rrguitar":37jhgby6 said:
Two sides of the same coin really. The 100B is a lot more modern, in that it's got more of a low mid emphasis and a subdued treble that's never harsh. 100B's cleans are much better (very AB763-ish, no grit at all) and the effects loop is certainly much better with switchable pedal/line level. Crunch mode on channel one of the SLO is more open sounding and dynamic than the 100B's blue channel with less low end punch, though it's tighter as a result. SLO's OD channel is definitely tighter and more aggressive than the 100B's red channel, though the 100B's low mid emphasis is really nice for rhythms, just not all that tight. The red channel seems to have almost as much high end as the SLO, but in a different (lower) frequency range and a lot less presence. The 100B is also considerably more compressed, which makes for great liquid lead tones, but the SLO's percussiveness also makes for great lead tones. You can hear the Marshall base in both, but they're a lot more than that. SLO leans a bit more towards the classic Marshall bark, but with a wider mid response and incredible clarity/immediate response, while the 100B is saggier, smoother and more refined.
