TC Electronic D-Two Multitap Delay

The D-Two is a dedicated stereo multitap delay — one rack unit, analog and AES/EBU I/O, built specifically for the live environment where a delay has to behave musically without you babysitting it. On the monitor side it earned its reputation as the go-to slap for lead vocals: dial in a rhythmic tap pattern that sits in the pocket of the song, engage the dynamic ducking so the repeats tuck back when the singer is pushing hard, and the effect becomes part of the performance rather than a distraction from it. FOH engineers use it the same way, sending a vocal aux through it and returning it as a discrete wet channel.

The port layout is straightforward and honest for a touring box: balanced XLR analog in and out on both left and right, plus an AES/EBU pair for facilities that want to stay digital end-to-end. Power draw sits between 14 and 18 watts — essentially nothing on a rack's power budget. At 2.9 kg and 195 mm deep it fits in a shallow tour rack without complaint. What the specs don't tell you is the ducking implementation: it's program-dependent attenuation tied to the input level, which means busy vocal phrases eat the tail automatically and clear passages let it breathe. That behavior is what kept this unit on riders long after TC stopped building them.

If you can find a clean one, it belongs in a vocal-forward monitor rig or any FOH effects rack where a single-purpose delay with intelligent ducking saves you from riding a fader all night. It is not a reverb, not a multi-effects unit, and not a substitute for a general-purpose delay if you need complex modulation or extensive preset management across a varied show. It also is not in production, so factor in the used-market reality: budget for a calibration check and a backup plan. Engineers who need that specific ducked-slap behavior and don't want to replicate it in software or a more complex box will understand immediately why this one stays in the rack.