The SSL 2+ MKII is the best interface for recording vocals: 64 dB of gain clears any microphone on this site, the Legacy 4K switch is a genuinely useful top-end lift on a voice, and two independent headphone outputs mean a vocalist and whoever is producing them can both hear properly — which nothing else at this price offers.
This page ranks differently from best interfaces for a home studio, which is the general answer across every job. A vocal take has two specific properties that change the ranking: it is usually the quietest thing you will record, and it is usually the thing you compress hardest. Both amplify preamp noise, so gain and EIN together decide the result rather than gain alone.
Gain gets you there; EIN decides what arrives with you
Every preamp gets noisier as you turn it up, because its own noise floor is amplified along with your voice. Two boxes with identical maximum gain can sound very different at that setting. The published figure for this is EIN — equivalent input noise — and more negative is quieter.
The Wave XLR has the best raw numbers on that table — 75 dB of gain and -130 dBV EIN — and it is not the top pick, because it has one microphone input, no line inputs and software-bound mixing. For a solo vocal chain it is excellent; as the interface you build a studio around it is a dead end. That trade is worth being explicit about.
The six interfaces, ranked for vocals
SSL 2+ MKII
Top pickSolid 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
Focusrite Scarlett 2i2 (4th Gen)
Focusrite · 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
Audient iD14 MKII
Audient · The quietest two-channel preamp pair here
The best-sounding two-channel box in this price band, and the right buy if your microphones are condensers or hot dynamics. With a low-output broadcast dynamic the gain ceiling still forces a booster.
Why it is here
- Two of the same Class-A console preamps as the iD4, at `-129 dB(A)` EIN
- ADAT input means it grows to ten inputs without replacing the box
- JFET instrument input that takes being driven hard
What it costs you
- 58 dB is marginal for an SM7B, exactly as on the iD4
- No MIDI, which at this price is a real omission
- ADAT expansion needs a separate preamp unit you do not own yet
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
Universal Audio Volt 276
Universal Audio · Analog compression on the way in
Worth it if you record your own voice, know you want compression on the way in, and your microphone is hot enough for 55 dB. For anything else, record clean and compress in the DAW where you can change your mind.
Why it is here
- A real analog compressor on the input, which no other interface at this price includes
- Vintage preamp mode plus MIDI I/O in a bus-powered box
- The three compressor presets are genuinely usable rather than decorative
What it costs you
- `55 dB` of gain is the lowest of the interfaces we recommend and rules out an SM7B without a booster
- Analog compression is printed into the recording and cannot be undone
- You are paying for two color options a clean recording does not need
Elgato Wave XLR
Elgato · The most gain of any single-channel box, built for streaming
The right box if you stream or record alone with a low-output dynamic and want the gain problem to simply not exist. It is not a general-purpose interface, and it is the wrong buy if you also record instruments.
Why it is here
- `75 dB` of gain drives an SM7B with room to spare and no booster, which is the single most common streaming problem solved outright
- Clipguard catches a shout that would otherwise clip the take
- Capacitive tap-to-mute on the top surface, which is genuinely better than reaching for a key bind
What it costs you
- One microphone input, so a co-host needs a second unit
- The mixing lives in Elgato's software, so it is a Wave Link setup rather than a neutral interface
- No MIDI, no line inputs, no instrument input
The second headphone output nobody plans for
If anyone else is ever in the room while you track a vocal — a producer, a co-writer, the person whose song it is — they need to hear it. Almost every interface at this price has exactly one headphone output, and the workarounds are a passive splitter that gives you both the same mix at the same level and drops level into low-impedance headphones, or nobody else hearing anything.
The SSL 2+ MKII and the Audient iD14 MKII are the two here with two independent outputs. That single feature is the reason the SSL tops this page over boxes with more gain.
What we did not pick, and why
- Interfaces with onboard compression on the analog path and no clean alternative. Processing you cannot undo is a decision printed into the take. The Volt 276 is here because its compressor is switchable.
- Boxes publishing neither gain nor EIN. A vocal chain is exactly where you need to plan both.
- Podcast consoles. Excellent for multi-person speech, more channels and live mixing than a vocal session wants. RodeCaster Pro II vs Zoom PodTrak P4.
- The Behringer UMC204HD. No published gain figure, which for a vocal microphone is disqualifying.
Pair it with
- A microphone matched to the gain. Best condenser microphones for vocals if your room is treated; best dynamic microphones for vocals if it is not.
- A booster, if you already own a low-output dynamic and a modest box. Best preamps for the SM7B.
- Closed-back headphones for tracking. Best headphones for mixing explains why open-backs leak into a live microphone.
- Treatment. No preamp fixes a room. How to treat a room for recording.
How to choose
- If anyone else is ever in the room, take the SSL 2+ MKII for the second headphone output.
- If you record alone and want maximum gain headroom, take the Scarlett 2i2 at 69 dB, or the Wave XLR at 75 dB if you only ever need one channel.
- If your microphone is a condenser and you want the quietest channel, take the iD14 MKII.
- If you want analog compression on the way in, take the Volt 276 — and record a clean pass alongside.
- Check your microphone's published sensitivity against whatever you pick. How much clean gain do you need has the table.
