The Focusrite Scarlett 2i2 (4th Gen) is the right interface for most home studios: 69 dB of published mic gain is the most at its price and enough for any microphone on this site, and 120 dB dynamic range means the converters are not the limit. The MOTU M2 is the pick if conversion and metering matter more to you than gain headroom.
We rank interfaces by gain first, which is unusual. The reason is that gain is the only specification in this category where the difference between products is large enough to hear in an ordinary home studio. Everything from the cheapest box to the most expensive has converters that outperform the room they are used in; not everything has enough gain for a -59 dBV/Pa microphone.
The seven interfaces, ranked
Each card carries the published specs with a source for every figure, and states plainly which microphones the box can and cannot drive.
Focusrite Scarlett 2i2 (4th Gen)
Top pickFocusrite · The most gain per dollar in a two-input box
The default answer for someone buying an SM7B or PodMic: it supplies enough clean gain that you never need a booster, which makes it the cheaper total purchase even when it is not the cheaper box. Look elsewhere only if you need MIDI or four outputs.
Why it is here
- 69 dB is the most gain of any interface at this price, and enough for an SM7B with headroom to spare
- 120 dB dynamic range means the converters are not the weak link
- Two inputs, so a second person does not mean a second purchase
What it costs you
- Air mode is a fixed voicing, not an EQ you can dial
- Plastic-and-metal build feels less solid than the SSL or Audient competition
- No MIDI, which matters if you also play keys
MOTU M2
MOTU · The best converters and metering at the price
The pick if you care most about conversion quality and want to see your levels without alt-tabbing. If your mic is an SM7B and you want a published gain number you can check against the mic's sensitivity, the 2i2 is the safer buy.
Why it is here
- -129 dB EIN is genuinely quiet, and it shows on low-output dynamics
- Full-color LCD metering on the box is more useful day to day than any software mixer
- Independent phantom power and monitor switching per input
What it costs you
- MOTU does not publish a maximum mic-gain figure the way Focusrite does, so gain headroom is harder to plan around
- No onboard voicing or DSP at all
- Loopback needs the software, not a front-panel switch
SSL 2+ MKII
Solid State Logic · Two headphone outs and a console voicing
Buy it for the second headphone output if you record with anyone else in the room — that single feature is worth the premium. For solo work the 2i2 gives you more gain for less money.
Why it is here
- 64 dB of gain clears an SM7B without a booster
- Two independent headphone outputs is the feature that makes a two-person recording workable
- The 4K switch is a real, usable top-end lift rather than a marketing mode
What it costs you
- Costs meaningfully more than a 2i2 for 5 dB less gain
- Four outputs are wasted if you only own one pair of monitors
- Larger footprint than the rest of this group
Audient iD4 MKII
Audient · The best-sounding single preamp here
The right box if your mic is a condenser or a hot dynamic and you want the cleanest single channel at this price. If you are buying an SM7B, 58 dB puts you straight back into booster territory.
Why it is here
- -129 dB(A) EIN and 0.0017% THD+N are numbers you would expect a tier up
- The Class A preamp is the same circuit family as Audient's consoles
- Two headphone outputs on a one-input box, which is unusual and useful
What it costs you
- 58 dB is not enough for an SM7B without a booster
- One mic input only
- No onboard DSP or voicing
Audient EVO 4
Audient · Anyone who keeps getting gain-staging wrong
The pick for a second host on a budget, or for anyone whose recordings keep coming back too quiet. Not the pick if your mic is an SM7B, where the gain ceiling forces a booster.
Why it is here
- Smartgain removes the single most common beginner mistake in one button
- Two mic preamps at the price of most one-input boxes
- Genuinely small and bus-powered
What it costs you
- 58 dB again falls short of an SM7B's appetite
- Single encoder for everything means more button-pressing than knob-turning
- Plastic build
Universal Audio Volt 2
Universal Audio · A hardware color option on the way in
Buy it if you want character on the way in and your mic is a condenser or a hot dynamic. With a low-output broadcast dynamic, 55 dB means a booster, and that changes the price comparison entirely.
Why it is here
- Vintage mode is a real analog-style color, not a plug-in you could add later
- Two combo inputs and a clean, legible front panel
- The UA software bundle is worth actual money
What it costs you
- 55 dB is the lowest gain ceiling in this group and the least SM7B-friendly
- 112 dB dynamic range trails the Focusrite and MOTU converters
- Vintage mode is a commitment printed into the recording
Behringer U-Phoria UMC204HD
Behringer · The floor of the category, honestly described
Buy it when the alternative is not recording at all, and plan to replace it. With no published gain figure it is a gamble with any low-output dynamic — pair it with a hot mic or not at all.
Why it is here
- Cheapest two-input interface worth plugging a real mic into
- Two combo inputs and phantom power at a price nothing else matches
- Inserts on the inputs, which is unusual this low
What it costs you
- Behringer does not publish a maximum gain figure, so you cannot plan a gain budget from the spec sheet
- Driver experience is the weakest in this group
- Build reflects the price
What we did not pick, and why
- Interfaces above this price band. They are better, and almost none of the improvement is audible in an untreated home room. The money belongs in acoustic treatment until the room is no longer the limiting factor.
- Interfaces with onboard compression on the analog path. Processing you cannot undo is a decision printed into the file. Do it in the DAW.
- Rackmount interfaces. More I/O than a home studio needs, and a form factor that assumes a rack you do not have.
- Anything without published specifications at all. The whole ranking depends on citable figures. If a manufacturer publishes nothing verifiable, we cannot rank it honestly and we will not guess.
- Podcast consoles. They are a different category, not a better interface. RodeCaster Pro II vs Zoom PodTrak P4 covers when that is the right purchase instead.
Pair it with
- A microphone the box can actually drive. Best XLR microphones for podcasting lists sensitivity for every pick.
- A booster, if the pairing is marginal. Best preamps for the SM7B — cheaper than a new interface if you already own one.
- Headphones the output can drive. A 300 ohm open-back needs real voltage swing; see best headphones for mixing.
- Monitors, via the balanced outputs. Best studio monitors under $500.
How to choose
- Start from the microphone. A low-output dynamic means you need 60 dB or more. A condenser means gain is a non-issue and you can choose on features.
- Count the people. One voice needs one preamp. Two voices need two preamps and — the part everyone forgets — two headphone outputs.
- Count the instruments. A guitar needs a Hi-Z input; keys need MIDI, which only the MiniFuse 2 here has.
- Then, and only then, compare converters. At this price the differences are real but small, and they are the last thing that will limit your recordings.
