Well I just swapped the scorpion out for a Celestion Vintage 30 (60watt). This was a substantial improvement! Icepick is tamed, and mid attack is smoother, overall headroom is much improved, and half the weight. Now when I switch back to the old bandit 112, it sounds like an AM radio in comparison. For basement use, I don't think I will ever exceed the speaker 60 watt rating.
As another experiment, I jumped the circuit relay that switches in/out the clean channel passive tonestack so that its still in the path even when in the high gain channel (that has its own active tonestack). As expected, much more EQ authority and flexibility.
Update:
The V-30 was nice with a dry midrage and zero "honk" attack, however a bit soft and distant for 80's metal. (Simply stunning for clean which I seldom play). Decided to try a Celestion G12K100 and like it much better. The G12K100 has a solid mid, zero honk, and dials into a perfect match with CD tracks.
Also, I found that jumping that K1A relay to keep both clean and ultra tone stacks in play was causing a noisy "clip" on hard/high notes if the clean volume was up more than 1.0 (the entire clean stack was fed into the ultra channel, volume and all). With this speaker, I dont need the double tone stack adjustability so I put the changeover relay back to stock operation giving a lower / fixed input level to the ultra stages.
Summary: Try speakers first. They CAN alter tone and attack substantially.
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