SSL 2+ USB Audio Interface vs Focusrite Scarlett 18i20 3rd Gen

Get the Focusrite Scarlett 18i20 3rd Gen. The Focusrite Scarlett 18i20 3rd Gen wins Creator Features and Connectivity. It is the pricier of the two at...

SSL 2+ USB Audio Interface
SSL
SSL 2+ USB Audio Interface
$199
Focusrite Scarlett 18i20 3rd Gen
Focusrite
Focusrite Scarlett 18i20 3rd Gen
$599.99

The Ruling

SSL 2+ USB Audio Interface or Focusrite Scarlett 18i20 3rd Gen? Get the Focusrite Scarlett 18i20 3rd Gen.

The Focusrite Scarlett 18i20 3rd Gen wins Creator Features and Connectivity. It is the pricier of the two at $599.99, so the SSL 2+ USB Audio Interface stays the pick if $400.99 matters more than those specs.

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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.

CategorySSL 2+ USB Audio InterfaceFocusrite Scarlett 18i20 3rd Gen
Audio Resolution10/1010/10
Preamps10/109.7/10
Mic Inputs10/1010/10
Monitoring10/1010/10
Creator Features5/1010/10
Connectivity4/1010/10

The Split

What each one wins

SSL 2+ USB Audio Interface

Desktop audio interface intended for creator workflows, microphone input, monitoring, and clean signal routing.

On paper the SSL 2+ USB Audio Interface takes bus powered (Yes) and preamp gain (62dB, +2dB). It gives up ADAT expansion and TRS outputs to the Focusrite Scarlett 18i20 3rd Gen. It is the cheaper of the two, by $400.99.

Leads on

  • Bus Powered
    Yes
    No

    Bus power means the interface runs off USB alone — no wall adapter to carry or find a socket for.

  • Preamp Gain +2dB
    62dB
    60dB

    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) and TRS outputs (10, +6). It gives up bus powered and preamp gain to the SSL 2+ USB Audio Interface. That costs $400.99 more than the SSL 2+ USB Audio Interface.

Leads on

  • ADAT Expansion
    Yes
    No

    ADAT lets you add eight more inputs later instead of replacing the interface.

  • TRS Outputs +6
    10
    4

    More TRS outputs allow routing to studio monitors and outboard gear.

Where they’re identical

These 10 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
  • Phantom Power Yes
  • XLR Inputs 2
  • Headphone Outputs 2
  • Direct Monitoring Yes
  • Loopback No
  • MIDI I/O In/Out

The Record

19 specs, grouped by area

Full specification comparison of SSL 2+ USB Audio Interface and Focusrite Scarlett 18i20 3rd Gen, grouped by area.
Specification
SSL
SSL 2+ USB Audio Interface
Focusrite
Focusrite Scarlett 18i20 3rd Gen
Audio ResolutionEven
Sample Rate192kHz192kHz
Max Sample Rateno data192kHz
Bit Depth24-bit24-bit
PreampsSSL 2+ USB Audio Interface
Preamp Gain✓ 62dB60dB
Dynamic Range110.5dBno data
Mic InputsEven
XLR Inputs22
MonitoringEven
Headphone Outputs22
Direct MonitoringYesYes
Creator FeaturesFocusrite Scarlett 18i20 3rd Gen
LoopbackNoNo
ADAT ExpansionNo✓ Yes
MIDI I/OIn/OutIn/Out
Bundled Softwareno datano data
ConnectivityFocusrite Scarlett 18i20 3rd Gen
TRS Outputs4✓ 10
Connection Typeusb-c, xlr, trsusb-c, xlr, trs
PowerSSL 2+ USB Audio Interface
Bus Powered✓ YesNo
Phantom PowerYesYes
BuildNot enough data
Dimensionsno datano data
Weightno datano data
CompatibilityNot enough data
Operating Systemwindows, macoswindows, macos

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.

The alternative
Best Value

At $199.00, the SSL 2+ USB Audio Interface is the most affordable option — 67% less than the priciest pick. It leads in preamp gain (62dB) and bus powered (Yes). Offers the most spec advantages per dollar in this comparison.

  • + Better preamp gain (62dB vs 60dB)
  • + Better bus powered (Yes vs No)
  • × Weaker ADAT expansion (No vs Yes)
  • × Fewer TRS outputs (4 vs 10)

Also worth knowing

  • ✓ You want the stronger preamp gain (62dB)
  • ✓ You want the stronger bus powered (Yes)
  • ✓ Budget is your top priority — $400.99 less than the priciest option
  • ✓ You want it to run off USB alone, with no power adapter to carry

Look elsewhere if

  • × You need the best ADAT expansion available
  • × You need the best TRS outputs available

Best for value-focused buyers.

Our pick
Most Connectivity

At $599.99, the Focusrite Scarlett 18i20 3rd Gen is the priciest option — a premium pick if brand, build, or specific features matter to you. It leads in ADAT expansion (Yes) and TRS outputs (10). More I/O options for complex setups.

  • + Better ADAT expansion (Yes vs No)
  • + More TRS outputs (10 vs 4)
  • × Weaker preamp gain (60dB vs 62dB)
  • × Weaker bus powered (No vs Yes)

Also worth knowing

  • ✓ You want the stronger ADAT expansion (Yes)
  • ✓ You want the stronger TRS outputs (10)
  • ✓ You want room for eight more inputs later, without replacing the box

Look elsewhere if

  • × You need the best preamp gain available
  • × You need the best bus powered available

Best for complex setup builders.

Frequently Asked Questions

What is the main difference between SSL 2+ USB Audio Interface and Focusrite Scarlett 18i20 3rd Gen?

The clearest difference is ADAT expansion, which the Focusrite Scarlett 18i20 3rd Gen has and the SSL 2+ USB Audio Interface does not. Across the catalog's specification sheet the two differ on 4 specs. They match on 10 specs, including connection type, operating system and sample rate. Two audio interfaces from SSL and Focusrite, each taking a different approach to audio quality and I/O flexibility.

Which is better for streaming, SSL 2+ USB Audio Interface or Focusrite Scarlett 18i20 3rd Gen?

Get the Focusrite Scarlett 18i20 3rd Gen. The Focusrite Scarlett 18i20 3rd Gen wins Creator Features and Connectivity. It is the pricier of the two at $599.99, so the SSL 2+ USB Audio Interface stays the pick if $400.99 matters more than those specs.

What do the SSL 2+ USB Audio Interface and Focusrite Scarlett 18i20 3rd Gen have in common?

Both share 10 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 $401 over the SSL 2+ USB Audio Interface?

The Focusrite Scarlett 18i20 3rd Gen costs $599.99 against $199.00, a difference of $401. The premium buys ADAT expansion (Yes) and TRS outputs (10). Whether that is worth it depends on which of those you would actually use.

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