The Spark 2 from Positive Grid looks like a miniature old-school amp, but it is, essentially, a computer with some knobs and a speaker. It has Bluetooth, USB-C, and an associated smartphone app. It ...

Positive Grid launched one of our favorite modeling practice amps back in 2019, in the shape of the Spark. The family got smaller members in 2022 and 2023, and now the company is going gigging with ...

For many years the way to control spark-related engine knock was to downshift or ease off the throttle. Modern computerized engines now control it by simply retarding the timing. With that in mind, ...