Positive Grid Two Stone SP50 Amp is available under the Glassy amp group and is inspired by the Two Rock Studio Pro 50.

According to Two Rock

The Studio Pro is Two-Rock’s workhorse amp, providing the ultimate clean platform for defining your sound. The essence of Two-Rock’s 6L6-based single-channel clean platform with a knack for professional-level performance and versatility, the Studio Pro incorporates a range of tone shaping controls, including Master Volume, Gain, Treble, Middle and Bass (with pull-boost), Expansion Level and Contour controls. Delivering extraordinary clean headroom and dynamics with pure Two-Rock clarity, the Studio Pro features Two-Rock’s signature reverb with Send and Return controls along with a half-buffered effects loop for voicing options.