How We Research
We compare products from their published specs and features; the verdicts below are our independent editorial opinions.
If you want a wireless bridge that turns an older car stereo or a wired pair of headphones into something you can stream to, choose COMSOON Receiver; if you need a corded stereo headset for clear calls and music at your desk, choose PLT Poly Blackwire 3220.
• COMSOON Receiver — biggest strength: It adds Bluetooth 5.0 wireless audio to anything with a 3.5mm AUX input, runs on a rechargeable lithium-ion battery rated for up to 16 hours, and includes a built-in mic with CVC8.0 noise cancellation for hands-free calls.
• COMSOON Receiver — biggest trade-off: It is an adapter, not a headset. You still need speakers, a stereo or a pair of wired headphones for it to drive, and it tops up over 2.5 hours.
• PLT Poly Blackwire 3220 — biggest strength: A true stereo, over-ear headset with a 40mm dynamic driver, a noise-canceling boom mic, and both USB-C and USB-A connectivity for PC use.
• PLT Poly Blackwire 3220 — biggest trade-off: It is wired only. There is no battery and no wireless freedom, so you are tethered to your laptop.
• Who each pick is for: COMSOON Receiver for drivers and home-stereo owners who want wireless convenience on a budget; PLT Poly Blackwire 3220 for office and remote workers who live in video meetings.
The COMSOON Receiver is a small Bluetooth AUX adapter. In plain terms, it takes a Bluetooth signal from your phone, tablet or laptop and pushes it out through a 3.5mm stereo jack into whatever you plug it into — a car stereo, a home speaker, or a pair of wired headphones. That is the whole trick, and it is a genuinely useful one. The audio output mode is stereo, so it does not collapse your music into a single channel. It supports Bluetooth 5.0, and the manufacturer lists CVC8.0 noise cancellation plus a digital signal processor with intelligent noise reduction, which matters most when you use the built-in mic for hands-free calling in a car.
Who should buy it? Two groups. First, anyone driving an older car with an AUX port but no Bluetooth — this plugs in and gives you streaming and hands-free calls without replacing the head unit. Second, anyone with a good pair of wired headphones or a legacy home stereo who wants to cut the cord. Who should skip it? If you need a microphone close to your mouth for meetings, or if your gear has no 3.5mm input at all, this is the wrong tool. And remember, it is an adapter — it produces no sound on its own.
PLT Poly Blackwire 3220: Who It's For
The PLT Poly Blackwire 3220 is a different animal entirely: a wired, on-ear stereo headset built for work. It connects over USB-C, and Poly includes a USB-C to USB-A adapter in the box, so it works with newer laptops and older USB-A ports alike. That single detail tells you who this is designed for — people who move between machines and just want it to plug in and work, every time.
The audio side is solid on paper. It uses a 40mm dynamic driver with a 20 Hz to 20 kHz frequency range, 32 ohm impedance and 90 dB sensitivity. In practice that combination is easy to drive and honest across the range. The headset is stereo, and the microphone is noise-canceling, which is the feature that matters most when your voice needs to cut through a room. Note that the noise control listed here is passive cancellation — it is sealed earcups doing the work, not active electronics. Controls are inline on the cable, so you are not hunting for buttons on the earcup.
It weighs 118 grams and is finished in black plastic with round, on-ear cups. Poly describes the theme as business and backs it with a two-year manufacturer warranty.
Who should buy it? Remote workers, call-center staff, students and anyone who spends hours a day on virtual meeting platforms and wants a dependable corded stereo headset. Who should skip it? Anyone who wants to move around the room while listening, or who wants to use the same audio gear with a phone in a car. Wired means wired.
• Best for wireless freedom → COMSOON Receiver. Bluetooth 5.0 and up to 16 hours of battery life versus a permanently tethered cable.
• Best for stereo music listening at a desk → PLT Poly Blackwire 3220. A 40mm dynamic driver with a 20 Hz–20 kHz range is built for full-range playback; the COMSOON just passes a signal through.
• Best for microphone-heavy work → PLT Poly Blackwire 3220. A noise-canceling boom mic sits near your mouth, where the COMSOON's built-in mic has to work from wherever the adapter happens to sit.
• Best for upgrading an old car stereo → COMSOON Receiver. Plug it into the AUX jack and your phone streams straight in, with hands-free calling included.
• Best for reviving wired headphones → COMSOON Receiver. The 3.5mm output turns a passive pair of headphones into a wireless one.
• Best for plug-and-play reliability → PLT Poly Blackwire 3220. USB-C with a USB-A adapter covers almost any computer, with no charging and no pairing.
• Best for portability → COMSOON Receiver. At 65 grams and under half an inch thick, it disappears in a pocket or a glovebox.
• Best for long-term support → PLT Poly Blackwire 3220. It carries a two-year manufacturer warranty; the COMSOON's listed coverage is not specified.
In my opinion, these two barely compete — they solve opposite problems, so the honest answer is to buy the one that matches your setup. If I had to pick a single product for the most people reading this, I would choose the PLT Poly Blackwire 3220. A wired USB-C headset with a proper boom mic, a 40mm stereo driver and a two-year warranty is the safer everyday tool for work and music, and it never needs charging or pairing. I would only steer you to the COMSOON Receiver if your real problem is a car stereo or a home speaker that has no Bluetooth — in that case it is the fix, and a clever one.
FAQ
how to connect wireless headphones
how to use wireless headphones
You charge them, pair them once with your device, and then just power them on to reconnect. The COMSOON Receiver follows this pattern too: its lithium-ion battery charges in about 2.5 hours and is rated for up to 16 hours of use, and its touch controls handle playback and calls once paired.
how to wireless headphones
If what you actually want is to make existing wired gear wireless, an adapter is the shortcut. The COMSOON Receiver takes Bluetooth in and sends stereo audio out through a 3.5mm jack, which is what lets an older car stereo or a passive pair of wired headphones behave like wireless ones.
how to connect wireless headphones to a PC
On a Windows or Mac machine you open Bluetooth settings, put the headphones in pairing mode, and select them from the list. The COMSOON Receiver is listed as compatible with laptops, so it can serve a PC the same way. If you would rather skip Bluetooth entirely, the PLT Poly Blackwire 3220 plugs straight into USB-C or USB-A and needs no pairing at all.
One last note: both products change in price over time, and I don't quote numbers here on purpose. Check the current price on Amazon before you commit.
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