Some things you can capture like the TYPE of tone. You can for example capture the fact that an amp sounds like a vox or a marshall. But the quality of the tone.....no way no how. And like i said, in large part because what makes killer tone is not the sound itself that you hear, but the way it responds, or as people often cal it, "touch sensitivity". IMO that is what separates great from just good or mediocre. that cannot be recorded.
Personally, whie this amp also SOUNDS great, i have never been one to be anal about the perfect tone. It's the perfect touch that i'm after, and if the sound itself is as good then i consider that the cherry on top. But if you offered me the choice of legendary tone like a dumble tone or TW or whatever, but without the touch aspect, i would take the tone of a average production amp like a peavey classic 30 or such if it had touch over the dumble ! I first noticed the importance of that aspect many years ago when i bought an amp i thought sounded amazing to replace my main amp of several yours. I tried to gig the new amp but i had mostly really bad nites where i played my worse. Eventually i realized what it was and went back to my old amp, which was a great sounding amp not not amazing like the new one, which i promptly sold. But that old amp just had touch dynamics that were great and the new one had none to speak of. Had the same thing happen once with a acoustic guitar. A larivee that sounded fabulous. It recorded great too. Just a fantastic sounding guitar. But after a while i never wanted to pick it up. Came to realize it was due to the fact it had no dynamics. It always felt and sounded like i had a compressor on whichmade it a total bore to play. I sold it and bought a recording king for $300 that was much better ! I don't recall what the larivee listed for, but it was $3000 last time i looked a few years ago.
I maintain that among guitar players the majority don't even recognize that it's touch they are after. They think it's the sound, but it's not that which allows thier playing to excel. It touch sensitivity, and when they play and amp like that they recognize how great it is, but they don't realize WHY they feel it's great. they think it's the sound. I was the same way till that incident years ago. This is why clips are so requested on guitar forums.
I remember a quote from Aspen Pittman of groove tubes many years ago that i read in a interview. He said, and i'm paraphrasing, it's not that solid state amps don't sound great, it's that they don't feel great. That stuck with me and one of the most important things i ever read about tube amps, an yet rarely do i hear people on forums speaking about that aspect when discussing amps and what is great and what isn't.
Oh, and to your question....open back with EV12L, my fav speaker in most any amp for decades. This one has gone to 100's if not 1000'sof gigs with me in many different amps. And speaking of touch, the 12L has a feel i like more than any celestion i've used which is why i love it so much. yet sound wise there are some celestions i like over the EV. I suppose a 2 speaker setup with both might be a good idea, but i also love the lightest gear possible, and one thing you DO NOT want is more weight than that EV already saddles you with.

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