Best Digital Wireless Microphone Systems

This is the whole case for digital in one table. An open 6 MHz TV channel at your address is the unit of currency, and how many microphones fit inside it depends on how widely the system has to space them to avoid intermodulation products landing on another channel. Analog needs room. Digital needs less. The difference compounds fast once the channel count climbs.

Three real advantages beyond channel count. There is no compander, the matched compressor and expander pair that analog uses to squeeze audio into a radio channel, so the artefacts it produces are simply absent. There is usually no gain control on the transmitter to set wrongly, because the system has enough input dynamic range to handle a shouted vocal and a quiet reading without anyone adjusting anything, which matters far more with a rotating volunteer team than any specification. And encryption is available on most digital systems, which matters for a church streaming a service where a pastoral conversation might be picked up on an open microphone.

The cost, besides money, is latency. Converting audio to data and back takes a few milliseconds, typically under four, which is inaudible on its own. It stacks, though: a digital wireless microphone into a digital console into a digital in-ear system adds up, and a singer on in-ears is sensitive to the total in a way a congregation never is. Budget the latency across the whole chain rather than per device. The full comparison is at analog versus digital wireless and BLX versus SLXD.

Say this plainly, because the industry rarely does: a church running four analog channels in a market with plenty of open TV spectrum has nothing to gain from switching. The audible difference is inaudible in a pew, the channel density advantage solves a problem that church does not have, and the same money spent on a headworn capsule for the preacher or on treating the room would be obvious from every seat. Analog wireless has worked for decades and continues to.

The signals that it is time to move are specific: you cannot find enough clear frequencies during a scan, you are coordinating more than about six transmitters including in-ear packs, a neighbouring venue or a new TV station has taken your open channels, or your volunteer team keeps setting transmitter gain wrongly. Any one of those justifies the step. None of them is sound quality. For the platform level comparisons see SLXD versus EW-D and Shure versus Sennheiser, and for how the whole plan fits together, how to coordinate wireless frequencies.