Schiit Mani 2 vs iFi ZEN Phono 3

These two turn up on the same shortlist constantly, at roughly the same money, and the usual comparison is a paragraph about house sound. Both makers publish real specifications instead, so this page is a reading of those sheets — gain, loading, noise, distortion, filter, power — and nothing else. We have not listened to either one, and we are not going to tell you which sounds warmer.

Gain: four steps each, 12 dB apart at the top

Schiit publishes 33, 42, 48 and 60 dB, with 42 dB as the factory default. iFi publishes 36 dB for moving magnet and 48, 60 and 72 dB for its three moving-coil positions. At the bottom the Schiit goes 3 dB lower, which is useful for a hot cartridge into a sensitive input; at the top the iFi goes 12 dB higher, which is the headline difference between the two boxes.

Loading: the gap that decides most purchases

A cartridge is loaded by the resistance and capacitance the phono stage presents, and some cartridge makers state what they want. Audio-Technica specifies “min. 100 Ω” for the AT-OC9XML moving coil, in its own words. Grado specifies a 10 kΩ to 47 kΩ input load for the Green4. Ortofon asks for 47 kΩ with 150–300 pF for the 2M Red.

Schiit publishes four resistive loading options — 47 kΩ, 200 Ω, 47 Ω and 38 Ω — and four capacitance settings: 47, 100, 150 and 200 pF. iFi publishes no resistive loading at all, only 100/200 pF for its MM and MC High positions. That is not a small difference in a spec table; it is the difference between being able to meet a cartridge maker’s stated requirement and having to hope. With the Mani 2 an AT-OC9XML can sit on the 200 Ω setting, comfortably above its stated 100 Ω minimum. With the ZEN Phono 3 there is no published figure to check it against.

The Mani 2 also supports moving iron explicitly — Schiit lists MM, MC and MI — and iFi lists MM and MC only. If your cartridge is a Grado, that is worth knowing; our guide to swapping cartridges covers why moving iron sits awkwardly between the two camps.

One piece of perspective before the numbers get finer: both of these boxes publish per-setting noise and distortion and at least some loading data, which is more than the phono stage built into any tube or hybrid amplifier we cover manages — not one of those four publishes a single phono figure. Arguing over decibels between two documented stages is a luxury.

Noise and distortion: the Schiit wins every comparable step

Both makers publish A-weighted noise figures, so for once these can be read side by side. Schiit: greater than 108 dB at 33 dB gain, 98 dB at 42 dB, 96 dB at 48 dB and 87 dB at 60 dB, referenced to 2 V RMS. iFi: 91 dB(A) for MM at 36 dB, 81 dB(A) for MC High at 48 dB, 89.6 dB(A) for MC Low at 60 dB and 78.6 dB(A) for MC V-Low at 72 dB.

At the two comparable settings the Schiit is ahead by a wide margin: 96 dB against 81 dB at 48 dB of gain, and 87 dB against 89.6 dB at 60 dB — where iFi does take the round by 2.6 dB. Note the oddity on iFi’s own sheet, which we have not seen explained: MC High at 48 dB is noisier than MC Low at 60 dB, by 8.6 dB. Higher gain, lower published noise. We are not going to invent a mechanism for it, but it is the kind of thing that makes a middle setting hard to recommend.

Distortion goes the same way. Schiit publishes less than 0.0003% at 33 dB and less than 0.0015% at 60 dB — both exceptionally low. iFi publishes less than 0.0027% for MM, less than 0.0095% for MC High and less than 0.031% for MC Low, which at the 60 dB position is roughly twenty times the Schiit’s figure. For the 72 dB V-Low setting iFi publishes no distortion figure at all — so the one capability that makes the ZEN Phono 3 the right answer is also the one setting its maker describes least.

The subsonic filter, and what a published slope is worth

Both have one. Schiit publishes its corner and its slope and makes both switchable: 15 Hz at either 6 or 12 dB per octave, fully passive. iFi calls its circuit an “Intelligent Subsonic Filter” and publishes neither a corner frequency nor a slope.

This matters more than it sounds. A subsonic filter exists to remove warp and rumble energy below the music, and how much of the bottom octave it takes with it depends entirely on where it starts and how steeply it falls. A published 15 Hz at 6 dB per octave is a calculable effect. A named feature is a promise. The only other stage we cover that publishes a slope is the Pro-Ject Tube Box S2, at 20 Hz and 18 dB per octave, which is far more aggressive than either of these.

Power supply and the practical stuff

Schiit uses an external 16 V AC transformer feeding dual-filtered regulated ±16 V rails, published in the manual. iFi uses an external 5 V DC supply at 0.5 A. Higher rails give a circuit more room before it clips, which is consistent with the Schiit’s distortion figures, though neither maker publishes a maximum output level and we are not going to extrapolate one. Practically: the Schiit needs its specific AC wall unit, while the iFi runs from a common 5 V supply.

Neither publishes an RIAA accuracy figure, which is the specification that says whether records come out the right shape and the one we most wish both would state. Among the stages we cover, only Cambridge Audio (± 0.3 dB on the Alva Duo), NAD and Pro-Ject publish it — our $250–$500 roundup ranks on exactly that.

Which one, by what you own

• A moving magnet (AT-VM95E at 4.0 mV, Ortofon 2M Red at 5.5 mV, Nagaoka MP-110): the Mani 2. Lower noise at the gain you will use, four capacitance settings to match the cartridge sheet, and distortion two orders of magnitude lower than iFi publishes for its MM position.
• A Grado or another moving iron cartridge: the Mani 2, because Schiit lists MI support and iFi does not.
• A moving coil at 0.3–0.4 mV (Denon DL-103, AT-OC9XML, AT-OC9XEN): either, and the deciding factor is loading. If your cartridge maker states a load impedance, the Mani 2 can be set to it and the ZEN Phono 3 cannot be verified against it. If it does not, the iFi’s 72 dB position gives you a healthier output level than 60 dB does.
• A cartridge below 0.3 mV: the ZEN Phono 3 by default, accepting its 78.6 dB(A) noise and its unpublished distortion at that setting. Below about 0.2 mV, consider a step-up transformer instead and read our moving magnet versus moving coil explainer first.

One buying note before you click

Schiit sells direct as well as through Amazon, and on the day we last refreshed prices (17 October 2026) our price feed returned a live Amazon price for the ZEN Phono 3 and no Amazon buy-box price at all for the Mani 2 — the listing exists, the buy box did not. That is why the Mani 2 button below says “check price” rather than showing a number: we will not print a figure we cannot verify today. It is a stock condition, not a verdict, and it does not change the specification comparison above.

What we did not compare

Sound. Neither of us has heard these two in the same system on the same cartridge, and the figures above do not entitle anyone to a verdict about it. Also absent from both sheets: RIAA accuracy, maximum output level, overload margin and input impedance for the iFi. Those are the four specs that would settle the remaining questions, and neither maker publishes them. If you want a phono stage that documents its playback curve, that is a different bracket and our under-$200 roundup is where these two sit within their own.