Zoom's newly developed modeling algorithms use precise analysis of impulse response and frequency response to perfectly emulate the sonic characteristics of tubes and transistors found on classic amps. And we've duplicated all the internal circuit processes as well, so you can tweak your tone in exactly the same way as the knobs and switches on the actual amp. For even more tone control, you can move the accurately modeled condenser and dynamic mics to any position: close miking for a grittier sound, or off-cabinet miking for more room ambience.