Arkham Oracle Impressions
Ok...so I've spent about an hour or so playing and tweaking and using different basses through it. If you are a TLDR (too long didn't read) sort or suffer from ADD...I'll sum it up. It sounds really good. I don't have them back to back, but it sounds right up there with the Shaw Tube Injection. I took the back off and I can see why. Just as in the Shaw, the entire preamp is hand wired...no PC boards (the transformerless DIs in the Shaw come from Creation Audio Labs ARE on PC boards). I read somewhere that Arkham didn't put an XLR out on the Oracle because of noise concerns with all that hand wiring in a small (sort of) enclosure. Sort of makes sense. Shaw solved that issue by installing pre-made DIs from CAL. Putting my RNDI under the board really makes not having a DI a moot point provided the sound man sends you phantom power.
The EQ is really very useful. The bass and treble knobs are shelved. So if you adjust them, you raise the entire bottom end or top end...not just a specific frequency. This is the way the Noble works too. The difference is the Range control. It moves the point at which the shelf pivots. And it makes HUGE differences. When I first started playing with the EQ it was too fat with not a lot on top...but moving the Range knob clockwise gave me more of what I wanted without moving the bass control.
The HPF switch would be useful if you were on a wooden stage or a boomy room and wanted to dump your bottom end. I find it doesn't do much for the tone through headphones. The Hi switch does what you expect. It gives you more treble. Yuck! The Mid switch is really fantastic. I rather enjoy it, but it's not something that will be "always on". The Lo switch does indeed give you more low end at a specific frequency, but I find you have to fiddle with the EQ again to get it sounding even. It's not as effective as the "Fat" switch on the Shaw...I never turned that off.
If I dime the gain I can get some overdrive, but it's not the same as power tube overdrive, it is sort of brittle sounding like all small 12AX7 preamps. I have the gain set to where it just starts to impart a little wool, then back it off a hair.
The master I have set about 1:00 and I could raise or lower it and compensate for it on the mixer...so it doesn't really matter much.
So do I like it better than the SLO? Yes and no.
It sounds better to my ears...but in a mix no one will know. It is a bit noisier due to my power feed not being filtered. When I had the SLO it was powered off my PowerMax which is isolated and filtered....dead quiet. So it's not really the fault of the Oracle, but I can hear my computer hard drive array clicking through it. I won't have that issue on a gig as I run a Fishman power conditioner.
It's a lot bigger than the SLO, doesn't have a cab sim, doesn't have an FX loop, doesn't have a headphone out, and doesn't have an Aux in. All things I didn't use on the SLO. The 120v power requirement and the size are the big negatives, but I have a right angle plug coming for the power cord to help keep the cord from sticking out and not fitting in my case (or having to unplug the power cord from the back).
So I'm torn. I love the SLO not just for how it sounded...and it sounded good...but for everything it could do in such a small package. It's like pulling for the little guy in a fight...the underdog. But products like the Shaw, Noble, and Oracle are really on another level quality and sound wise. The components inside the Oracle are top notch. If you are a tube roller, the Oracle is REALLY easy to do tube swaps in. Six screws to remove the back, and the tube is smack in the middle of the enclosure and you can easily get your fingers on it to wiggle it out. I have a Mullard high gain, low microphonic tube on the way from Tube Depot.
Verdict...it's awesome! Yet another great preamp option.