The M-Audio M-Track Solo is the most honest interface under $100, because it is the only one here that publishes its gain figure — 54 dB. At this price the specification you cannot get is usually the one you need, and a number you can plan against is worth more than a feature you cannot verify.
None of that makes these unusable. A quiet room, a hot microphone and one of these boxes will produce a perfectly respectable recording, and buying one beats not recording. But the honest framing is that this is the tier where you accept known limitations, not the tier where you get a bargain.
The UMC204HD is the interesting one: it is the only 24-bit / 192 kHz box here and it has two mic inputs, which on paper makes it the most capable. It publishes no gain figure, which on this site is a significant mark against it — so it ranks second rather than first.
The four interfaces under $100, ranked
M-Audio M-Track Solo
Top pickM-Audio · A published gain figure under $100
The most honest sub-$100 interface, because it tells you what it can do. Pair it with a hot microphone and it is a genuinely usable first chain; pair it with a broadcast dynamic and it will disappoint.
Why it is here
- It publishes its gain figure, which almost nothing else under $100 does — `54 dB` is a number you can plan against
- USB bus powered and genuinely pocketable
- Clean, neutral preamp with no attempt at color
What it costs you
- 16-bit conversion, same ceiling as the cheap Behringers
- `54 dB` is not enough for an SM7B-class dynamic
- One microphone input only
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
M-Audio M-Track Duo
M-Audio · Two inputs for the price of most single-input boxes
The cheapest way to record two microphones at once, with the large caveat that only one of you can monitor. For a serious two-person setup the headphone count matters more than the price.
Why it is here
- Two combo preamps under $100, which is close to unique
- Same published `54 dB` gain figure as the Solo
- Bus powered, so a second voice costs you nothing in desk space
What it costs you
- One headphone output, so the second person cannot hear themselves
- 16-bit conversion
- `54 dB` rules out the low-output dynamics most podcasters want
Behringer U-Phoria UMC22
Behringer · The cheapest box with phantom power
Buy it only when the alternative is not recording at all, and pair it with a hot microphone. The 16-bit converter is the reason to step up to the UMC204HD or an M-Track as soon as you can.
Why it is here
- About the cheapest way to get an XLR microphone and phantom power into a computer
- A separate instrument input means a microphone and a guitar at once
- Direct monitoring, so you can hear yourself without software latency
What it costs you
- **16-bit / 48 kHz conversion** — the one genuine technical limitation at this price, and it caps your headroom for quiet sources
- Behringer publishes no maximum mic-gain figure, so a low-output dynamic is unplannable
- Build and drivers reflect the price
The microphone pairing that ruins this price tier
54 dB of gain is not enough for a low-output broadcast dynamic. An SM7B at -59.0 dBV/Pa wants about 60 dB, so on an M-Track you will be at the top of the knob listening to preamp hiss. That combination — famous microphone, cheapest interface — is the single most common disappointing first purchase in home recording.
Pair a sub-$100 interface with a hot microphone instead: the Audio-Technica BP40 at -48 dB, the Shure SM58 at -54.5 dBV/Pa, the Elgato Wave DX at -52 dBV/Pa, or any condenser — condensers sit around -33 dB and never have a gain problem.
What we did not pick, and why
- Anything over the cap. This page respects its ceiling. The Scarlett Solo and 2i2 sit above it and are the obvious step up.
- Unbranded interfaces with no published specifications at all. Cheap is not the problem; unverifiable is. If a manufacturer publishes nothing, there is nothing to rank.
- XLR-to-USB cables and dongles. Usually not enough gain and often no phantom power. XLR to USB adapters explained.
- Interfaces without phantom power. That rules out every condenser and every inline booster, which is most of the reason to own an interface.
- Bundles that include a microphone. The included microphone is chosen on cost and you will replace it. Buy the interface and choose the microphone separately.
Pair it with
- A hot microphone. Best XLR microphones lists sensitivity for every pick, which is the number that matters here.
- A quiet room. 16-bit conversion leaves less headroom, so a noisy room costs you more at this price than it would higher up. Acoustic treatment on a budget.
- Headphones that are easy to drive. A 300 ohm pair will sound thin from a budget headphone output. Best headphones for mixing.
How to choose
- If you want a gain figure you can plan against, take the M-Track Solo.
- If you want 24-bit conversion and two inputs, take the UMC204HD — and pair it with a hot microphone, because the gain is unpublished.
- If you need to record two people at once on this budget, take the M-Track Duo — but note only one of you can monitor.
- Only take the UMC22 if it is the cheapest thing that will work, and treat it as temporary.
- If you can stretch past the cap, do. The $200 tier fixes both the gain and the converter problem at once.
