Starting a new thread on the old AXE FX topic but it seems somehow appropriate. I've been experimenting with outputs on my rig. I've got a K12 newly purchased last moth thats seem three gigs so far. Which I am digging, but it's still missing that amp in the room feel. My understanding is that it's how it projects the sound that causes the different feel and not so much the power amp in it. It's a monitor after all and not a guitar cab.
So following the manual's as vice I tried the Ultra direct through my Blues Deluxe/ JBL D120 combo. The manual says to turn the bass and treble to 0 and the mid pot to 10 and your guitar amp will not colour the sound. The JBL helps as well as its designed to be very transparent or at least that is the theory on this model of speaker.
The results on clean tones were a bit harsh but on overdriven tones it's totally juiced. No need to turn off amp blocks or even speaker IR's.
So the next step was to try it through my 73 twin and JBL cab setup. The results were a notch up. Close but still no cigar.
Where I'm going with this was I was wondering what a power amp would be like with the FX rig. There has been a BGW power amp from the 70s on our local CL all summer and being a very small world it turns out it was a friend selling it who jams with us even so often. He bought two of them new in the mid 70s to power his stage wedges.
In researching this model the only decent references I came up with we're from RUKind and from the Fractal forum. It seems on the fractal forum there is some crusty old blues player who claims Fractal's own power amp is almost as good as his old BGW 250.
If you follow the Fractal forums you will also find out that Cliff the fractal inventor uses a power amp setup and not a powered monitor for his personal rig.
The results are almost night and day from the K12. The my JBL cab gives the Ultra a huge sound when paired with a really high quality power amp. The downside is the hassle, the powwr amp is one extra piece of gear, but the upside is it sounds so good on every setting Ive got dialed in with the cabs and amp sims on that I'll be using it for backline but still go direct to frontline when doing larger gigs and it sounds even better when paired with the k12 in a blended Sterio setup. It really shines on the deluxe reverb, brown face and twin reverb settings. Especially on the deluxe reverb settings.
More gear but it was an easy trade, a Namo reverb pedel and 100 bucks for a vintage studio quality power amp. It also has significantly more juice than the K12, Probally due to the massive transformers and the high db sensitivity of the JBLs.
I'm interested to hear what other folks are using with their Jerry FX rigs. In my books I've stumbled upon a pretty decent compromise between digital and analog.