Elite Audio Conversion with Eight Unison Mic Preamps, HEXA Core Processing, and Surround Sound.
Apollo x8p allows music engineers, producers, and project studios to track, overdub, and mix with new world-beating A/D and D/A conversion, HEXA Core UAD plug-in processing, Dual-Crystal clocking, and 7.1 surround sound monitoring — all in a sleek rackmount Thunderbolt 3 audio interface for Mac or PC.
Built upon UA’s 60-year heritage of audio craftsmanship, this 16 x 22 interface laps the competition with eight Unison™-enabled mic preamps, providing authentic emulations of preamps from Neve, API, Manley, SSL, and more, plus all-new HEXA Core processing — yielding 50% more DSP for running UAD Powered Plug-Ins in real time.
Record with elite-class A/D and D/A conversion — nearing the widest dynamic range and lowest noise available, at any price
Mix with powerful HEXA Core processing, featuring 6 UAD DSP chips for running more UAD Powered Plug-Ins in real time
Track through 8 Unison-enabled mic preamps — with fully authentic emulations from Neve, API, Manley, Helios, and more
Integrate with high-end commercial systems, via 7.1 surround sound monitoring and selectable +24 dBu headroom
Elite-Class A/D and D/A Conversion
With thousands of hit songs and hundreds of Grammy-winning albums under their belt, Apollo interfaces are no strangers to tracking stellar-sounding records. To improve on the previous generation Apollo interfaces’ class-leading audio conversion, UA engineers obsessively auditioned the latest A/D and D/A converters — ultimately pairing elite-class 24-bit/192 kHz converters with all-new analog circuitry for an ultra-pristine signal path.
The Apollo X series also introduces new Dual-Crystal clocking — featuring dedicated crystals for 44.1/88.2/176.4k and 48/96/192k sample rates — resulting in stunningly low jitter, measured at less than 10 picoseconds. This translates into pure, artifact-free recordings and solid stereo imaging you can trust.
With 129 dB dynamic range and -119 dB THD+N, Apollo x8p’s open, natural sound rivals any dedicated high-end converter on the market — regardless of price — and is the perfect starting point for applying UAD processing.
Realtime UAD HEXA Core Processing
Apollo x8p features new HEXA Core processing, with six DSP chips and 50% more UAD plug-in processing power than previous Apollos. This lets you run more UAD plug-ins, whether you’re tracking in real time with channel strips from Neve, Manley, or API, or running high UAD plug-in counts when mixing in your DAW.
From the tube warmth of Pultec EQs on guitars to the musical tube limiting of the LA-2A on vocals, or the pump of a genuine 1176 or Fairchild 670 tube compressor on drums, your recordings will take a giant leap forward with a rich, three-dimensional analog sound that UAD plug‑ins provide.
Unison Technology: The Genuine Sound of Neve, API & Manley Preamps
Perfect for engineers, producers, and project studio owners, Apollo x8p features eight Unison-enabled mic preamps, letting you track large projects through exacting mic preamp emulations from Neve, API, Manley, Helios, SSL, and Universal Audio. A Universal Audio exclusive, Unison technology nails the tone of these sought-after tube and solid state mic pres — including their input impedance, gain stage “sweet spots,” and the component-level circuit behaviors of the original hardware.
The secret to Unison is its hardware-software integration between Apollo’s mic preamps and its onboard HEXA Core DSP Acceleration. Simply place a Unison preamp plug-in on your mic input in Apollo Console software, and it physically reconfigures the Apollo interface's impedance — so you can tap into the classic sounds of the world’s most recorded mic preamps.
Watch the Unison Shoot Out
What happens when you put Apollo’s Unison preamp models up against their vintage analog counterparts? Producer Jacquire King (Tom Waits, Kings of Leon) finds out at the legendary Blackbird Studios in Nashville.
A Full Suite of Classic
Analog Processing Onboard
Of course, a hallmark feature of Apollo is its Realtime UAD Processing, letting you run the full library of UAD plug-ins with near-zero latency. Apollo x8p includes the Realtime Analog Classics Plus plug-in bundle, so you can record and mix with the world’s only authentic Teletronix LA-2A, 1176LN, and Fairchild compressors, the Unison-enabled UA 610-B Tube Preamp & EQ, and legendary guitar and bass amps from Marshall and Ampeg.
See Included Plug-Ins | Watch the live tracking video
Access the World of UAD Powered Plug-Ins
Going beyond the included Realtime Analog Classics Plus plug-ins, Apollo x8p lets you tap into the full UAD Powered Plug-In library of legendary vintage EQs, compressors, reverbs, tape machines, channel strips, and more — at near-zero latency, regardless of your audio software’s buffer size and without taxing your computer’s CPU.
With exclusive emulations from SSL, Neve, Studer, Manley, Helios, API, Ampex, Lexicon, Fender, and more,† it’s like having a studio full of iconic analog gear, in a single rack space. And unlike competing interfaces, these award-winning DSP-powered plug-ins are also available in your DAW for mixing.
†Apollo x8p includes the “Realtime Analog Classics Plus” UAD plug-in bundle. Other UAD plug-ins sold separately at www.uaudio.com.
Surround Sound, Talkback, and More
The Apollo x8p features built-in front-panel monitoring functions including a Talkback mic, Alt Speakers, and assignable Dim or Mono control. Plus, with its comprehensive 7.1 surround monitoring support, Apollo x8p is a boon for engineers and producers working on audio and music for video games, television, and the web. In addition, Apollo x8p offers selectable +24 dBu operation for out-of-the-box compatibility with professional mixing consoles and other high-end pro audio equipment.
Build an Expanded Studio System Over Thunderbolt
Apollo x8p offers 16 x 22 simultaneous inputs/outputs (8 x 8 analog I/O) and two built-in Thunderbolt 3 ports. This allows users of any Thunderbolt-equipped Apollo Twin or Apollo rackmount audio interfaces to easily combine up to four Apollos and six total UAD-2 devices — adding fast, high-bandwidth I/O and DSP as your studio grows.
Apollo X Tech Talk
Universal Audio’s Senior Product Manager, Gannon Kashiwa dives deep into the key features, specs, and development behind the latest generation of Apollo audio interfaces.
“I love my new Apollo x8p! I can mix without worrying about the amount of plug-ins I use, and the new converters reveal the most subtle details when I record. One of the best upgrades that I’ve added in a long time.”
– Derek ‘MixedByAli’ Ali (Kendrick Lamar, SZA, Childish Gambino)
“WOW! I thought the second-generation Apollos were great, but these new Apollo X models sound so good, they will redefine the way records are made.”
– Jacquire King (James Bay, Kings of Leon, Tom Waits)
“This is the best-sounding Universal Audio D/A ever. By far. It has an extra octave of clear bottom, but it's not hyped. It's just very solid and full. It's like there’s no converter generated signature at all. It’s completely open and natural.”
– Fab Dupont (David Crosby, Shakira, Santigold)
Apollo: The Choice of New-School Professionals
Apollo is the confirmed choice of hit-making professionals, used to record landmark albums by Kendrick Lamar (DAMN.), Chris Stapleton (From A Room: Volume 1), Arcade Fire (Everything Now), Post Malone (Beerbongs & Bentleys), and many more. The Apollo range of interfaces has earned numerous industry awards from Sound on Sound, Future Music, and Electronic Musician — as well as the prestigious 2016 TEC Award for computer audio hardware.
Apollo Artist Sessions
Watch producer/engineer Fab Dupont (Jennifer Lopez, David Crosby) record Latin superstars Monsieur Periné live in Colombia with Apollo X audio interfaces.
View All Apollo Artist Sessions
August 13, 2019
Zium zium urrrrrrr, fastest of them all, reminds me of old days in the studio, love it more and more everyday, keep that boppin UARead More
August 12, 2019
Excellent piece of kit
Sounds great. Worth shelling out for. Preamps sound fantastic. Included plugin bundle (analogue classics) could do with a bit of a refresh, but it's a freebie so I can't complain.Read More
July 30, 2019
I was always a bit sceptical about UAD! never bought one and always worked with native plugins. My old interface stopped working and had to buy a new one with enough inputs and mic pre amps...Read More
July 12, 2019
Insanely easy to use, lovely sound!
I'm a recording aficionado on the process of turning to the pro side with a medium sized project studio. For this reason I decided to give a try to the new X series Apollo interfaces,...Read More
July 8, 2019
Sounds clean and transparent. I never imagined the Unison preamps would be so effective. Now I just recall presets to load either the Neve or SSL channel strips to every input before...Read More
July 4, 2019
I was recording with an korg multitrack before i bought an apollo x8p. The difference is night and day. The clarity, the 'open' sound of the unit it self... I like the customer service...Read More
Realtime Analog Classics Plus Bundle
With the Realtime Analog Classics Plus plug-in bundle, you not only get legendary compressors such as the Fairchild® 670 and EQs like the Pultec® EQP-1A, but also stunning guitar and bass amp emulations from Softube, and UA’s landmark 610-B Tube Preamp and EQ plug-in.
- UA 610‐B
- Marshall Plexi Classic Amplifier
- Fairchild 670 Legacy
- Teletronix LA‐2A Legacy
- UA 1176LN Legacy
- UA 1176SE Legacy
- Pultec EQP‐1A Legacy
- Pultec Pro Legacy
- Ampeg® SVT-VR Classic Bass Amp
- Precision Channel Strip
- Precision Reflection Engine
- Precision Delay Modulation
- Precision Delay Modulation L
- UA Precision Enhancer Hz
- Raw Distortion
UA 610-B Tube Preamp and EQ
Impart your tracks with the iconic warmth and character of the classic hardware used to track everyone from Duke Ellington to Coldplay. By emulating the entire signal path, including tube amplifiers, transformers, and circuit nonlinearities, the 610-B Tube Preamp and EQ plug-in injects organic detail and saturation to any signal — whether you’re re-amping or tracking through the 610-B via Universal Audio’s Unison™ technology.
Marshall® Plexi Classic Amplifier
The undisputed alpha dog of rock and roll guitar amps, the Marshall “plexi” amplifier is as legendary as the music it helped create. From Jimi Hendrix to Jimmy Page, Duane Allman to Eric Clapton, the Plexi’s punishing melange of snarl, sustain, smoothness, and raunch defined the sound of rock. Developed by Softube, the Marshall Plexi Classic Amp plug-in gives you the sound of this iconic amp with a perfectly placed microphone from engineer Tony Platt who recorded AC/DC’s Back in Black and Highway to Hell.
Fairchild® 670 (Legacy)
The world’s most coveted compressor, the classic Fairchild 670 tube limiter will give your tracks and mixes unmistakable tube warmth and character. Whether you’re looking for subtle compression on a lead vocal, or grittier textures that can work on guitars, bass, or a drum bus, the Fairchild 670 plug-in adds a classic “glow” to anything you run through it.
Teletronix® LA-2A Classic Leveling Amplifier (Legacy)
With its gentle, program dependent optical compression and meticulously designed tube amplifier, the LA-2A is the go-to compressor for professional mixers around the world — especially for vocals. Incredibly easy-to-use Peak Reduction and Gain controls gives you the ideal optical compression sound for guitar, bass, drums, and more.
1176SE/LN® Classic Limiting Amplifiers (Legacy)
Get classic, ultra-fast FET compression from the world’s most recognized compressor. The 1176 will impart punch, presence, and character as well as its signature distortion overtones on drums, vocals, guitars, and bass. The 1176LN has graced countless recordings, from Led Zeppelin, to the White Stripes and Michael Jackson.
Pultec® Pro Equalizers (Legacy)
Mix with two of the most sought-after hardware EQs ever made — the MEQ-5 Midrange Equalizer and the EQP-1A Program Equalizer. Both of these tube-based icons deliver smooth and silky EQ curves with an abundance of warm analog character.
Ampeg® SVT-VR Classic Bass Amp
Introduced in 1969, the Ampeg SVT bass amp is still the reigning king of high-powered tube bass tone. Developed by Brainworx, the Ampeg SVT-VR Classic Bass Amp plug-in perfectly captures the raw power and punch that has made this the go-to amp for rock, funk, and soul players. Track in real time using Unison™ preamp technology for the tone, touch, and feel of a real SVT bass amp, or transform bland DI tracks with the thunderous roar of a stone cold classic.
Precision Mix Rack Collection
Featuring the Precision Channel Strip, Precision Reflection Engine, and Precision Delay Modulation plug-ins, the Precision Mix Rack Collection offers four modern, high-fidelity plug-ins for recording and mixing. Powerful and intuitive, Precision Mix Rack Collection gives you an impressive tool set — perfect for beginners and seasoned professionals alike.
UA Precision Enhancer Hz
Expertly dial-in your music’s low-end frequencies with the Precision Enhancer Hz plug-in. Able to yield exacting results with minimal adjustment, the Precision Enhancer Hz can add weight to kick drum samples, fatten up a synth bass, or simply make the low-end of your tracks more audible on smaller speakers.
Modeled from a vintage early-’80s Pro Co Rat, Raw Distortion delivers all the gritty dynamic raunch of the legendary stompbox. And with Unison™ technology, you can plug in to Apollo Twin, 8, or 8p’s front-panel Hi-Z instrument jack and experience the same circuit interaction, gain range, and clip points for the true tone, feel, and response of the original hardware.
RealVerb Pro is a flexible, natural sounding reverb based on UA’s own unique set of algorithms. Allowing you to design the room just as you hear it, the RealVerb Pro goes beyond simply big/small or dark/bright, giving your sources distortion-free, smoothing diffusion control and ultra-long reverb tail.
Apollo x8p Features & Specs
- 16 x 22 Thunderbolt 3 audio interface with class-leading 24-bit/192 KHz conversion (backwards compatible with Thunderbolt 1 & 2 on Mac)
- Realtime UAD HEXA Core Processing for tracking through UAD plug-ins at near-zero latency, regardless of audio buffer size
- 8 Unison-enabled mic preamps with realtime preamp emulations from Neve, API, SSL, Manley, Universal Audio, and more†
- Surround monitor controller up to 7.1 format
- Includes the "Realtime Analog Classics Plus" UAD plug-in bundle. Other UAD plug-ins sold separately.
- UAD HEXA Core processing onboard for additional mixing horsepower for Pro Tools, Logic, Cubase, Ableton, and other major DAWs
- Combine up to 4 Thunderbolt-equipped Apollos and 6 total UAD devices
- Selectable +24 dBu operation for easy compatibility with professional mixing consoles and tape machines
- Convenient front panel monitoring functions including Alt Speakers, Talkback mic, and assignable Dim or Mono
- Free, industry-leading technical support — on the phone and online — from knowledgeable audio engineers
Inputs Combo Mic/Line Inputs 8 Balanced XLR/TRS DB25 Line Inputs 8 Balanced via 25-pin D-sub Instrument (Hi-Z) Inputs 2 Unbalanced ¼" TS Digital Inputs (Optical TOSLINK) ADAT: 8 channels @ 44.1 – 96 kHz
ADAT: 4 channels @ 176.4 – 192 kHz
S/PDIF: 2 channels @ 44.1 to 96 kHz
(Switchable ADAT or S/PDIF)
A to D Conversion Mic Preamps Dynamic Range: 122 dB (A-weighted)
THD+N: -115 dB (0.00019%)
Frequency Response: 20 Hz – 20 kHz, ±0.05 dB
Line Inputs Dynamic Range: 123 dB (A-weighted)
THD+N: -113 dB (0.00022%)
Frequency Response: 20 Hz – 20 kHz, ±0.04 dB
Outputs DB25 Line Outputs 8 Balanced via 25-pin D-sub Monitor Outputs 2 Balanced ¼" TRS Headphone Outputs 2 Stereo ¼" TRS Digital Outputs (Optical TOSLINK) ADAT: 8 channels @ 44.1 – 96 kHz
ADAT: 4 channels @ 176.4 – 192 kHz
S/PDIF: 2 channels @ 44.1 to 96 kHz
(Switchable ADAT or S/PDIF)
D to A Conversion Line Outputs Dynamic Range: 127 dB (A-weighted)
THD+N: -118 dB (0.00011%)
Frequency Response: 20 Hz – 20 kHz, ±0.07 dB
Monitor Outputs Dynamic Range: 129 dB (A-weighted)
THD+N: -118 dB (0.00012%)
Frequency Response: 20 Hz – 20 kHz, ±0.06 dB
Headphone Outputs Dynamic Range: 125 dB (A-weighted)
THD+N: -102 dB (0.00080%)
Frequency Response: 20 Hz – 20 kHz, ±0.05 dB
Apollo X Series System Requirements
- Thunderbolt 3 cable (not included)
- Internet connection to download software and authorize UAD plug-ins
- 6 gigabytes available storage
- Quad Core i7 or better processor recommended
- For additional compatibility information, visit help.uaudio.com
- Available Thunderbolt 1, 2, or 3 port
- Thunderbolt 1 and 2 connections require an Apple Thunderbolt 3 to Thunderbolt 2 Adapter (not included)
- macOS 10.12 Sierra, 10.13 High Sierra, or 10.14 Mojave
- Available Thunderbolt 3 port
- Windows 10 (64-Bit Edition)
Zium zium urrrrrrr, fastest of them all, reminds me of old days in the studio, love it more and more everyday, keep that boppin UA
Excellent piece of kit
Sounds great. Worth shelling out for. Preamps sound fantastic. Included plugin bundle (analogue classics) could do with a bit of a refresh, but it's a freebie so I can't complain.
I was always a bit sceptical about UAD! never bought one and always worked with native plugins. My old interface stopped working and had to buy a new one with enough inputs and mic pre amps so I'm able to do my work. I ended up buying a Apollo X8P.
As an EDM producer this card looks like a bit overkill for what I normally do, but I also do Movie, Tv and Game Scoring and have a lot outboard gear that I use with it! The converters on this interface are amazing! The unison on the mic inputs well... just try them.. you'll be blown away! also the plugins sound very rich and deep! I'm totally hooked on UAD products and will end up buying more plugins and maybe accelerators!
If you ever need a new interface my advice is to have a good look into your budget and also try to find out what you expect from an interface! if you have enough money buy an apollo not only for the DSP plugins but also for the converters!
Insanely easy to use, lovely sound!
I'm a recording aficionado on the process of turning to the pro side with a medium sized project studio. For this reason I decided to give a try to the new X series Apollo interfaces, choosing the x8p as a great way to use the included 8 Unison preamps but also scalable to get external analog pres in as well. I'm using a Thundebrolt 2 to Thundebrolt 3 converter to connect into my computer and haven't had any problems whatsoever. Used the interface to record guitars and drums so far with amazing quality and impressive ease of use on any DAW (Cubase and Pro Tools have been used)
Tested out the Neve 1073 plugin to record guitars and I'm very very happy with the results. Very close quality to the "real gear" but very easy to use, removing any routing, cabling or mic setup. It's insane how good these Unison preamp work. Very Very happy with the nes stuff, I will build the studio based around this interfaces.
Sounds clean and transparent. I never imagined the Unison preamps would be so effective. Now I just recall presets to load either the Neve or SSL channel strips to every input before tracking.
I was recording with an korg multitrack before i bought an apollo x8p.
The difference is night and day.
The clarity, the 'open' sound of the unit it self...
I like the customer service that comes along if a problem occurs.
Amazing sounding preamps and plugins!
Best sounding mixes we've ever had
Unison pres are awesome, workflow is stress-free, TalkBack mics are very convenient. I want to add another x8p to the rig!
Wow, just wow.
This thing is so versatile and excellent! I've worked with the Twin mkI and with the Antelope Orion32+ which are both awesome units, but the Apollo x8p is something else entirely! The detail in the sound is amazing, and the connections, routing and software are excellent. I'm a great fan of the Unison preamps and recording or monitoring through quality plugins is great. I've had many different setups in my studio, but the best thing about these Apollos (I've got multiple units linked) is that I've got everything in one place and it instantly works like a charm. Well done UA!
Best Audio Product Ever Made
I've owned a ton of gear over the past 40 years and once owned a recording studio. I've had a Lexicon 480L, TC 6000, Tube Tech, Urei, LA2A, Neve, SSL, Empirical Labs and much more. After using the Apollo x8p for about a week now I'm glad I sold everything.
The x8p is one of the best sounding products I've ever used. When I dial up a setting on the Lexicon 480L insert it feels like the real thing. All the great reverbs I remember from the past sounding as great as ever. Same with the Neve pre.
All of the vintage style emulations I've tested so far are incredible. The SSL 4000 channel strip presets are wonderful. It's clear that a great deal of time and effort went into capturing the feel of the old gear and for some reason the plug-ins have much more presence than I'm used to in Pro Tools or other DAW's I've worked with in the past. I also really like the simplicity with which the console allows you to record with UAD inserts.
The cue mix flexibility is great too and it's nice having two independently addressable headphone outputs on the front.
It's clear to me that a great deal of thought and engineering went into this product. I added an Arrow for portable use and plan to add another x8p in the future. I like how seamless it is to expand.
This is a real winner and the UAD concept is outstanding.
I really enjoy all the new gear from UA.
So much power!
Loving how much this thing handle! And finally I can do my 5.1. gigs with UAD!
Nothing Better than the x8p
As a music production teacher, I want my students using the best equipment available for our school budget. The Apollo x8p has been an amazing upgrade in our studio. The students are loving the Unison technology and getting a glimpse of using analog-style gear through Unison. The x8p is built like a tank and using console has been awesome!
Best I/O option money can buy
Absolutely top of the line. We’re producing billboard charting records front to back with UAD Apollo gear.
J. van de Ven
Great unison pre’s
In addition to my 500 series racks with API and Neve pre’s the unison pre’s give me extra colors. So easy and fun.
The best way to add I/O
I have enough gear that I have been re patching my mixer and debating whether or not to buy a console sized mixer. I don’t have the space for that and I have an Apollo 8 duo. I initially thought I had to upgrade all my gear to expand my setup, but when I realized that x series was backwards compatible I ordered the 8p. I now have 12 dsp cores which feels like plenty for a mix in most cases. I will say that logic integration is not perfect and when I added the second interface the logic metronome bleeds into my recordings. I’m sure it just means I need to re map the I/o in logic. That said I feel like I can make amazing recordings that would have been pipe dreams when I started in the late 90s. Now if I can work out a time machine to bring this tech to my creativity back then...
Best upgrade yet!
Having the Apollo 8p and Twin, it was a no brainer to move my home studio up a notch with more I/O and pristine recordings. Even with these old ears, the difference is noticeable. More 'pro' sounding for sure. A few things on my wish list that I'm sure UA will take care of in the near future! Very satisfied though.
Perfect expansion for me
I already had an Apollo x8 that I use along with a Neve 5024 on the four line inputs. I wanted 8 more channels, so the x8p was perfect. It was easy to set up with my existing gear, so I was back in business quickly with the 16 channels I need for an upcoming project.
The only thing I would like better would be if they offered buyers who already have a UA unit a choice of some different freebie plugins when purchasing a second unit. I like the UA plugins and would have dug even a couple more with the new interface. The ones offered were the same as what I got with my x8.
I come from the world of audio production and post production audio. I was using before my Universal Audio Apollo x8p an Avid Fast Track Duo, which now serves as a portable interface. The differences are huge. For one, I noticed much clearer sound, which I can only attribute to the UAD-2 processing that is in the x8p. Not to mention that each sample rate has its own dedicated crystals! Its just a beautiful piece of kit; very good at handling surround mixes. The pre-amp in this interface is incredible! Also love using the plugins that came with this interface. Absolutely a fan of the Pultec Pro Legacy plugin, the 1176 SE, and the Fairchild 670 Legacy models. Overall score: 10/10
I believe its the best !
I have upgraded from focusrite clarett 8prex and i saw huge difference! Of course its almost 3 times more expensive but it worths every penny! The plug ins that were given free is fantastic. Though i believe the the plugin library is a little expensive! Nevertheless, i will surely buy more plugins. The unison pre amps i believe its the best arsenal of this unit. Thanks
Stunning, powerful, and slightly challenging to integrate
First of all, what an amazing piece of gear, and all of the hype about the sonics is real. The expanded monitoring capabilities for headphone mixes is awesome, and overall, I’m a super happy camper.
That said, I had a time integrating this unit into my ecosystem.
For background: I already own an 8p, a twin duo, and two satellites - running on a 2012 model Mac Mini and a 2015 model MacBook Pro. I just hit a spot where I needed the additional inputs for my studio, and found that the 8p that would have matched my existing one had just been taken off the market. I thought that it would be cool to get into the x series of Apollos, but was worried about integrating, since everything I own is thunderbolt 2, but after assurances from my Sweetwater rep and researching the UAD website, I felt safe.
Well... it turns out that the 8xp wouldn’t talk to my computer with the aftermarket thunderbolt 2 to 3 adapter Sweetwater told me I had to have, so on a Sunday afternoon with a major client arriving in the morning, I ran to the nearest Apple store (a mere hour away) to buy the Apple thunderbolt 2 to 3 adapters.
After returning back to my studio, the Apple adapter allowed my computer to talk to the 8xp, but not the rest of my Apollo system.
Eventually I learned this: I have to use the Apple adapter on the way in, and the aftermarket adapter from Startec on the way out, and it all talks!
I guess all’s well that ends well, but I could have done without the panic and sweat and uncertainty.