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We compare products from their published specs and features; the verdicts below are our independent editorial opinions.
Updated: 2026-10-07 · 6 min read · Independent comparison
• PLT Poly's biggest strength: A complete dual-ear wired headset with Poly Quick Disconnect, acoustic hearing protection that manages safe volume, and integration with Avaya, Genesys and Cisco call platforms. It's the whole tool, not a part.
• PLT Poly's biggest trade-off: It's wired and tethered to a QD adapter setup, so it's not a grab-and-go wireless option, and it's aimed at call-center and business voice work rather than casual listening.
• RadiArmor's biggest strength: A dual-layer on-ear cover that positions silver-infused RF-blocking fabric between the headset and your head, reducing RF exposure by up to 90–98% while leaving the rest of the earpad open so Bluetooth signal and sound stay intact.
• RadiArmor's biggest trade-off: It's not a headset at all — it's a cover. You need an existing on-ear wireless headset with earpads between 5.5 and 8 cm in diameter, and you have to measure first.
• Choose PLT Poly if you want one wired, durable, business-ready headset out of the box.
• Choose RadiArmor if you already wear a Bluetooth on-ear headset for hours a day and want less RF exposure without replacing your gear.
The EncorePro 520 QD is a professional wired headset with a dual-ear wearing style, which means it seals you off from the room on both sides. That's the point: the spec sheet frames it for the call-center employee working from home or moving to cloud communications, and dual-ear wearing is explicitly there to keep you distraction-free. If your day is a stack of calls and you need to hear every word without a noisy kitchen bleeding in, that design choice does real work.
Connectivity runs through Poly Quick Disconnect technology and works with Poly digital adapters — so the headset is meant to plug into a deskphone or adapter ecosystem, not to pair with your phone over Bluetooth. It also lists integration with Avaya, Genesys and Cisco call-center platforms, which tells you who this is built for: people whose job runs through a business voice platform. Add the 2-year warranty, the metal enclosure, and the durable cable construction, and you get a headset designed to survive being picked up, put down, and yanked off a hundred times a week.
Acoustic protection is the feature I'd point a manager toward. The headset manages safe volume to protect hearing across an organization — a genuinely practical detail if you or your team live in a headset eight hours a day. The trade-offs are equally clear: it's wired, it needs QD adapters to shine, and the styling is squarely "business." If you want something for music on the train or a wireless walk-around headset, this isn't that. And if your actual goal is best headphones for vlogging with freedom of movement, a tethered call-center headset is the wrong shape of tool.
RadiArmor's product is a cover for on-ear wireless headsets, and the logic behind it is the most interesting thing about it. The company's own framing is blunt: plenty of EMF products quote how much a shielding material blocks in isolation, but that number means nothing if the material isn't between you and the source. A sticker on the outside of a headset protects nobody. RadiArmor's covers sit between your head and the headset, which is why they claim an effective reduction of 90–98% toward your head rather than a lab-only figure.
The construction is dual-layer: a soft outer fabric for comfort and durability, and an inner liner using silver-infused shielding material (the enclosure materials listed are silver, nylon, polyester and elastic). Critically, the shielding is targeted — the rest of the earpad stays uncovered, so Bluetooth strength and sound quality are meant to survive the treatment. Each cover fits earpads between 5.5 and 8 cm (roughly 2.2–3.1 inches) in diameter, and RadiArmor names the Jabra Evolve series, Plantronics Voyager series, Poly Voyager series, Logitech Zone Wireless and Jlab Go Work as compatible, plus many on-ear headphones for casual listening. Measure your earpads before ordering; that's the one hard gate.
Side-by-Side: Which Should You Choose?
• You need an actual headset, not an accessory → PLT Poly. It's a complete dual-ear wired unit; RadiArmor is a cover you put on something you already own.
• You want to reduce RF exposure from a wireless on-ear headset → RadiArmor. That's its entire purpose, with a stated 90–98% effective reduction toward the head.
• You work on Avaya, Genesys or Cisco call platforms → PLT Poly. Platform integration is a listed feature; RadiArmor has no role in your call stack.
• You care about hearing protection at volume → PLT Poly. Acoustic protection that manages safe volume is built in.
• You already own a Jabra Evolve, Poly Voyager, Logitech Zone Wireless or Jlab Go Work → RadiArmor, provided your earpads measure 5.5–8 cm.
• You want wireless freedom → RadiArmor is built around wireless headsets, whereas PLT Poly is wired with Quick Disconnect.
• You want a low-commitment add-on → RadiArmor. One cover, one headset, no adapter shopping.
• You're outfitting a team with one purchase → PLT Poly, since it's a full headset with a 2-year warranty and platform compatibility.
If I had to pick one for myself, I'd buy the PLT Poly EncorePro 520 QD — but only because my need is a complete, durable, wired headset for voice work, and it delivers that as a finished product rather than a component. If your situation is the opposite — you already love your wireless on-ear headset and want less RF exposure while you wear it for vlogging or long work sessions — I'd buy the RadiArmor RF Blocking Headset cover instead. They're not competitors so much as two answers to different questions. Match the product to your problem, check the current price on Amazon for whichever fits, and don't buy the cover if you don't own a compatible headset.
An on-ear headset rests against the outer ear rather than surrounding it. Its earpads sit on the ear, which keeps the cups compact and light. RadiArmor's covers are designed specifically for this style, fitting earpads 5.5–8 cm in diameter.
An over-ear headset has larger cups that enclose the whole ear. PLT Poly's spec sheet lists over-ear placement with a rounded enclosure, and it uses dual-ear wearing to block out room noise for call-center work.
A single-ear headset puts one earpiece on one ear so the other ear stays open to your surroundings. PLT Poly, by contrast, is a dual-ear design — both ears are covered to keep you distraction-free during calls.
If you mean adjusting an earpiece for comfort, on-ear models like the ones RadiArmor covers fit by resting the pad against the ear; check that the pad diameter falls within 5.5–8 cm before fitting a cover.
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