DigiTech GSP21 Pro

Multi-effects rack 1 U, 128 prog, with pedal (PS / 2 cable standard), MIDI
- Compressor
- Disto
- EQ
- Ehancer
- Noise Gate
- Chrorus
- Flanger
- Delay (single, stereo, 4 tap)
- Reverb (short, long, immeeeeense, reverse)

Editing effects on small LCD screen via 4 buttons param possibility of appointing its configs, the name is displayed on the pedals. It is divided into 2 rows of 6 pedals. The first 5 of the top 5 programs are short (going to the top 5 following the sixth pedal). The bottom 5 are the effects of the selected program, which can independently disable (1. Comp 2. Disto 3. Chrorus or Flanger, 4. Delay, 5. Reverb), just as if had five separate pedals. The last (sixth if you follow the bottom is a general bypass).
MIDI connection I used to change my channel tube preamp, noon also.

UTILIZATION

Difficult to be objective as after use but I do not remember too struggled to configure the bazaar. There are cross-references from pre-programmed effects for which configures all the effects independently. Almost all combinations are possible, except for a few effects (eg reverb multi tap delay or reverse)
The manual was complete, and once the hand made, adding / editing effects is very simple. But it's been 20 years that I know so ...

SOUND QUALITY

Loop in my chain, I do not serve all purposes. I've never used the distortion for example, move along, there's nothing to listen to. However, I use modulation effects chorus + flanger, as well as delays and reverbs. I tend to use a little effect compressor and EQ clear sound. I use Vigier Excalibur and H & K preamp lamps + amp + cabinet Fryette Mesa Rectifier. Personally, I find the quality very good effects, and many settings can have a wide range of sounds. In a word, it sounds!

OVERALL OPINION

Purchased 6500 francs in 1991, it's certainly expensive considering what happens now, but I well damped. I changed one once the internal battery (to store the prog appliance off) I replaced a battery A (battery model was found), and once the cable PS / 2 pedal who had a bad contact after 15 years of use.
Evidence that this was the right choice, it is always in my rack.

Most: quality chorus, flanger, delay and reverb, 128 prog, MIDI, solid
Cons: the distortion, given the oversupply and quality pedals, do not count on it