Clarett+ OctoPre vs Quantum HD 8
The Clarett+ OctoPre costs about $100 more than the Quantum HD 8 and buys you DB25. Budget 30W more on the circuit.
Focusrite
Clarett+ OctoPrePreSonus
Quantum HD 8| Spec | Clarett+ OctoPre | Quantum HD 8 |
|---|---|---|
| Rack space | 1U | 1U |
| Weight | 9.1 lbs | 6.3 lbs |
| Power draw | 30W | Passive |
| Depth | 286 mm | 219 mm |
| I/O count | 24 | 33 |
| Price | ~$899.99 | ~$799.99 |
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
Quantum HD 8
- TS 1/4"
- USB-C
- D-sub 9
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.

