For sale is a Positive Grid Spark 40 Smart Guitar Amp in the stylish Pearl White finish. Positive Grid Spark 40 Smart Guitar Amp - Pearl White -. Positive Grid Spark 40 Pearl White amplifier. Bluetooth audio streaming, 1/4" guitar input, 1/8" AUX input and headphone output, USB audio interface (1-in/2-out) for direct recording to computer (compatible with macOS/Windows).
