I got a 2nd hand Mark III Simulclass green stripe last year and after dabbling with several amps in-between I honestly can't imagine playing through anything else. I have no idea why this amp is so underrated
I play metal and with the right set of tubes in there it's a ferocious monster (I tried several different tube kits until I found the one for me) It's now packing so much gain I don't need to use a tube-screamer to boost de-tuned riffs. It's a snarling demon of an amp and it's always up for a fight.
I also own a Mark IV and in my opinion, the Mark III eats it for breakfast, even with a similar tube set up! The Mark IV just sounds restrained in comparison to this beast but that's my ears. Everyone's different. I'm not knocking the Mark IV, I enjoy that amp too but I use it for lower-gain things.
I've seen lot's of people complaining about "fizz" and they're turning their presence knobs down to zero. When I first got this amp I experienced some fizzy distortion too but when I replaced the tubes the problem vanished. Now I can use the presence knob again and craft better tones. If you're suffering fizz just experiment with tube kits until you find one that tickles your fancy
EDIT: I forgot to mention, I got to use a Mark IIC+ for a while and the Mark III (green stripe) sounds pretty much identical to it, it just has slightly more gain to my ears. It also sounds livelier and crunchier (but only ever so slightly) I think it's just a higher gain version of the IIC+, the so called holy grail of Mesa's.
I think the Mark III is unpopular because it's too aggressive for some guitarists to handle
I play metal and with the right set of tubes in there it's a ferocious monster (I tried several different tube kits until I found the one for me) It's now packing so much gain I don't need to use a tube-screamer to boost de-tuned riffs. It's a snarling demon of an amp and it's always up for a fight.
I also own a Mark IV and in my opinion, the Mark III eats it for breakfast, even with a similar tube set up! The Mark IV just sounds restrained in comparison to this beast but that's my ears. Everyone's different. I'm not knocking the Mark IV, I enjoy that amp too but I use it for lower-gain things.
I've seen lot's of people complaining about "fizz" and they're turning their presence knobs down to zero. When I first got this amp I experienced some fizzy distortion too but when I replaced the tubes the problem vanished. Now I can use the presence knob again and craft better tones. If you're suffering fizz just experiment with tube kits until you find one that tickles your fancy
EDIT: I forgot to mention, I got to use a Mark IIC+ for a while and the Mark III (green stripe) sounds pretty much identical to it, it just has slightly more gain to my ears. It also sounds livelier and crunchier (but only ever so slightly) I think it's just a higher gain version of the IIC+, the so called holy grail of Mesa's.
I think the Mark III is unpopular because it's too aggressive for some guitarists to handle