I bought both these and the "HD1 free" at the same time. My main exercise where I'd use headphones is walking outside; I have decent equipment indoors where I can just use a speaker, and running IMHO is just a good way to get hurt.
The sound quality on the HD1 free is better; we'll just get that out of the way first - those things are absolutely phenomanal earbuds. But the HD1 cord is longer and they don't fit as snugly in my ears. As a result, while I'm walking around town, turning my head to cross the street, they would get pulled out just slightly. Without the seal, earbuds suddenly sound really hollow.
These CX1s, though, are great. They sound /almost/ as good as the HD1 free, which means they still sound better than whatever you probably have now. They really do sound very good; they're an outstanding earbud. I'm keeping them because they really do work better for "active" use. They're lighter weight overall. The buds are somewhat smaller and the cord is shorter. Looking at them, you'd think those were really minor changes, but they feel substantially lighter weight overall. Combine that with the silicone "wings", and these stay put exceptionally well. They come with four sets of "the thing that plugs your ear canal" and three sizes of wing, but, as a "borderline-large guy" (6'1"/225), the default size-3 cushions and medium wings (as-shipped) fit me perfectly. I did run and jump some with them in, and have spent several hours walking around town, which involves a lot of "look both ways before crossing" head motions that usually pull headphones out. These things stay exactly where I put them. They block out darn near all outside nose in a small town, so they're honestly probably not super safe to wear in high-speed traffic - but I'm in a village where there's basically no cars driving around. They'd be great in a gym, and I've been using them at my desk occasionally (though my PXC-550 headset gets more use when I'm sitting down).
The thing about these (actually both) which I'm most impressed by, aside from the sound, is the bluetooth range. I use some 3M worktunes over-ear hearing protection while I'm mowing. They also use bluetooth. I noticed that the sound would pause when I'd pass in front of my front door. After the fourth or fifth time, I looked at the bluetooth settings, and my phone was connecting to the CX1 sports. I had forgotten to turn them off, and left them on my kitchen table. In the house, over 50 feet away, though two doors. The signal was strong enough and these connect fast enough that they were reconnecting to my phone in my front pocket on the opposite side of my body. I had to go inside and turn them off. It goes without saying that I've not had any trouble with them disconnecting from my phone regardless of where I carry it. You wouldn't have to keep your phone on you while working out, as long as it's in view.
Re: the yellow, I wasn't initially a huge fan. But I've decided I like it for two reasons. One, it makes them easier to find in a dark bag or whatever, and two, it's just enough that people around can actually tell you're wearing headphones. since these block out external sound so well, it's nice not turning around and realizing that someone's been talking to you for who knows how long without you hearing a word.
In short, I love these things for any time I'm moving around; they stay in and sound really really good. And the HD1 free? My wife ended up keeping them, because she didn't have a particularly good set of headphones. So, we both win. :)
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From the manufacturer
Sennheiser is shaping the Future of Audio – a vision built on a 75-year history of innovation and a continued drive for excellence that is woven into our company’s DNA and culture. Around the world, our employees share this passion in the pursuit of the perfect sound, creating products that exceed expectations and set new benchmarks in audio.
Meet the Sennheiser CX SPORT Wireless Earphones
Made to Move
Like an athlete who makes every movement seem effortless, Sennheiser’s CX SPORT In-Ear Wireless headset elegantly balances purposeful design with exceptional audio performance. Lightweight, sweat and splash resistant, the CX SPORT can be worn around or in front of the neck. Six-hour battery life with fast-charging ability means the CX SPORT will be ready when you are.
- Experience the joy of movement with the Sennheiser CX SPORT In-Ear Wireless headset.
- Enjoy clear, dynamic sound with a satisfying bass response as you move. The lightweight, sweat- and splash-resistant design can be worn around the neck or in front.
- Operation is effortless thanks to the three-button remote for fast music and call management.
- With ergonomic fins to keep the earbuds secure, CX SPORT moves with your body as you move
Features
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Superior soundWhether you use music to power through a high-intensity workout or to maintain an efficient pace, the wireless CX SPORT is made to move you. Sennheiser engineering ensures clear, detailed sound with satisfying bass response. Qualcomm apt-X processing helps the CX SPORT deliver a High Fidelity audio experience wirelessly. Put the right sound in and get more out, every time you train. |
Exceptional fit and comfortEnjoy the freedom of wireless sound with uncompromising quality in a comfortable and ultra-lightweight design. Three sizes of ergonomically designed ear fins keep the earphones in place while four sizes of ear tips provide a customized fit. The adjustable neck cable with integrated clothing clip allows the CX SPORT to move with you. Hit the gym or take a run with Sennheiser sound complimenting your workout. |
Easy to useOperation is intuitive and effortless thanks to a slick three-button remote for music and call control. Control the volume or find your go-to power anthem without slowing down. Six-hour battery life means the CX SPORT will go the distance with you, and a ten-minute quick charge gets you one hour of playback when you need it fast. |
Sweat- and splash-resistantThe CX SPORT doesn’t want you to hold back. Move faster, move further, and feel free to turn it up. Made durable and tough with sweat- and splash-resistant materials, the CX SPORT will join you for an early morning run in the rain or a sweat-soaked gym session. |
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| CX 6.00BT | CX SPORT | HD1 Free | CX 7.00BT | HD1 In-Ear Wireless | |
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| Customer Reviews |
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| Price | $98.99 | — | — | — | — |
| Wearing Style | In-ear earbuds | In-ear earbuds with adjustable ear fins | In-ear earbuds | In-ear earbuds with neckband | In-ear earbuds with neckband |
| Compatability | Bluetooth transmitting devices | Bluetooth transmitting devices | Bluetooth transmitting devices | Bluetooth transmitting devices | Bluetooth transmitting devices |
| Water/Sweat Resistant | No | Yes | No | No | No |
| Frequency Response | 17 – 21,000 Hz | 17 – 21,000 Hz | 15 – 22,000 Hz | 17 – 21,000 Hz | 15 – 22,000 Hz |
| Sound Pressure Level (SPL) | 112 dB (1 kHz / 0 dBFS) | 112 dB (1 kHz / 0 dBFS) | 112 dB (1 kHz / 0 dBFS) | 112 dB (1 kHz / 0 dBFS) | 112 dB (1 kHz / 0 dBFS) |
| Battery Life | Up to 6 hours | Up to 6 hours | Up to 6 hours | Up to 10 hours | Up to 10 hours |
| Charging Time | Approx. 1.5 hrs | Approx. 1.5 hrs / 10 min for 1 hour | Approx. 1.5 hrs | Approx. 1.5 hrs | Approx. 1.5 hrs |
| Weight | 0.49 oz (14 g) | 0.53 oz (15 g) | 0.59 oz (17 g) | 1.69 oz (48 g) | 1.86 oz (53 g) |
Compare with similar items
This Item  Sennheiser CX Sport Bluetooth Sports Headphone |  |  |  |  |  | |
| Price | $88.99 | $19.95 | -29% $49.99 List: $69.99 | $39.99 | $69.99 | $115.00 |
| Delivery | Get it as soon as Sunday, May 19 | Get it May 20 - 22 | Get it as soon as Sunday, May 19 | Get it as soon as Sunday, May 19 | Get it as soon as Sunday, May 19 | Get it as soon as Monday, May 20 |
| Customer Ratings | ||||||
| Sound quality | ||||||
| Battery life | ||||||
| Comfort | ||||||
| Noise cancellation | ||||||
| Sold By | Buy Top Tech | Only1deal | DEZI-US | Litaier | Linklike US | Pro Wireless |
| connectivity tech | Bluetooth 4.2 | Bluetooth | Wireless | Bluetooth 5.2 | Wireless | Wireless |
| headphones form factor | In Ear | In Ear | In Ear | In Ear | In Ear | In Ear |
| connector type | wireless | wireless | wireless | wireless | — | 3.5mm Jack |
| noise control | sound isolation | active noise cancellation | sound isolation | sound isolation | passive noise cancellation | — |
| cable feature | Without Cable | Without Cable | Tangle Free | Tangle Free | Without Cable | Without Cable |
| control type | Media Control | Media Control | Volume Control | Volume Control | Button Control | remote |
| water resistance | water resistant | water resistant | waterproof | waterproof | waterproof | — |
Videos
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Reviews with images
One try and one hospital visit later...
I had PMX 686i sport earbuds that worked well but gave out just within a few months of going out of warranty. Because that model was discontinued, Sennheiser sent me the CX Sport headphones brand new. The CX Sport costs more than twice what I paid for the PMX 686i, so I figured I was getting a good deal.Wrong. I have to put the earbuds in pretty far (true of any earbuds with this design, not just these) for them to stay in longer than a few minutes. On the first try, not only did the right ear's earpiece tear off (see first photo) when I took it out, the earpiece managed to lodge itself in my ear. I had to go to a hospital to get it taken out (see second photo).Don't waste your money. I'm normally a fan of Sennheiser products, but these were an extreme disappointment.
Top reviews from other countries
Jorge Navarro
Sonido potente sin zumbido, resiste sudor como pocos
Reviewed in Mexico on December 15, 2022
Jorge Navarro
Reviewed in Mexico on December 15, 2022
Todos he tenido que aplicar garantía porque no me aguantan el sudor.
El único inconveniente que tenían para mí estos audífonos es que con el sudor se me caían constantemente en gimnasio y coincido con otros usuarios que puede ser muy molesto para los que están buscando audífonos que se queden en el oído.
Para mi la solución fue ponerme unas cintas Kinesiológica en el oído y me tapa completamente y no se caen durante mi entrenamiento ni cuando corro.
En lo personal para mí el sonido de Sennheiser CX Sport es muy bueno no molesta el oído ni tiene un siseo digital que muchos otros tienen por la digitalización excesiva de la señal.
no se puede usar con la aplicación de Sennheiser mobile control pero uso el ecualizador de Deezer en mi suscripción y sin problema.
El producto llegó original, en excelentes condiciones protegido con papel espuma, tiene su garantía de dos años de Sennheiser México y siempre me han respondido muy bien en compras anteriores, dan la cara por su marca. Es original y todo viene como se muestra en fotos.
Esta es la tranquilidad que un cliente debe sentir usando una aplicación como Amazon.
Images in this review
Ham ham
Great product and would definitely recommend
Reviewed in Australia on August 24, 2020Amazon Customer
Ne tient pas dans mes oreilles et la compagnie ne m'est d'aucune aide
Reviewed in Canada on April 8, 2022Cliente de Amazon
No los recomiendo por su baja calidad
Reviewed in Mexico on October 28, 2019