TC Electronic Alter Ego X4 Vintage EchoTC Electronic has a legendary reputation when it comes to delay and this legend only continued when we partnered with ProGuitarShop to create the Alter Ego Delay pedal. It became an instant classic so fast it made our heads spin. Maybe it was the wide range of classic delay sounds, maybe it was the instant access to spot on tributes to the legendary delay units of yesteryear. We're not sure and we're not sure it matters. What does matter is this: