SLXD4D Dual Wireless Mic Receiver vs ULXD4 Wireless Mic Receiver
The ULXD4 Wireless Mic Receiver costs about $300 more than the SLXD4D Dual Wireless Mic Receiver, and has 2 fewer I/O for it.
| Spec | SLXD4D Dual Wireless Mic Receiver | ULXD4 Wireless Mic Receiver |
|---|---|---|
| Rack space | 1U | 1U half-rack |
| Weight | 3.2 lbs | 2.2 lbs |
| Power draw | 12W | 12W |
| Depth | 152 mm | 220 mm |
| I/O count | 8 | 6 |
| Price | ~$899 | ~$1,199 |
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.
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.

