Stacker

Stacker is a simple plugin to quickly add width and thickness to your vocals.

The plugin uses a combination of pitch-shifting and delay to create two hard-panned variations of your main vocal. The plugin lets you set the pitch and delay time of the variations, and lets you control the width and tonal color of the effect. It also has a feature to mute the original signal, so you can use the plugin to create a stereo pair of backing vocals to complement your main vocal.

Stacker is particularly powerful placing it right before Screamer in your vocal chain, creating a modern and massive sound.