Quantum HD 8 vs ALPHA 8
The ALPHA 8 costs about $100 more than the Quantum HD 8 and buys you RCA.
PreSonus
Quantum HD 8Solid State Logic
ALPHA 8| Spec | Quantum HD 8 | ALPHA 8 |
|---|---|---|
| Rack space | 1U | 1U |
| Weight | 6.3 lbs | 7.9 lbs |
| Power draw | Passive | Passive |
| Depth | 219 mm | 294 mm |
| I/O count | 33 | 27 |
| Price | ~$799.99 | ~$899.99 |
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
Quantum HD 8
- TS 1/4"
- D-sub 9
- Combo XLR/TRS
ALPHA 8
- RCA
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.