Dave Friedman of Rack Systems posted this, regarding ed's live rig.

The head goes into a dry center cab. A line out that I made is taken off the head spk line and it feeds a pcm70. The pcm splits to stereo and on either side he has a Roland sde 3000 delay for stereo echo then to a h&h v800 power amp. The power amp powers 2 more cabs and there are switches on the board for the pcm 70 and the sde3000 delays. The pcm 70 is used for cathedral. Heads are stock cabs are stock. Dave Friedman