Unsurpassed effects, intuitive operation, and a diverse set of speaker emulations elevate this top box to industry standard status.
The three devices reviewed here cover similar territory as Universal Audio's $1,299 OX Amp Top Box. In some cases, the OX influence isn't exactly subtle.
We reviewed the OX almost exactly two years ago. I purchased the review model and have used it regularly ever since. The OX proved to be a hit, acquiring a large pro user base. It remains a go-to solution for low-volume recording and related tasks. I stand by the original review, and the device hasn't changed much since it debuted. So this is a rare opportunity to revisit a piece of gear after years of use while comparing its features to those of newer arrivals.
IRs vs. Modeling
Universal Audio refers to its emulating process as speaker modeling, not impulse responses. Impulse responses are realistic but static snapshots, whereas the OX aspires to mimic speakers in varying states, with a front-panel speaker breakup knob that introduces the harmonic variations that occur when speakers are pushed to extremes.
The OX's speaker emulations are magnificent. You get 22 superb models based on Fender, Marshall, Vox, Mesa, and Hiwatt cabs. There are six "usual suspect" mic models, and six virtual room mics. The room sounds are lush and realistic, and you can adjust the amount of room ambience via a dedicated knob on the box's front panel. You can also assign two virtual microphones to each cabinet, position them in virtual space, and tweak their characteristics.
But there's a downside to UA's proprietary speaker emulation process: You can't load additional IRs. I've never failed to find appropriate tones within the OX sound library. But if you insist on a specific speaker sound not included here, the OX may not be your best option.
Elevated Editing
The OX's software editor is attractive, powerful, and intuitive. Photorealistic depictions of the modeled gear make it easy to visualize your edits. You can store six favorite speaker/mic/effect combinations ("rigs") within the OX box itself and access them without connecting to a computer. The editors are available for Mac and PC. There's a mobile version for Apple iPads, but not for iPhones or Android devices.
The OX's software editor has the sophistication of a full-featured DAW.
You don't need a physical connection to edit the OX's sounds. The device includes its own WIFI network. Just connect your computer or iPad to the network, and tweak away. It's a great idea, but it is sometimes problematic in practice.
We must often go online while recording to access files, manage authorizations, and search for relevant data, which can mean constantly switching networks mid-session. Most pro users I know keep a dedicated iPad connected to the OX network, while the DAW's computer remains on its usual network. Even then, the iPad tends to drop its connection if it goes into sleep mode. I've always managed to get the job done via the OX's network, but this clever feature has never quite lived up to its promise.
Exemplary Effects
To my ears, Universal Audio's effects modeling is unsurpassed. The OX includes two dead-accurate models of classic recording gear: a Urei 1176 compressor and an EMT 140 plate reverb. There's also high-quality EQ and delay. All the devices covered here include excellent effects, and picking favorites is a subjective task. But to my ear, nothing else touches the OX's.
Other Noteworthy Details:
- The OX's impedance switcher supports 4, 8, and 16 ohms.
- The OX is an excellent direct recording preamp.
- The OX outputs sound via balanced stereo analog outs, digital AES/EBU, and optical digital TOSLINK. The analog outs are 1/4" TRS. But I've always wished there were pro-quality XLR outs, especially considering the OX's pro-level price. (The three newer devices all have XLR outs.)
- The attenuation level is continually variable, as opposed to using fixed steps.
- You can use one-, two-, and three-button footswitches (not included) to toggle the OX's effects.
- The OX has no MIDI control.
- The OX comes with 125 unusually good factory-preset rigs.
Despite the minor frustrations mentioned above, OX has been a miracle worker for me. I use it incessantly (including on many PG gear reviews) and I'm always delighted by the results.
The soulful slide wiz shows off his Teisco-inspired baritone and several "different" tone tools that have inspired his pandemic projects—including a knockout Custom Shop Jazzmaster.
Ariel Posen entered as a sideman. His scintillating work with the Bros. Landreth made him a guitarist’s guitarist. He’s since stepped out on his own to show he’s more than just shadowy specialist.
His 2019 solo debut, How Long, caught some fans off guard and shined brightly because of his song-first approach. “These days, I like listening to songs and the story and the total package,” Posen told PG in 2019. “I just trusted my gut and I can reach more people by playing songs, and I get moved more by a story and lyrics and harmony, so that’s where I naturally go. The live show is a lot more guitar-centric.”
But saying all that, Posen still gets down on the guitar. His slide might do most the talking (look no further than How Long’s sizzling “Get You Back”), but his fingerstyle flourishes and potent phrasing make him an all-around threat. And on top of all that, the dude can sing, too!
His brand-new album Headway expands on the success of How Long by incorporating more rootsy Americana vibes (“Heart by Heart” or “Carry Me Home”) and slinky neo-soul touches (“What Are We Doing Here”). And guitarists, don’t worry, he still cuts a grooving, silky solo (“Coming Back” or “Heart by Heart”).
Just before releasing his emotive, heartfelt 12-song collection, the burgeoning-songwriting guitarist virtually welcomed PG’s Chris Kies into his Canadian-home jam space.
In this episode, we find out how a $50-pawnhsop purchase inspired his No. 1—a custom-made, S-style baritone—and he explains why all of his guitars (and their tones) have to be “different,” and he goes through his travel-ready pedalboard that’s been grounded for over a year, but has still been a big asset for recording.
D'Addario XPND Pedalboard:https://www.daddario.com/XPNDRR
[Facing a mandatory shelter-in-place ordinance to limit the spread of COVID-19, PG enacted a hybrid approach to filming and producing Rig Rundowns. This is the 43rd video in that format.]
If you’ve spent any time with Ariel Posen’s first solo record, How Long, an auditory high mark might be the ripping, raunchy slide solo packed within “Get You Back.” As explained in a 2019 PG interview, Posen’s pairing for that song were two cheapos—a $50 Teisco Del Ray into a Kay combo. However, when he took the pawnshop prize onstage, the magic was gone. “It wouldn’t stay in tune and wouldn’t stop feeding back—it was unbearable [laughs].”
Posen was familiar with Matt Eich of Mule Resophonic—who specializes in building metal-body resonators—so he approached the luthier to construct him a steel-bodied, Strat-style baritone. Eich was reluctant at first (he typically builds roundneck-resos and T-style-baritones), but after seeing a clip of Posen playing live the partnership was started.
The above steel-bodied Strat-style is Posen’s second custom 25"-scale baritone. (On Mule Resophonic’s website, it’s affectionately named the “Posencaster.”) The gold-foil-y pickups are handwound by luthier Matt Eich and are actually mini-humbuckers. He employs a custom Stringjoy set (.017–.064 with a wound G) and typically tunes to B standard. The massive strings allow the shorter-scale baritone to maintain a regular-tension feel. And when he gigs, he tours light (usually two guitars) and so he’ll use a capo to morph into D or E standard.
If touring were a thing right now, Posen would take this Josh Williams Guitars’ Mockingbird on the road for open-C duties. (Again, also using a capo to unlock more doors while still traveling lean.) It speaks with a set of Ron Ellis PAFs that sit in the 7-8k range.
Another one that saw recording time for Headway is the above Fender Custom Shop Masterbuilt '60s Jazzmaster (by Carlos Lopez). Making it work better for him, he had the treble-bleed circuit removed, so when the guitar’s volume is lowered, it actually gets warmer.
Here is Posen’s Fender Ultra Telecaster that was recently upgraded with a sharp faux-tortoise-shell pickguard constructed by Chris Moffitt. (He’s a Northern Ireland-based luthier who works under the name Kithara Guitars.) Another mod he did to this tele was swapping out the stock Ultra Noiseless pickups for a vintage-voiced, ’50s-era, T-style set from Ron Ellis. For pandemic projects he’s had this one set in standard tuning and outfitted with Ernie Ball Slinkys (.012s).
Above is a Wide Sky Guitars P125 Cutaway model built by luthier Patch Rubin. The New Mexico-based shop focuses on classic singlecut, LP-style electrics and golden-age acoustics. The P125 features a chambered sapele body with a carved maple top, mahogany neck with a bound ebony fretboard, and it came loaded with a mixed set of Curtis Novak pickups—a P-90 in the neck and a PAF in the bridge.
Easily the wonkiest guitar in Posen’s collection is this custom ride created by Dahlberg Intruments. The body is based on their standard Crusader model, but the rest is unique to Ariel. Its fiesta red body is made from swamp ash, it has a walnut neck, a fretless ebony fretboard with aluminum fret markers, custom Lücking gold-foil pickups, and a rubber-coated floating wooden bridge.
On the surface, this looks like a junky ’50s Kay. And while you’re not entirely wrong, the guitar is quite playable and has a character all its own thanks to being fully refurbished (completely with a Seymour Duncan Hot Rails in the soundhole) by luthier Reuben Cox of L.A.’s Old Style Guitar Shop.
Posen’s favorite style of acoustic is a dreadnought. His prized Martin D-28 rests back home in Winnipeg, but during quarantine he’s been bonding with this Collings D1 T that’s seen work during recent recording projects.
If you’ve caught Ariel onstage, you’ve probably seen him plug into a Two-Rock. For the recording purposes of this Rundown, he fired up his Classic Reverb and routed it into the Universal Audio Ox Load Box.
Another tone machine used during the pandemic is Posen’s Revv D20 (sitting on top of the aforementioned UA Ox Box).
Posen toured with this setup for over a year before everything shut down. In the Rundown he mentions that he uses it quite a bit for sessions, proving to be flexible while compacted into a travel-friendly package.
Starting at the top left, you have a Chase Bliss Tonal Recall, Walrus Audio Monument, and a Chase Bliss Dark World. Down below that he has a Vemuram Jan Ray overdrive and a KingTone Germanium miniFUZZ. And the bottom row he has a Morningstar FX MC6 MIDI Controller and a TC Electronic PolyTune3 Mini Noir.
But wait … there’s more!! Underneath the top two rows sits a trio of stomps—a Mythos Pedals’ Argonaut Mini Octave Up, Eventide H9, and Ariel’s signature Hudson Electronics Broadcast AP that he leaves on all the time (cleaning up with his guitar’s volume knob).
Another big piece of the tonal pie for Posen is using his signature brass Rock Slide. He worked alongside Rock Slide’s Danny Songhurst to develop his namesake slide that features a round-tip end that helps Posen avoid dead spots or unwanted scratching. While he prefers polished brash, you can see about that it’s also available in a nickel-plated finish and an aged brass.