaha spx90's sound. Its unabashedly early digital. Or if I want good digital sounds TC and Lexicon stuff is miles ahead.