Focusrite Scarlett 4i4 4th Gen vs Focusrite Scarlett 18i20 3rd Gen
Get the Focusrite Scarlett 18i20 3rd Gen, narrowly. The Focusrite Scarlett 18i20 3rd Gen wins Monitoring and Connectivity, but only just, and the rest of...
The Ruling
Focusrite Scarlett 4i4 4th Gen or Focusrite Scarlett 18i20 3rd Gen? Get the Focusrite Scarlett 18i20 3rd Gen, narrowly.
The Focusrite Scarlett 18i20 3rd Gen wins Monitoring and Connectivity — but only just, and the rest of the chart is close. It is the pricier of the two at $599.99, so the Focusrite Scarlett 4i4 4th Gen stays the pick if $300 matters more than those specs.
Unless…
- You need preamps — get the Focusrite Scarlett 4i4 4th Gen.
At a Glance
Where each one actually leads
Every axis is scored out of 10 from the catalog specs below. The scores are relative to the products on this page, so a 10 means “best of these”, not “perfect”, and two identical columns mean the catalog genuinely cannot separate them. Axes the catalog holds no figure for on both sides are left off entirely rather than guessed at.
| Category | Focusrite Scarlett 4i4 4th Gen | Focusrite Scarlett 18i20 3rd Gen |
|---|---|---|
| Audio Resolution | 10/10 | 10/10 |
| Preamps | 10/10 | 8.7/10 |
| Mic Inputs | 10/10 | 10/10 |
| Monitoring | 7.5/10 | 10/10 |
| Creator Features | 5/10 | 5/10 |
| Connectivity | 4/10 | 10/10 |
The Split
What each one wins
Focusrite Scarlett 4i4 4th Gen
Desktop audio interface intended for creator workflows, microphone input, monitoring, and clean signal routing.
On paper the Focusrite Scarlett 4i4 4th Gen takes loopback (Yes), bus powered (Yes) and preamp gain (69dB, +9dB). It gives up ADAT expansion and TRS outputs to the Focusrite Scarlett 18i20 3rd Gen. It is the cheaper of the two, by $300.00.
Leads on
-
LoopbackYesNo
Loopback routes computer audio back into the stream without a second interface or cable.
-
Bus PoweredYesNo
Bus power means the interface runs off USB alone — no wall adapter to carry or find a socket for.
-
Preamp Gain +9dB69dB60dB
More gain drives quiet dynamic microphones like the SM7B without a separate booster.
Focusrite Scarlett 18i20 3rd Gen
Desktop audio interface intended for creator workflows, microphone input, monitoring, and clean signal routing.
On paper the Focusrite Scarlett 18i20 3rd Gen takes ADAT expansion (Yes), TRS outputs (10, +6) and headphone outputs (2, +1). It gives up loopback and bus powered to the Focusrite Scarlett 4i4 4th Gen. That costs $300.00 more than the Focusrite Scarlett 4i4 4th Gen.
Leads on
-
ADAT ExpansionYesNo
ADAT lets you add eight more inputs later instead of replacing the interface.
-
TRS Outputs +6104
More TRS outputs allow routing to studio monitors and outboard gear.
-
Headphone Outputs +121
A second headphone output lets a guest monitor without a splitter.
Where they’re identical
These 9 specs are the same on both of them, so none of it is part of the decision.
- Connection Type usb-c, xlr, trs
- Operating System windows, macos
- Sample Rate 192kHz
- Bit Depth 24-bit
- Max Sample Rate 192kHz
- Phantom Power Yes
- XLR Inputs 2
- Direct Monitoring Yes
- MIDI I/O In/Out
The Record
19 specs, grouped by area
A group is won by whoever takes more of its rows outright. Specs the catalog cannot rank are shown but never decide a group.
Bottom Line
Who each one is for
The Focusrite Scarlett 18i20 3rd Gen is the pick on the specs the catalog holds, but “better on paper” and “right for you” are different questions. Each case below names what the product is actually good at and who that suits.
Frequently Asked Questions
What is the main difference between Focusrite Scarlett 4i4 4th Gen and Focusrite Scarlett 18i20 3rd Gen?
The clearest difference is loopback, which the Focusrite Scarlett 4i4 4th Gen has and the Focusrite Scarlett 18i20 3rd Gen does not. Across the catalog's specification sheet the two differ on 6 specs. They match on 9 specs, including connection type, operating system and sample rate. Two audio interfaces from Focusrite, each taking a different approach to audio quality and I/O flexibility.
Which is better for streaming, Focusrite Scarlett 4i4 4th Gen or Focusrite Scarlett 18i20 3rd Gen?
Get the Focusrite Scarlett 18i20 3rd Gen, narrowly. The Focusrite Scarlett 18i20 3rd Gen wins Monitoring and Connectivity — but only just, and the rest of the chart is close. It is the pricier of the two at $599.99, so the Focusrite Scarlett 4i4 4th Gen stays the pick if $300 matters more than those specs.
What do the Focusrite Scarlett 4i4 4th Gen and Focusrite Scarlett 18i20 3rd Gen have in common?
Both share 9 specifications in the catalog, including connection type (usb-c, xlr, trs), operating system (windows, macos), sample rate (192kHz) and bit depth (24-bit), among others. None of those is a reason to pick one over the other.
Is the Focusrite Scarlett 18i20 3rd Gen worth the extra $300 over the Focusrite Scarlett 4i4 4th Gen?
The Focusrite Scarlett 18i20 3rd Gen costs $599.99 against $299.99, a difference of $300. The premium buys ADAT expansion (Yes), TRS outputs (10) and headphone outputs (2). Whether that is worth it depends on which of those you would actually use.