Sennheiser EM 300 G4 Wireless Mic Receiver

The EM 300 G4 is Sennheiser's half-rack single-channel receiver in the Evolution Wireless G4 line — the box that turns one RF signal into one audio channel. Pair it with an SKM 500 G4 handheld or SK 500 G4 bodypack and you have a complete wireless channel for a vocalist, acoustic guitar, or whatever else needs to cut the cable. It handles exactly one source. If you're running four wireless channels, you're mounting four of these, which is where rack planning actually starts to matter — two units share a single rack unit when coupled in a half-rack tray, so a fully wireless band can stay surprisingly compact.

At 6 watts nominal draw and a shallow 200 mm depth, the EM 300 G4 plays nicely in tight rigs. The dual BNC antenna inputs support diversity reception, but the real load-in story is antenna management: four receivers sprouting eight whips from the rack face is a cabling disaster waiting to happen. Plan a BNC antenna distribution system — an RF Venue Distro4 or Sennheiser ASA 1 — from the start, and route clean coax runs to a pair of paddles mounted where they actually have line of sight to the stage. Both XLR and quarter-inch outputs are present, so you can feed a console or a direct pedalboard input without an adapter in a pinch.

This receiver is well-suited to mid-sized touring rigs, house-of-worship systems, and corporate event packages where you want reliable G4 performance without stepping up to the G4 500-series rack-mount receivers. If you only need one or two channels occasionally, it gets the job done cleanly. Where it stops making sense is large-scale shows with twelve or more channels — at that count you're managing a lot of individual half-rack units and separate power supplies, and a dedicated multi-channel rack system becomes easier to maintain under pressure. Budget the full antenna distribution system into your planning from day one; treating it as an optional add-on leads to RF headaches at showtime.