Universal Audio Apollo x8p — Eight Unison Preamps and a Console's Worth of DSP
The x8p is the interface UA built for people who want a real analog-console-modeling front end, not just clean conversion. We spent three weeks tracking a full band through its eight Unison preamps to see if the DSP-powered emulation holds up under real sessions.
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The Apollo x8p Gen 2 sits near the top of UA's desktop Apollo X line — 16 inputs and 22 outputs, built around eight Unison-enabled mic preamps that don't just add gain, they electrically reconfigure themselves to match the impedance and gain-staging behavior of classic preamps (Neve, API, Manley, and others) when paired with the corresponding UAD plugin.
Six DSP cores ("HEXA Core") power real-time UAD plugin processing on the way in — tracking through a modeled 1176 compressor or a Neve preamp emulation with genuinely zero added latency, rather than committing to the sound in the box or monitoring dry until mixdown.
Sound
Clean, unprocessed conversion through the x8p is transparent and detailed — Apollo X Gen 2 converters spec at 129dB dynamic range, which is audibly quiet even on sensitive ribbon mics and high-gain sources. This is the foundation the Unison preamps and DSP effects sit on top of, and it doesn't color anything on its own.
The Unison preamps are where the x8p differentiates itself from every non-UA interface in this comparison: loading a Neve 1073 or API preamp emulation genuinely changes the input impedance and gain response the physical preamp presents to the mic, not just an EQ curve applied after the fact — the difference is audible, especially on ribbon mics that behave differently depending on the load impedance they see.
"Loading a Neve 1073 emulation genuinely changes the input impedance and gain response the physical preamp presents to the mic — the difference is audible."
— Siddharth Mitra, Senior Gear ReviewerRunning UAD plugins in real time while tracking (compression, EQ, amp sims) at effectively zero latency is the other headline feature, and in practice it holds up — a full band tracking through modeled 1176s and Neve preamps monitored with no perceptible delay across a full three-week session.
Build & Comfort
The x8p's chassis is full metal, rack-mountable, with a large output-level knob and metering on the front panel. Thunderbolt 3 connectivity keeps latency low and bandwidth high enough for the full channel count at high sample rates without dropouts across the testing period.
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How It Compares
Full Specifications
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The x8p's price only makes sense if the Unison preamp modeling and real-time DSP effects are things a workflow will actually use — as a plain, high-channel-count clean interface, cheaper options in this comparison get most of the way there. But for anyone who wants console-preamp character while tracking rather than fixing it in the mix afterward, nothing else here offers the same combination of channel count, preamp modeling, and zero-latency effects processing.