Walrus Audio MAKO ACS1 MKII Amp Cab Simulator Pedal, Second-Hand Item in good condition (Small marks or scratches) is an amplifier and speaker cab simulator delivering the sound and feel of world-class amplifiers, complimentary speaker cabinet IRs created by Tone Factor and York Audio, and controllable room size. With the ACS1, players have expansive options to deliver their tone on stage, in the studio, or practicing at home. Simple controls, stereo in and out, onboard presets, and MIDI support make the ACS1 an essential tool in a guitarists arsenal. Players can also load in their own IRs and update firmware at walrusaudio.io.The ACS1 contains six amplifier models based on fan-favorite amps, each with its place in music history, and twelve cab IRs (Impulse Responses) designed by world-class designers to give you the best tonal representation possible. The stock IRs for the Fullerton, London, and Dartford amp models were custom-engineered by David Hislop and Kenyon Reed at Tone Factor