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Finally, the Slick Bluetooth Upgrade My Beloved Shure Earbuds Deserve

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Photo: Alex Cranz (Gizmodo)

Every year or so Gizmodo senior editor Adam Clark Estes tells me he’s found a pair of headphones that are genuinely exceptional, and so I, being a headphones hoarder, am obliged to try them out. Usually, he’s right! But when it comes to in-ear headphones, his suggestions have left me filled with regret and my wallet woefully empty. You can’t just borrow your buddy’s in-ear headphones or earbuds—it’s disgusting. So Adam suggests a pair of earbuds and tells me they fit great, and I buy them and immediately hate them, and thank goodness my roommate and my dad don’t have the same hang-ups about sharing earbuds, you know?


What I’m saying is earbuds are personal, and everyone’s ears are very different, and what fits your ears perfectly might not fit mine. That’s why there’s a big nerdy market of in-ear monitors, which is just a pretentious name for earbuds that go inside your ear. There are so many kinds that you can undoubtedly find a pair with the perfect fit and the perfect sound for your ears.

And if you can’t find headphones that fit, you can at least get some nice earbuds that support custom molds. Unfortunately, that customizability doesn’t apply to most wireless buds we like and recommend on this blog. The Jabra Elite 65T that Adam raves about (and they do sound good) aren’t compatible with custom molds. Meanwhile, AirPods fit terribly and don’t sound good, but they are very easy to use. If you want wireless, it feels like you have to eschew customization to find the perfect headphones for your ears.


But Shure’s latest Bluetooth adapter, the $150 RMCE-BT2 changes that for me. Shure headphones, including the affordable and lovely 215s, accurate if a little reedy 535s, and the chunky but perfect sounding 846s, all use the same little plugs when you’re connecting the buds to the cords. That plug, the MMCX connector, is commonly used across a range of earbuds besides Shure too. Campfire Audio, Westone, Massdrop, Ultimate Ears, and even Fender make in-ear monitors with MMCX cable support. In the MMCX system, you can just switch out the cable on your headphones whenever it begins to fray, or opt for pricy custom cables.

There are a couple of Bluetooth cables that connect to MMCX earbuds, including an earlier model from Shure (that’s still available for $100), but they’ve all had a problem: They’re trash. I’m serious. They’re buggy, with poor connectivity, or they store their Bluetooth radio and battery in a weird place that makes them uncomfortable to wear, or they just have terrible audio quality. I’ve used quite a few trying to turn my trusty 215s into convenient wireless headphones like those that Adam likes, but I can’t stand.

When the new Shure Bluetooth 5.0 cable came in, I was a little repulsed. It looks, at first glance, to be as ill-conceived as Shure’s last attempt at a Bluetooth adapter for MMCX headphones. There’s a little battery that dangles from the bottom of the cable with a micro-USB port for charging and a small clip to attach it to your coat or shirt.


I was positive this battery would catch on my necklace or tug the earbuds out of my ears or generally be irritating, but it hasn’t once in the last several weeks. And that includes the many, many times I forgot to clip it to my blouse for better security. It doesn’t allow for quite the same perfect fit as a normal MMCX cable though. I had to make sure the cables hooked onto my ears well otherwise the weight of the battery would eventually jar a headphone loose, but it’s better than any option I’ve used before.


A little further up one side of the cable are the controls and microphone module. The microphone works perfectly fine, with people hearing me (and my surroundings) quite well on phone calls. The center button, which lets you pause and resume playback, toggle the headphones on and off, and activate the voice assistant, is easy to use. There is a slight delay activating Siri via the button. The volume bumpers on either side of the center actually work—something that I can’t say about plenty of expensive MMCX cables I’ve purchased over the years.


There’s also a little blue light on the controls that flashes when the headphones are on. It’s bright, and at night it will briefly light up the back of a taxi cab you’re sitting in—to the point that it can be distracting and you’ll want to tuck the cable into your collar to avoid it.

But the adapter’s Bluetooth powers are its strongest feature. It’s upgraded the Bluetooth 4.0 of the previous generation’s cable to Bluetooth 5.0, and that results in a rock solid connection that never craps out in big open parks. The RMCE-BT2 also supports a variety of codecs, including aptX for better fidelity, and while some might complain that Bluetooth can’t compare to some high priced cable, they sounded perfectly fine for me. This cable is for making headphones more portable and letting you wear them on the train or for a bike ride or at the gym, not bragging about the kind of wires packed inside.


The $150 asking price might look steep, particularly when you consider AirPods cost just $10 more, but the AirPods sound like a train station intercom system compared to many of the headphones the Shure RMCE-BT2 Bluetooth 5.0 adapter works with. This cable is about customizing your current set up, and for people who care about audio, it’s been a long time coming, and very welcome.



  • It supports all earbuds with an MMCX connector.
  • It works better than any other MMCX Bluetooth adapter on the market.
  • The cable’s little battery looks dorky, but it actually isn’t obnoxious to wear.