带立体声效果的是MS70 thegearpage MetalGuitard THere are several stereo effects in the MS70. Most are named Stereo Xxxxx and a few of them have a switch in the parameters for Mono. Also, make sure that any stereo effect you're running ( delay, chorus, etc ) is not BEFORE a mono effect in the signal chain. THe Zooms are not true stereo but it does have several stereo effects that pan.