Si600 Posted June 5, 2018 Share Posted June 5, 2018 I've noticed recently that when I switch my MB500 Fusion to the B channel the tone gets bassier and "muddier" I've got the settings to the high side of "middley" but there's definitely a change when I switch between A and B. B does have the gain (or whatever it should be called) nearly on full to deliberately get a crunch from it, effectively have a clean channel and a overdrive channel. I may have completely misunderstood how to use the amp of course. Quote Link to comment Share on other sites More sharing options...
Mudpup Posted June 5, 2018 Share Posted June 5, 2018 (edited) It's because you've switched the valves in.......it's supposed to make it a bit warmer (or muddier if you like) 😉 Edited June 5, 2018 by Mudpup Quote Link to comment Share on other sites More sharing options...
Si600 Posted June 5, 2018 Author Share Posted June 5, 2018 So I need to juggle the EQ controls to get a more consistent sound between the channels if I don't want such a big difference between them? Quote Link to comment Share on other sites More sharing options...
Mudpup Posted June 5, 2018 Share Posted June 5, 2018 2 hours ago, Si600 said: So I need to juggle the EQ controls to get a more consistent sound between the channels if I don't want such a big difference between them? I had one and didn't notice a massive difference between the 2 channels EQ tbh - it was quite subtle. It was mainly the Gain that made a difference. Channel B was just a touch fatter and valvey sounding, Channel A was crisper. Quote Link to comment Share on other sites More sharing options...
roman_sub Posted June 6, 2018 Share Posted June 6, 2018 When you are comparing, do you have gain and volume settings set exactly the same on both channels? I thought it was the same circuit for both channels, but you could just control the amount of tube saturation via the gain control, changing the tone (and reduce / increase output volume accordingly)? Happy to be corrected though.... Quote Link to comment Share on other sites More sharing options...
Si600 Posted June 6, 2018 Author Share Posted June 6, 2018 (edited) No I don't. I'm using the A channel as clean and the B as overdrive so the gain settings are just under distorting on the A and almost to the stop on the B. Volume controls are set so that there is no detectable difference in level when I switch between them. What I do notice is that the B is bassier than the A. I think I'm going to set it all back to the manual recommendations and start again, maybe with more crunch on my clean channel and make the B a bit more overdriven and sightly louder for solo infill. I'm going to go back and reread the Confusing Menage a Troi thread, see if that helps. Edited June 6, 2018 by Si600 Kant Spel Quote Link to comment Share on other sites More sharing options...
roman_sub Posted June 6, 2018 Share Posted June 6, 2018 OK in that case I think what you are hearing is not difference in channel A/B voicings, rather it's the difference in how the tube preamp responds when higher level of signal (Gain) is put through it. I think it's intended by design to let you have a cleaner and a dirtier sound via the two channels :-) Quote Link to comment Share on other sites More sharing options...
roman_sub Posted June 6, 2018 Share Posted June 6, 2018 I suppose nothing stopping you from trying channel A as overdrive, and channel B as clean... Quote Link to comment Share on other sites More sharing options...
Si600 Posted June 8, 2018 Author Share Posted June 8, 2018 Well that was interesting! I used it last night at our rehearsal session with a very quick setup, all the settings at 12 o'clock, both channel "gain" at half one-ish and the master "volume" very low so no-one died of internal bleeding and it sounded excellent. I may tweak the settings a smidgen over the coming weeks but it's a good basis for something that I like the sound of. Quote Link to comment Share on other sites More sharing options...
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