sE Electronics Reflexion Filter PRO Microphone Isolation Shield (Silver)

sE Electronics RF PRO: The Original Portable Vocal Booth for Untreated Rooms

The sE Electronics RF PRO is a portable acoustic treatment device and microphone isolation shield built around a patented nine-layer panel that absorbs and diffuses sound across the full frequency range. Invented by sE in 2006, it created the reflexion filter category and remains the reference every competing shield is measured against, with more than 120,000 units in the field. It mounts to any standard mic stand and curves behind your microphone to intercept the room reflections that smear and hollow out a recording before they reach the capsule. This is the one acoustic tool you buy once and keep on every session for the life of your studio.

Patented Nine-Layer Multi-Layer Construction

At the heart of the RF PRO is its patented nine-layer construction, a stack of absorptive and diffusive materials engineered to treat the entire frequency spectrum rather than only the mids and highs. A single slab of acoustic foam absorbs short high-frequency wavelengths well but is nearly transparent to longer low-frequency waves, which is why foam-only shields leave a boxy, uneven tone behind. The RF PRO instead layers formed acoustic panels with air gaps so incoming sound is progressively absorbed and what passes through is scattered rather than reflected straight back. For a home or project-studio vocalist, that full-spectrum behavior is what turns a hollow, roomy take into a tight, dry, mix-ready track that sits forward in the mix.

Reduced Comb Filtering for a Cleaner, Drier Sound

The RF PRO's core job is to reduce comb filtering, the sonic problem that gives untreated-room recordings their hollow, phasey character. Comb filtering happens when reflections bounce off nearby walls and desks and arrive back at the microphone a few milliseconds after the direct sound, reinforcing some frequencies and cancelling others in a comb-shaped pattern across the spectrum. By absorbing and diffusing those early reflections before they return to the capsule, the RF PRO preserves the natural body of the source while stripping away the room's fingerprint. The audible result is a drier, more focused vocal or instrument that needs far less corrective EQ and reverb repair later in the mix.

Full Pan-and-Tilt Positioning with Chromatized Hardware

The RF PRO mounts on a redesigned bracket that offers full pan and tilt and locks solidly at any angle you set. Its chromatized moving parts resist wear so the filter holds its position through repeated setup and teardown without drifting or loosening over time. Because acoustic performance depends on the panel sitting square and close behind the microphone, this rigid, lockable geometry is not a convenience feature but a requirement for consistent results. Engineers can angle the shield precisely around the mic for vocals, then re-aim it low and tilted for a guitar amp, and trust it to stay exactly where they left it.

Fits Any Standard Mic Stand

The RF PRO ships with a mic-stand thread adapter and screw wrench so it fits any standard mic stand without proprietary hardware. This universal mounting means the filter drops straight into the rig you already own, whether that is a heavy studio boom or a simple tripod stand. Because the assembled panel weighs about 3.3 pounds, sE recommends pairing it with a sturdy, weighted stand so the combined mic-and-shield load stays balanced and stable. That single-stand approach keeps a home studio compact and lets you strike the whole setup in seconds when the room goes back to being a bedroom.

One Shield for Vocals, Guitars, Amps, Drums and More

While it is best known as a vocal booth, the RF PRO is designed to dry up almost any source, from acoustic and electric guitar to amps, drums, room mics and strings. The same reflection control that tightens a lead vocal also isolates a single drum in a kit or focuses a close mic on an amp cabinet in a live room. Because the panel treats sound acoustically rather than electronically, it works identically with any microphone and adds no coloration, noise or latency of its own. That versatility makes it a shared studio tool that follows the session from a voice-over in the morning to a guitar overdub in the afternoon.

Premium 20 x 12 x 4-Inch Panel Built to Last

The RF PRO's panel measures 20 x 12 x 4 inches (508 x 305 x 102 mm) and is finished in brushed silver aluminum for a professional studio look. Its rigid metal-and-composite construction is a deliberate contrast to flimsy foam shields, giving the layered absorbers a stable frame that will not sag or compress with age. That durability is why the design has survived essentially unchanged for well over a decade and why used units still perform to spec. For a buyer investing in acoustic treatment once, the RF PRO's build quality means the shield outlasts the microphones, interfaces and rooms it is used with.

The Industry-Standard Reflexion Filter

With more than 120,000 units in studios worldwide, the RF PRO is the original and industry-standard portable acoustic treatment device. It suits the first-time home recordist who needs to tame an untreated bedroom, the podcaster or voice-over artist chasing a clean broadcast tone, and the working engineer who wants a proven, no-compromise shield for pro sessions. Buyers cross-shopping basic foam shields choose the RF PRO because its multi-layer design controls low frequencies those alternatives cannot touch. It is the reflexion filter the category was named after, and the safe long-term choice for anyone serious about recording in a real-world room.