The Focusrite Scarlett 2i2 (4th Gen) is the best interface for a Windows PC: 69 dB of published mic gain is the most at its price, 120 dB dynamic range means the converters are not the limit, and Focusrite's ASIO drivers are the most mature in this price band.
Windows is the one platform where the driver is a real part of the purchase. macOS interfaces are class-compliant and simply appear; Windows needs an ASIO driver to get usable latency, and the quality of that driver is entirely down to the manufacturer. A box with excellent converters and a flaky driver is a worse buy than a modest box with a solid one.
What actually differs on Windows
- A real ASIO driver, not ASIO4ALL. ASIO4ALL is a wrapper around the generic Windows driver. It works, and it is a fallback rather than a feature. Every interface here ships a native ASIO driver.
- Stable low buffer sizes. The number that matters is not the lowest buffer the driver will accept, but the lowest it holds without crackling for an hour.
- Driver longevity. Windows updates break audio drivers. What you want is a manufacturer that has kept shipping updates for old hardware, which is a track record rather than a specification.
- USB chipset tolerance. Some interfaces are noticeably fussier about which USB controller they are plugged into. A rear-panel port directly on the motherboard is always the better bet than a front-panel or hub port.
The five interfaces, ranked for Windows
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
Steinberg UR22C
Steinberg · Windows driver quality and a hardware loopback switch
The pick on Windows if driver stability and a physical loopback switch matter to you. The missing gain figure makes it a gamble with a low-output broadcast dynamic — pair it with a hot microphone.
Why it is here
- A hardware loopback switch rather than a software setting, which is the difference between streaming working and streaming needing a manual
- Yamaha-lineage Windows drivers, historically the most stable in this price band
- MIDI in and out plus onboard DSP monitoring FX
What it costs you
- Steinberg does not publish a maximum mic-gain figure, so you cannot plan a gain budget for a quiet dynamic
- The DSP FX are monitoring-only and add nothing to the recording
- 32-bit conversion is a headline number rather than an audible advantage
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
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 that rely on ASIO4ALL. If a manufacturer does not ship a native Windows driver at this price, that tells you where the product sits.
- Gaming sound cards and headsets. They cannot accept an XLR microphone at all — see audio interface vs sound card.
- Thunderbolt-only interfaces. Thunderbolt on Windows is far less universal than on a Mac, and a Thunderbolt box on a machine without a certified port is an expensive paperweight.
- Anything that publishes neither a gain figure nor a dynamic-range figure. There is nothing left to evaluate.
Pair it with
- A microphone the box can drive. Best XLR microphones, and check the sensitivity against the gain figure.
- A rear USB port on the motherboard, not a front-panel or hub port. Free, and it resolves a surprising share of crackle complaints.
- Headphones the output can drive. Best headphones for mixing — a 300 ohm pair is a real load.
How to choose
- If your microphone is a low-output dynamic, take the Scarlett 2i2. 69 dB published, and you can plan against it.
- If you stream and want loopback you can flick rather than configure, take the UR22C — a hardware switch beats a software setting.
- If conversion quality is your priority and your mic is hot, take the MOTU M2.
- If you record with someone else, take the SSL 2+ MKII for its two independent headphone outputs.
- Only take the UMC204HD if the alternative is not recording, and expect to replace it.
