The DP/4+ is the new enhanced version of the popular DP/4 Parallel Effects Processor. There are now 54 different algorithms available to the unit's four, separate Unit Processor DSP chips. These algorithms include reverbs, delays, chorus', flange, phaser, EQ, compressor and guitar distortions. New are the two algorithms designed to emulate the dynamic crunch of a Class A tube amp. There is also a vocal "remover" algorithm that works for instant karaoke or vocal practicing. The DP simultaneously processes four individual signals with four separate digital effects. You can also chain any two or more of the four effects together for multi-effects. The key is that you can configure the DP in just about anyway imaginable by routing the signal between the different processors. The DP/4+ features four balanced TRS (that's Tip, Ring and Sleeve or stereo 1/4 inch) inputs and outputs with a combination XLR/1/4 inch input jack on the right panel.