Nov 12, 2026 · Gear comparison · 10 min read

Apollo Twin X vs RME Babyface Pro FS: Which Should You Buy?

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They cost the same $999 and they both sit on producers’ desks, but they are built on opposite ideas. The Apollo Twin X puts DSP inside the box so you can record and monitor through classic-hardware plugins. The RME Babyface Pro FS puts its effort into drivers, routing and flexibility. Here is which one fits how you work.

How this comparison was made: I produce and mix with an Apollo Twin X, next to my MPC Live III and Dynaudio LYD 48 monitors, so that side comes from daily use. I have not owned a Babyface Pro FS. Every spec on both sides comes from the official hardware manuals (Apollo Twin X Gen 2, pages 30–32; Babyface Pro FS, chapters 27 and 28), cross-checked with Sound On Sound and the retailers credited at the end. Prices were checked at B&H on November 12, 2026.

Apollo Twin X vs Babyface Pro FS: side by side

*Apollo Monitor Correction needs Sonarworks SoundID Reference software and a measurement mic. Dynamic range figures are each maker’s own measurements with different methods, so compare them as a rough guide, not to the decibel.

What they have in common

On paper they look alike: two mic preamps with phantom power that reach +65 dB of gain, an instrument input, an optical input for eight more channels from an ADAT preamp, 24-bit recording up to 192 kHz and a desktop mixer app that gives you near-zero-latency monitoring. Both are small enough to live next to a laptop and a drum machine. Both are serious, pro-level interfaces: at this price there is no bad choice, only one that fits your setup better.

The differences are in what each company decided to spend your $999 on.

Apollo Twin X: record and mix through classic gear

The Apollo’s reason to exist is UAD DSP. The DUO version has two SHARC chips and the QUAD has four. They run UAD plugins inside the interface, so you can track a vocal or a synth through an 1176 or LA-2A and hear the result while you play, without loading your computer. The two Unison preamps go further: load a Neve, API or SSL preamp plugin and the hardware changes its impedance and gain behavior to match. UA’s manual quotes 1.1 ms of analog round-trip latency at 96 kHz, even with four plugins running in UAD Console.

The Gen 2 version, launched in October 2024, added better converters (UA quotes 129 dB of dynamic range on the monitor outputs and −120 dB THD+N), Auto-Gain for the Unison preamps, a built-in talkback mic and support for Apollo Monitor Correction by Sonarworks, which corrects your speakers and headphones from inside the interface. Sound On Sound called the Sonarworks integration probably the deepest it had seen, and its main complaints were small: no Thunderbolt cable in the box and an Auto-Gain that is not fully foolproof.

The limits are just as clear. It needs Thunderbolt and an external power supply, it has no MIDI, the optical port is input only, and although there are mic and line jacks on the back, it records two analog channels at a time. Its single headphone output gives 69 mW into 300 Ω; Sound On Sound noted that a session drummer wanted more volume.

On my desk it is the interface I produce and mix through, with the MPC Live III and the LYD 48 monitors. I am not a vocalist and I do not record vocals with it, so the vocal-tracking points here come from UA’s documentation and the reviews credited below, not from my sessions.

Pick it if: you want UAD plugins and Unison preamps while you record, you mix on speakers and want monitor control in one box, and two inputs at a time is enough.

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Everything you need to know about Apollo X Gen 2 · Universal Audio

RME Babyface Pro FS: the flexible workhorse

RME’s reputation rests on drivers that stay stable and low-latency year after year, and on TotalMix FX, a 288-channel hardware mixer that can send any input to any output with its own EQ, low cut, reverb and echo. In May 2026 RME released TotalMix FX 2.0 for all its interfaces, with a scalable interface, undo and redo, and a light theme (Sound On Sound). Version 1.991 stays available for older computers.

The FS version, from late 2019, brought RME’s SteadyClock FS clock and new converters with very little delay: 5 samples on the way in and 7 on the way out, about 0.12 ms combined at 96 kHz. On the hardware side it gives you more to plug in: four analog inputs you can record at once (two XLR mic/line, two ¼" line or instrument), balanced XLR outputs, two headphone jacks (one for high-impedance and one for low-impedance headphones, sharing the same mix), ADAT in and out and a MIDI in and out.

It also travels better. It weighs 680 g, runs on USB bus power, works class compliant with an iPad and even runs without a computer as a stand-alone preamp and converter. What it does not have is plugins: TotalMix FX effects help you monitor comfortably, but they will not make a vocal sound like it went through vintage hardware. Its published output specs (118 dBA) are lower than the Gen 2 Apollo’s, though both are far quieter than any home room.

Pick it if: you record more than two sources at once, need MIDI, work on Windows or an iPad without Thunderbolt, move between studios or want the most routing for the money.

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RME Babyface Pro FS: quick start and full walkthrough · RME USA (Synthax)

Latency: which is faster?

For monitoring while you record, both feel instant. The Apollo’s published 1.1 ms round trip at 96 kHz includes running UAD plugins in the path. The Babyface’s converters add about 0.12 ms at 96 kHz, and TotalMix adds about 3 samples, but it has no plugins in that path, so the numbers are not measuring the same thing. When you monitor through plugins in your DAW instead, latency depends on the buffer size and your computer more than on the box. Sound On Sound found the Apollo’s Thunderbolt low-latency performance good, and RME’s USB drivers are the reason many engineers buy it.

Which is better for hip hop producers?

• Beatmaking with an MPC or sampler: the Babyface Pro FS, by a little. You can record the MPC’s stereo out into the line inputs and still have both mic inputs free. On the Apollo the MPC takes both analog channels. If the MPC is your only source, either works, and a Live III can also stream audio over USB.
• Mixing beats on speakers: the Apollo Twin X. The quieter monitor path, monitor controls and Sonarworks correction are made for this.
• Recording rap vocals: the Apollo if you want to track through a preamp and compressor model and hear a finished-sounding vocal; the Babyface if you prefer a clean signal and doing everything in the mix. See how to record rap vocals at home.
• Sampling vinyl: both work through a phono preamp or DJ mixer into the line inputs. Neither has a phono input. Read how to sample vinyl.
• Laptop on the go: the Babyface Pro FS. USB bus power, 680 g and no Thunderbolt requirement.

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Universal Audio Apollo Twin X vs RME Babyface Pro FS: pros and cons · Butler Makes

Apollo Twin X vs Apollo Solo

The Apollo Solo is the cheaper way into the same UAD workflow: two Unison preamps, one SOLO DSP chip, 2 inputs and 4 outputs, and USB bus power on the Thunderbolt version. It was about $595 (USB) to $690 (Thunderbolt) at B&H on November 12, 2026. The Twin X adds the Gen 2 converters, two or four DSP chips (so more plugins at once), line outputs 3–4, an optical input for eight more channels and the talkback mic. If you will mostly mix and only track one or two things through plugins, the Solo covers a lot of it.

Apollo Twin X vs Scarlett 2i2

The Focusrite Scarlett 2i2 4th Gen ($224.99 at B&H on November 12, 2026) also records two channels at once and has more preamp gain on paper (69 dB), Auto Gain and Clip Safe. What it lacks is everything the Apollo’s extra money buys: DSP plugins, Unison preamps, an optical input, extra line outputs and monitor controls. For a first interface, the 2i2 is the sensible buy. Move to an Apollo or a Babyface when you know exactly which of those features you will use.

Comparing more options, from $139 up? Read our guide to the best audio interface for recording vocals at home. Choosing speakers to go with it? See the best studio monitors for a home studio and the best headphones for music production. Then put it to work in how to mix boom bap drums.

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TotalMix FX 2.0 update walkthrough and overview · RME Audio

Verdict

If you want your interface to be part of your sound, get the Apollo Twin X. Recording and monitoring through UAD plugins and Unison preamps, with a quiet monitor path and monitor controls for mixing, is something the Babyface cannot do. It is the interface I make beats and mix through, and for a producer working at one desk with a Thunderbolt computer it is a great fit.

If you want your interface to stay out of the way and adapt to anything, get the RME Babyface Pro FS. Four inputs at once, MIDI, ADAT out, bus power, iPad and stand-alone use, and drivers known for stability make it the better tool for multi-source sessions, travel and setups without Thunderbolt.

Next step Put the gear to work: how to make boom bap beats on an MPC →