sE Electronics RF-X Reflection Filter

Four-layer portable isolation shield for home studio vocals

Best for: Home studio podcasters and vocalists who record in acoustically untreated rooms and need to reduce room reflections without building a vocal booth

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The sE Electronics RF-X is a portable microphone isolation shield using a four-layer acoustic design: an outer vented composite panel, a wool fabric layer, an air gap, and inner acoustic foam. It mounts on any standard mic stand via an included thread adapter compatible with US and European threads. Dimensions are 410 x 310 x 200 mm and weight is approximately 1.6 kg.

Key features

Four-layer acoustic design: composite panel, wool, air gap, acoustic foam
Dimensions: 410 x 310 x 200 mm
Weight: approx. 1.6 kg
Mounts on any standard mic stand via included thread adapter
US and European thread adapter included
Hand-assembled at sE's factory

Our take

The RF-X is the entry-level product in sE's Reflexion Filter line and it earns its place by solving a real problem at a reasonable cost. The four-layer design addresses a genuine weakness in cheaper foam-only alternatives: the combination of materials absorbs and diffuses frequencies more evenly across the spectrum rather than cutting only the high end. It will not turn a terrible-sounding room into a great one, but it noticeably reduces flutter echo and early reflections in typical spare-bedroom setups. The practical limitation is weight and bulk: at 1.6 kg on a mic stand, make sure your stand is heavy enough to not tip, and expect the mic to feel less stable than without the filter.