Blackstar Fly 3-3-watt 1×3 inch Compact Mini Guitar Amplifier w/ 2 Channels and Patented ISF – Black

Refer the user manual below for troubleshooting
Digital ‘tape’ delay effect; Patented ISF (Infinite Shape Feature)
Sonic Performance The use of a full range driver eliminates the need of a subwoofer; This has the benefit of removing the requirement for a crossover and the negative sonic impact that can have; The key part of a guitar’s tone occurs in the frequencies that are normally affected by a crossover and for music playback the performance is similar to nearfield monitors
Attention to Detail Countless hours were spent on the design of the cabinet to achieve a sonic performance not normally found in a mini amp; The housing is sealed and tuned to ensure optimum tonal response and the material used has been mathematically modelled to have the Young’s Modulus of wood; This retains the bass response usually associated with a wooden cabinet

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