Coming from a V-4B, what you are hearing as "steril[ity]" is simply called "lots of headroom" – and it is the main reason folks want high wattage amps in the first place: to gain better control over distortion. That new amp of yours has to be pushed a whole lot harder to sound compressed, while it came easily to the Ampeg (in fact, being so hard to avoid "at volume" that it can be considered an integral part of that amp's tone).
With extreme headroom amps, very little good stuff that goes on in your tone can happen by accident. The responsibility to get the tone you want is all on you. They're unforgiving in that way. The warm squishiness you're used to always being there doesn't come naturally with volume the same way it does on lower headroom amps. You need to manipulate/control your preamp very deliberately now in order to get it. Thus, you need to be very aware of the exact technical elements that make up your desired tone, so you can dial them in manually.
Mess around a lot more with the EQ, and don't be afraid to give it some more gain. Avoid a scooped e.q. if you find your tone lacking presence. Be careful with the high mids and the treble; they will inherently sound far more clattery, cutting, and sterile than they will on your V-4B, since they are so much less distorted. I have taken to running the highs on my PF-800 quite a bit lower than I had run them on my B-100R for 20+ years. It was a very strange adjustment at first, but I've pretty much got it now. You just have to be a lot more deliberate when setting your tone, especially when it comes to compression/distortion. A lot of the yummy, squishy, warm stuff that comes naturally to a lower headroom amp, you have to specifically tell a higher headroom amp to do.
With extreme headroom amps, very little good stuff that goes on in your tone can happen by accident. The responsibility to get the tone you want is all on you. They're unforgiving in that way. The warm squishiness you're used to always being there doesn't come naturally with volume the same way it does on lower headroom amps. You need to manipulate/control your preamp very deliberately now in order to get it. Thus, you need to be very aware of the exact technical elements that make up your desired tone, so you can dial them in manually.
Mess around a lot more with the EQ, and don't be afraid to give it some more gain. Avoid a scooped e.q. if you find your tone lacking presence. Be careful with the high mids and the treble; they will inherently sound far more clattery, cutting, and sterile than they will on your V-4B, since they are so much less distorted. I have taken to running the highs on my PF-800 quite a bit lower than I had run them on my B-100R for 20+ years. It was a very strange adjustment at first, but I've pretty much got it now. You just have to be a lot more deliberate when setting your tone, especially when it comes to compression/distortion. A lot of the yummy, squishy, warm stuff that comes naturally to a lower headroom amp, you have to specifically tell a higher headroom amp to do.
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