M4 Audio Interface vs UltraLite mk5 Audio Interface
The UltraLite mk5 Audio Interface costs about $420 more than the M4 Audio Interface and buys you 8 more I/O, plus DC Barrel. It also costs you 1 more rack unit.
| Spec | M4 Audio Interface | UltraLite mk5 Audio Interface |
|---|---|---|
| Rack space | — | 1U half-rack |
| Weight | 1.5 lbs | 3.1 lbs |
| Power draw | 5W | 15W |
| Depth | 160 mm | 209 mm |
| I/O count | 7 | 15 |
| Price | ~$280 | ~$700 |
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
M4 Audio Interface
- MIDI 5-pin DIN
UltraLite mk5 Audio Interface
- DC Barrel
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 plannerFree, no sign-up. Both units are in the catalog.

