iFi Audio ZEN Phono 3 Phono Preamplifier

A Big Upgrade for iFi's Entry-Level Phono Stage

The iFi Audio ZEN Phono 3 is an MM/MC phono preamplifier and the newest version of iFi's compact ZEN Phono line. It skips straight from the original ZEN Phono to "3." New additions include a subsonic filter, a front-panel gain switch, and a 4.4mm balanced output, none of which the first-generation model had.

It's a different product from the ZEN Air Phono, a separate, simpler model in iFi's lineup that trims back features for a lower price. The ZEN Phono 3 sits above it, with more gain settings and finer loading control.

iFi builds the whole circuit into a compact, half-width aluminum chassis. A clean power supply runs on its own isolated board, keeping electrical noise away from the phono stage.

Four Gain Modes and a Smarter Subsonic Filter

Gain switches across four modes: 36dB for moving magnet, 48dB for moving coil high output, 60dB for moving coil low output, and 72dB for moving coil very low output. Each mode pairs with matching loading options. MM and MC High settings use a fixed 47 kOhms, while MC Low and MC V-Low switch between 1k, 400, or 100 ohms.

Capacitance loading switches between 100pF and 200pF on the MM and MC High modes. Distortion stays below 0.0027% in MM mode, rising to a still-low 0.031% in MC Low mode.

iFi rates the noise floor at -151dBV equivalent input noise. Signal-to-noise ratio reaches as high as 91dB(A) weighted in MM mode. RIAA accuracy is rated within ±0.15dB across the audible range.

The intelligent subsonic filter distinguishes real bass from warp-induced noise. It does this by treating vertical and lateral groove information differently, since musical bass on a record is inherently mono. That lets it filter out rumble from a warped LP without dulling genuine low end.

It measures 158 by 115 by 35mm and weighs 456 grams. Power comes from an included external 5V/0.5A DC adapter.

What Reviewers Are Saying

Ed Selley reviewed the ZEN Phono 3 for AVForums in June 2024, calling it a phono stage that "sounds ridiculous for £250." He found "the performance of the Phono 3 with moving magnet carts is so absurdly good." In his view, many listeners wouldn't need to upgrade to a moving coil cartridge at all.

He also praised its noise performance directly, describing it as "still a supernaturally quiet phono stage" even next to pricier competition.

Chris Kelly reviewed it for The Ear in April 2025. He wrote that "the tiny Zen Phono 3 was punching so far above its weight that if it was an actual fight the referee would have stepped in." He also noted "my ear was greeted with inky black silence" when listening right next to the drive units.

Kelly added that acoustic passages came through "with just the right weight, delicacy and musicality." It was a result he didn't expect from a phono stage at this price.

Who Is This Preamp Best For?

• Anyone starting out with a moving coil cartridge. Three moving coil gain settings cover moderate to very low output types.
• Owners of warped or well-worn records. The subsonic filter removes rumble without stripping out real bass.
• Anyone building a balanced-capable system. A 4.4mm balanced output, unusual at this price, pairs with compatible balanced gear.
• Listeners who want proven, independently reviewed performance. Multiple named reviewers at established publications praised its quiet noise floor and detail.
• Not the right fit for anyone who wants a full-size chassis with a front-panel display. The ZEN Phono 3 is a compact, half-width unit with switch-based controls.

How Does It Connect to Your System?

Run your turntable's phono cable into one of the ZEN Phono 3's two RCA inputs. Connect its RCA output to your amp, or use the 4.4mm balanced output if your gear supports it.

Set the front-panel gain switch to match your cartridge type. Then dial in loading and capacitance from the rear panel. Engage the subsonic filter if your records or turntable need help with warp-induced rumble.

Pairs Well With

Building your system? Here are some great companions for the iFi Audio ZEN Phono 3:

• Turntables without a built-in phono stage
• Moving coil phono cartridges matched to its four gain modes
• Interconnect cables to connect its output to your amp

Frequently Asked Questions

How is this different from the original ZEN Phono?

The ZEN Phono 3 adds a subsonic filter, a gain switch, and a 4.4mm balanced output, none of which appeared on the original model. iFi also refined the circuitry for a quieter noise floor.

How is this different from the ZEN Air Phono?

The ZEN Air Phono is a separate, more affordable model with a simpler feature set. The ZEN Phono 3 offers more gain modes, finer loading adjustment, and the balanced output.

Do I need a separate step-up transformer for a moving coil cartridge?

No. Gain up to 72dB and loading down to 100 ohms are built in, covering most moving coil cartridges without an outboard box.

What's the warranty?

iFi covers the ZEN Phono 3 for one year in the US, or two years within the EU.

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Learn More

Want to learn more about matching a phono preamp to your cartridge, balanced connections, or getting the most from your vinyl collection? Visit our Learning Center for guides, tips, and expert advice.