Clarett+ OctoPre vs Scarlett 18i20 4th Gen
The Clarett+ OctoPre costs about $130 more than the Scarlett 18i20 4th Gen and buys you DB25. Budget 30W more on the circuit.
Focusrite
Clarett+ OctoPreFocusrite
Scarlett 18i20 4th Gen| Spec | Clarett+ OctoPre | Scarlett 18i20 4th Gen |
|---|---|---|
| Rack space | 1U | 1U |
| Weight | 9.1 lbs | 7.3 lbs |
| Power draw | 30W | Passive |
| Depth | 286 mm | 260 mm |
| I/O count | 24 | 33 |
| Price | ~$899.99 | ~$769.99 |
Highlighted where one is plainly lighter, smaller, cheaper or draws less. I/O count is left unmarked on purpose — more connectors you don't need is weight, cost and a bigger case.
Connectors only one of them has
Clarett+ OctoPre
- DB25
Scarlett 18i20 4th Gen
- USB-C
- RCA
- MIDI 5-pin DIN
Settle it in your own rack
Specs decide less than fit does. Drop either one into your rig and see the real answer — what space is left, what the circuit draws, and whether every cable it needs actually lands somewhere.
Open the rack plannerTry 15 minutes without an account. Both units are in the catalog.

