How We Research
We compare products from their published specs and features; the verdicts below are our independent editorial opinions.
Updated: 2026-09-17 · 7 min read · Independent comparison
• Smays Replacement Game Mic — biggest strength: a direct, plug-and-play replacement boom mic built specifically for the HyperX Cloud Alpha and Cloud Alpha S, with a 360-degree bendable steel hose and a foam-covered omnidirectional capsule.
• Smays Replacement Game Mic — biggest trade-off: it only fits that headset family, and it is a microphone only — no cable length, no headphone compatibility, no cable tie.
• Mr Rex 2.5mm — biggest strength: an 8-foot (2.5 m) oxygen-free copper aux cable with a 135-degree angled metal connector and a reusable Velcro tie, made for Bose, JBL and AKG headphones with a 2.5mm jack.
• Mr Rex 2.5mm — biggest trade-off: it is a cable, not a microphone, and it explicitly does not fit Sennheiser or Audio-Technica headphones.
• Who each pick is for: Smays for Cloud Alpha owners whose mic died or went missing; Mr Rex for Bose/JBL/AKG owners who want more slack, tidier storage and a sturdier connector.
The Smays mic is a single-purpose part. It exists to bring a HyperX Cloud Alpha or Cloud Alpha S back to life after the original boom mic breaks, gets chewed by a pet, or simply disappears. It's a 5.9 inch (15 cm) boom with a 3.5mm gold-plated plug, a black steel hose that bends a full 360 degrees and holds whatever position you put it in, and a foam cover over the capsule.
The specs tell a coherent story for voice chat. The capsule is omnidirectional with a sensitivity of 32dB, which means it picks up sound roughly evenly from every direction rather than demanding you speak straight into the tip. That's a forgiving design for someone who shifts around in their chair during a raid or a long call. The gold plating on the plug is there to slow oxidation, which keeps the contact clean over time. And because it's corded and passive — no battery, no charging — it just works the moment you push it into the headset's mic port.
Who should buy it? Cloud Alpha and Cloud Alpha S owners. If your headset is otherwise fine and the only thing wrong is the mic, this is the cleanest path back to talking to your squad. It's also a sensible spare to keep in a drawer if you share the headset with a kid who is rough on detachable parts.
Mr Rex 2.5mm: Who It's For
The Mr Rex cable is the opposite kind of accessory: it doesn't fix a mic, it fixes a length problem. It runs 8 feet (2.5 meters) from a 2.5mm male plug to a 3.5mm male plug, which is the exact combination many Bose, JBL and AKG headphones use — the headphone end is the smaller 2.5mm jack, and the device end is the standard 3.5mm aux.
The length is the headline. If you plug into a desktop amp, a laptop or a PC, 8 feet lets you stand up, lean back or step away from the desk without yanking the headphones off your head. That's a genuinely different experience from the short factory cable most of these headphones ship with. Mr Rex also includes a reusable Velcro cable tie, so the extra slack doesn't turn into a nest on your desk or in your bag.
Build-wise, the cable uses oxygen-free copper conductors and a 24K gold-plated connector, and the plug is set at a 135-degree angle with a dual-layer connector cover. That angle is a small but smart detail: it takes stress off the joint where cables usually fail first, which matters if you're plugging and unplugging daily.
Compatibility is where you need to be careful. The list covers Bose 700, QC45, QC35, QC35II and QC25; a long roster of JBL models including the E45BT, E55BT and E65BTNC; and AKG models like the Y50, Y45BT and Y600NC. It explicitly does not fit Sennheiser or Audio-Technica headphones. It also carries an 18-month warranty, which is a reasonable signal of confidence for a cable.
Who should buy it? Bose, JBL or AKG owners who want more reach, a tidier setup and a connector that survives daily use. Who should skip it? Sennheiser and Audio-Technica owners, anyone who needs a microphone rather than a cable, and anyone whose headphones use a standard 3.5mm jack on both ends — this cable is specifically 2.5mm-to-3.5mm.
• Best for a broken or lost headset mic → Smays Replacement Game Mic. It's a direct replacement part for the Cloud Alpha and Cloud Alpha S, nothing more to figure out.
• Best for extra cable length → Mr Rex 2.5mm. The 8-foot run is the whole point, and it's what lets you move around while connected.
• Best for voice chat and gaming → Smays Replacement Game Mic. Omnidirectional pickup, 32dB sensitivity, bendable boom, plug-and-play over a 3.5mm aux connection.
• Best for music listening on Bose, JBL or AKG → Mr Rex 2.5mm. Oxygen-free copper and gold plating aimed at clean stereo sound and long-term durability.
• Best for tidy storage → Mr Rex 2.5mm. The included reusable Velcro tie is a small thing that makes a real difference in a bag or on a desk.
• Best for stress-resistant connectors → Mr Rex 2.5mm. The 135-degree angled plug and dual-layer cover target the spot where cables typically wear out.
• Best for a cheap insurance part → Smays Replacement Game Mic. If you own a Cloud Alpha, a spare boom mic is the kind of thing you're glad you had.
• Skip both if → you need a mic for a non-HyperX headset, or a 2.5mm cable for Sennheiser/Audio-Technica. Neither product covers those cases.
If I had to pick one, I'd buy the Smays Replacement Game Mic — but only because the question only makes sense if you own a Cloud Alpha. In my opinion, it's the more decisive purchase: it solves one specific, frustrating problem completely, and there's no compatibility guesswork beyond confirming your headset model. If you don't own a Cloud Alpha, my recommendation flips immediately — the Mr Rex 2.5mm is the better buy for Bose, JBL or AKG owners who want length and a tougher connector. Check the current price on Amazon before you commit, since both are inexpensive accessories and the math can change.
FAQ
Yes — those are both on the compatibility list, along with the Bose 700, QC45, QC25 and many JBL and AKG models. Just note it does not fit Sennheiser or Audio-Technica headphones.
The Smays mic, clearly. It's a microphone designed for headset voice chat. The Mr Rex is a cable for music headphones, so it has no mic and no gaming function at all.
For headphones, no — the 2.5mm end goes into the headphone and the 3.5mm end into your device. For phones or tablets without a 3.5mm port, you'd need a Lightning or Type-C to 3.5mm adapter.
As an Amazon Associate I earn from qualifying purchases.
We are a participant in the Amazon Services LLC Associates Program, an affiliate advertising program designed to provide a means for us to earn fees by linking to Amazon and affiliated sites.
When you buy through links on this page, we may earn a commission from qualifying purchases at no extra cost to you.
Amazon and the Amazon logo are trademarks of Amazon or its affiliates. This site is an independent third-party review and is not affiliated with, endorsed by, or sponsored by Amazon or the product brands mentioned.