The Kuassa Efektor OD3603 is rock n roll in a box. One thing guitarists have always strived for is volume. In the early days of electric guitars and amplification, players pushed the gain on their amps to the limit which resulted in saturated sound, enhanced sustain and an undeniable rawness. The Kuassa OD3603 recreates those varied sounds in one compact unit. The Efektor OD3603 features Blues Overdrive which imitates overdriven British amps, Boutique Overdrive for a custom made overdrive that sounds fat and dynamic, Mad Overdrive is hard and thick yet retains the dynamic of your playing, Modern Overdrive can be pushed into dense distortion and Pro Overdrive delivers warm and tight classic screamer sound.