The ACS1 lets you expand your amp sounds the easy way, with a form and design that fits neatly into your rig. It's super-practical for the gigging musician, but will also find its uses in the studio.

MusicRadar verdict: You can go as deep as you want here with the huge array of sounds in a compact unit. The M1 is an especially rewarding pedal for fans of lo-fi and ambient modulation, or indeed ...