Universal Audio Apollo 16
Sixteen channels in, sixteen out, all through DB25 snakes. It's a rack-space converter that made a name for itself in professional rooms before the desktop crowd noticed it.
Overview
The Apollo 16 has sixteen analog inputs and sixteen analog outputs, all on DB25 connectors, in a single rackspace with UAD-2 Quad processing onboard. Universal Audio positioned it as a professional high-resolution recording interface. The period advertising in Mix (December 2013, p.67) pitched 16x16 analog I/O plus UAD-2 Quad processing as "the new standard" for high-resolution work. Marketing copy is not a verdict, but it shows who the box was aimed at.
The Apollo 16 was part of a broader Apollo expansion. Universal Audio's Apollo interfaces had already earned a following for combining high-quality converters with onboard DSP usable in real time for tracking and mixing, and the Apollo 16 joined the family as the high-channel-count member. Mix (May 2014, p.54) described the unit as portable I/O with UAD DSP and either FireWire or Thunderbolt connectivity. It also noted that two Apollo 16s could be ganged for 32x32 operation. If sixteen channels were not enough, you bought a second one.
The conversion was the selling point. The Apollo 16 carried the same 16x16 analog I/O on DB25 connectors as the previous unit, but with improved sound quality from new converters and new monitoring functionality delivered through the updated Console app, according to Electronic Musician's coverage of the Apollo line. That generational improvement in signal-to-noise was a recurring theme across the Apollo range.
Connectivity is where these units get complicated on the used market. The Apollo 16 shipped in both FireWire and Thunderbolt versions, and the two are not interchangeable. Mix (May 2014, p.54) reviewed the unit with both connection options in view. Buyers today need to know which variant they are looking at before money changes hands. A Thunderbolt Apollo 16 in a modern rig is a different proposition from a FireWire one, so the listing photos and rear-panel shots matter more than the front-panel glamour shot.
The onboard DSP is the other half of the story. The UAD-2 Quad processing let engineers track through emulations in real time rather than printing clean and processing later. The Realtime Analog Classics bundle that shipped with the Thunderbolt systems included the 610-B Tube Preamp & EQ, Pultec EQs, Softube Amp Room, and legacy LA-2A, 1176, and Fairchild compressors, per Electronic Musician. That is a serious pile of processing to get in the box, and it is part of why these interfaces hold value.
In the studio, the Apollo 16 found its way into working rigs rather than hobbyist setups. Mix (May 2014, p.56) reviewed it from the perspective of a working engineer who brought along a passive monitor controller for a headphone send and talkback. That detail fits, because the Apollo 16 is a converter and interface, not a full monitoring section. It expects to be surrounded by the rest of a studio's infrastructure. One engineer's mastering and mixdown setup documented in Electronic Musician paired an Apollo 16 with a Dangerous Music 2Bus LT and an Avalon VT-747SP tube compressor/limiter, using the Apollo as the front end of a mixing chain rather than the center of a tracking room.
The Apollo 16 is not a desktop interface with a big volume knob and a couple of front-panel instrument jacks. It is a rack converter with DB25 I/O. The channel count is generous, the conversion is the point, and the UAD processing is the bonus. Anyone chasing one should confirm the connection type, the UAD processing tier (Quad), and the condition of the DB25 connectors, which take more abuse in a rack than front-panel jacks ever do.
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