This Behringer DD400 delay unit has a lot of great features. I particularly like the stereo outputs which allow the user to send the delayed signal to a separate amplifier for a dramatic stereo effect. The extra-long 1300 millisecond delay is great for Pink Floyd/David Gilmour style solos. The shorter delay settings allow for rockabilly slap back effects, although I hardly ever play in that style, so it doesn't matter that much to me.

Here's where it gets weird: I tested the unit using a vintage Fender tube amp for the primary signal and a Vox Valvestate amp for the delayed signal. As long as I played loudly, everything worked quite well. However, when I set the guitar down for a moment, I started hearing voices. Yes, voices! The delay unit was picking up radio frequency interference a la Jimi Hendrix at Berkeley. I have no idea HOW it was doing this, but I could clearly hear some sort of radio transmission like CB or family band radio. The interference went away after a few minutes.

As for design, I don't buy the "German innovation" advertising line from Behringer. This is obviously a cheap Chinese copy of the legendary Boss DD-7 which costs four times as much. If you want really good quality, buy the Boss unit! If you can get buy on a fairly cheap delay unit that talks to you from time to time, the Behringer is ok.
This Behringer DD400 delay unit has a lot of great features. I particularly like the stereo outputs which allow the user to send the delayed signal to a separate amplifier for a dramatic stereo effect. The extra-long 1300 millisecond delay is great for Pink Floyd/David Gilmour style solos. The shorter delay settings allow for rockabilly slap back effects, although I hardly ever play in that style, so it doesn't matter that much to me. Here's where it gets weird: I tested the unit using a vintage Fender tube amp for the primary signal and a Vox Valvestate amp for the delayed signal. As long as I played loudly, everything worked quite well. However, when I set the guitar down for a moment, I started hearing voices. Yes, voices! The delay unit was picking up radio frequency interference a la Jimi Hendrix at Berkeley. I have no idea HOW it was doing this, but I could clearly hear some sort of radio transmission like CB or family band radio. The interference went away after a few minutes. As for design, I don't buy the "German innovation" advertising line from Behringer. This is obviously a cheap Chinese copy of the legendary Boss DD-7 which costs four times as much. If you want really good quality, buy the Boss unit! If you can get buy on a fairly cheap delay unit that talks to you from time to time, the Behringer is ok.