This is a pretty neat pedal. It has all kinds of effects that can, and will, totally transform your voice. It comes with 40 factory and 40 user presets. The user and the factory effects start out the same but the user effects can be tweaked and pretty much completely changed into a different effect, whereas the factory presets can not be changed. As long as I've had this pedal I haven't wanted to change any of the user effects so I don't know how user friendly that proess is for this particular pedal. I have used other DigiTeh multi-effects processers though, and they were very easy to make your own preset effects. The Vx400 doubles as a recording interface and comes with pro tracks recording software. This is a really awesome feature because you can start recording with just the push of the two left footswitches. Another awesome feature about the Vx400 is the expression pedal. The expression pedal is used differently for different effects, such as add more or less volume, change pitch and add more or less of an effect.

It is very easy to get started using the Vx400. You just power it up with the included power adapter and plug in a microphone and a speaker output and you're set. If you want to use the included recording software it takes a little more time. Everything you need is included on the disc and once you get all of the software installed you can hook up the Vx400 to your computer via the included USB cable.

The effects the Vx400 has are amazing. My favorite effect to use on this pedal is the pitch change. With the expression pedal in the heel position, you can get a low, bassy, monsterous tone, and then change to an extremely high pitched wine, in the toe position.

Manufactured for digitech by IVL technologies, is a High voltage mic tube pre amp, line level input, 4 band Eq, spdif and AES/EBU digital out at 18 bit 44k or 48k user selected, low cut, 20db pad, phase, and 48v phantom power, analog rms meter. Does a real good job warming things up. Nice OD is achieved using input and output gain knobs. Insert points are handy too. 2 rack space is needed for the massive power transformers. EQ is switchable to A/B adjustments. Clip meter is helpful to reproduce OD on things like snare and certain vocal sounds to imitate that vintage edge. Line level inpust are not good for instrument applications such as non-active bass and guitar.

Simple to use and better results than the sub $75.00 low voltage stand alones.

Good sound quality. Does not color the sound unless you add gain. Slightly overdriving a top snare mic or vocal really brings details out and adds a harmonic quality like a good old fender guitar amp does for guitars.