Positive Grid has collaborated with Zakk Wylde and Wylde Audio to introduce the Spark Mini Zakk Wylde Edition smart guitar practice amp. Limited to 100 units, each Spark Mini O’ Doom is hand-signed and numbered by Wylde. A custom front grille featuring Black Label Society’s “Skully” design is also included. The portable, battery-powered Spark Mini smart guitar practice amplifier features a loud, multi-directional sound and easy-to-use onboard controls. The Spark Mini can also be used as a Bluetooth audio speaker for streaming music or an audio interface for recording musical ideas.