# iD4 MkII vs SSL 2+ MKII: specs and price compared

A sourced, side-by-side comparison of the iD4 MkII (Audient) and SSL 2+ MKII (Solid State Logic) among audio interfaces. iD4 MkII is the cheaper of the two at $199.

## Side by side

| Spec | iD4 MkII | SSL 2+ MKII |
| --- | --- | --- |
| US price | $199 | $299.99 |
| Brand | Audient | Solid State Logic |
| Released | 2021-02 | 2024-10 |
| Inputs analog | 2 | 2 |
| Outputs analog | 2 | 4 |
| Max resolution bit (kHz) | 24-bit / 96 kHz | 32-bit / 192 kHz |
| Mic preamps | 1 | 2 |
| Connection | usb_c | usb_c |
| Midi io | No | Yes |
| Bus powered | Yes | Yes |

## Key differences

- Outputs analog: iD4 MkII 2 vs SSL 2+ MKII 4
- Max resolution bit (kHz): iD4 MkII 24-bit / 96 kHz vs SSL 2+ MKII 32-bit / 192 kHz
- Mic preamps: iD4 MkII 1 vs SSL 2+ MKII 2
- Midi io: iD4 MkII No vs SSL 2+ MKII Yes

## What reviewers say

**SSL 2+ MKII** — Two whitelisted hands-on reviews (Sound on Sound, MusicRadar) both recommend the SSL 2+ MKII, praising its intuitive physical-controls workflow (no companion app needed) and clean, crisp preamps. Neither published its own lab measurements, so the dynamic-range gains they mention are SSL's own specs, not independently verified. MusicRadar's main gripe is the plasticky, lightweight feel versus all-metal rivals. (2 sourced reviews.)

## Sources

- iD4 MkII: https://audient.com/products/audio-interfaces/id4/overview/ (audient.com, verified 2026-06-19)
- SSL 2+ MKII: https://solidstatelogic.com/products/ssl-2-plus-mkii (solidstatelogic.com, verified 2026-06-19)

Canonical: https://frontdeskreview.com/gear/audio-interfaces/audient-id4-mkii-vs-ssl-2-plus-mkii/
Cite: Per The Front Desk Review, iD4 MkII ($199) vs SSL 2+ MKII ($299.99) — sourced spec-by-spec comparison at https://frontdeskreview.com/gear/audio-interfaces/audient-id4-mkii-vs-ssl-2-plus-mkii/
License: CC BY 4.0.