This is a picture of the rack John used for the 2002 World Tourbulence tour. Among the various units there are two TC Electronic 2290 delay units (third and forth from bottom to top). Confirmation of this being John's rack can be found in [this diagram from *Guitar Geek*](http://www.guitargeek.com/john-petrucci-dream-theater-guitar-rig-and-gear-setup-2002/) and [at :15s in this video](http://youtu.be/4yUUCRJGdko).more
As part of his 1988 Soldano/Cornish Guitar Routing System, Eric Clapton used the Furman PL-8 Power Conditioner and Light Module, a SAMSON UR-5D UHF wireless receiver, a SAMSON BR-3 VHF receiver, a Drawmer 1960 tube compressor, a YAMAHA SPX-90 multi-effect processor, a Dyno-My-Piano CS-5 Tri-Stereo Chorus, a TC Electronics 2290 dynamic digital delay, a DYNACORD CLS 222 Leslie simulator, a YAMAHA GEP 50 multi-effect processor, a Roland SDE-3000 digital delay as well as the TC1210 spatial expander with VHS/UHF aerial unit at rear.more
"He also uses a Lexicon PCM-70 to store the circular delay sounds you hear in songs like "Shine On" and "Time." Because it has a multi-tap function, it can pretty accurately duplicate the kind of echo Dave used to get from his old Binson echo unit. A t.c. electronic 2290 is his primary delay -- it's what he uses for most things." - [Phil Taylor, David Gilmour's guitar tech.](http://www.pink-floyd.org/artint/dagear.htm)more
"I used the effects loop of a TC 2290 that bypassed the harmonizer’s return, but not the send to it. Then when I wanted to sound backwards, I could kick the effect in instantly," says Henry Kaiser, in [this article](http://www.premierguitar.com/articles/Henry_Kaisers_5_Essential_Effects), by Premier Guitar.more
"I used those with a variety of rack effects like the Yamaha SPX 90, and TC Electronic 2290, and Eventide H3000 in a stereo set up. A little later I also used a Roland GP-8. Slightly off topic, my Dad liked the sound of many of my presets on the GP-8 so I went to Guitar Center and bought him one. I copied all of my presets into it and he used it extensively on his 1988 tour. The clean sound that you hear him soloing with is him playing his blonde Performance Guitar through the GP-8."more
In [this interview](http://www.musicplayers.com/features/guitars/2007/0407_Steve_Rothery.php), Steve Rothery says, "I decided on the Marbles album to incorporate one of my 2290s, so that does most of the switching because it’s instantaneous with patch changes, and it’s a great sounding unit anyway, which also meant I could use other things in the loops for that."
The 2290 is among many effects used by Robert per this [archived version](https://web.archive.org/web/20040213203727/http://archive.guitarplayer.com/archive/artists/thecure.shtml) of an April 2000 edition of *Guitar World* magazine. *Sound on Sound* also lists this as part of The Cure's gear set up [here](http://www.soundonsound.com/sos/1996_articles/jun96/thecure.html).more