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Motorola S11-FLEX HD Review


Posted: , by John V.



Motorola S11-FLEX HD Review
When it comes to using this for phone calls, it’s passable, but far from the clearest thing we’ve heard. On our end, we didn’t have too much of an issue trying to hear out our callers, as the volume output is loud enough to audibly comprehend voices. Conversely though, our callers mention having more difficulty due to the muddy tones they’re presented with on their side. And if you’re concerned about background noise, the noise-cancellation feature of the Motorola S11-FLED HD kicks into high gear, as it’s able to quickly drown out background disturbances, such as the wind coming from an open window, so that our voice is the sole thing heard on our caller’s end. However, it’s not without some distortion muddying up its quality, seeing that voices become a tad bit hollow in tone as a result.

Showing its worth, we’re pleased that that the Motorola S11-FLEX HD is a great pair of wireless headphones for listening to music. Yeah, it doesn’t have any cool noise isolation feature or something similar like that, but we’re happy to report that the audio quality produces brilliant high tones and the perfect splash of treble – well, that’s as long as you’re using the appropriate equalizer setting. Specifically, it features balanced, extreme bass, vocalizer, brilliant treble, and unmodified settings to better adapt to the style of music you’re listening. Of them all, we have to say that brilliant treble coughs up the most balanced performance out of the bunch, seeing that it sneaks in a snippet of treble to give its quality some brilliance.


Rated for 7 hours of talk time, 6 days of standby, and 6 hours of music playback, we’re able to inch out a little over 5 hours listening to music consecutively. Interestingly enough, the Motorola S11-FLEX HD is quickly recharged in no time at all! In fact, 5 minutes of recharging its battery yields enough charge for 1 hour worth of usage. Keeping that in mind, it doesn’t take that long at all to get this pair back up to full capacity.


Flaunting an MSRP of $129.99 a pop, it doesn’t really come as a surprise, mainly because it follows in the same footsteps as its predecessors. Surely, its sport-minded design is perfect, seeing that we’re not left to fumble around with wires slapping our face as we’re running outdoors at a vigorous pace. At the same time, the sweat-proof aspect is a nice touch to an already athletic minded pair of wireless headphones. However, it doesn’t jump out in the call quality department – though, to its credit, it’s wonderful for listening to music. For all its worth, though, we were hoping to see some other neat features that we’ve been seeing on other wireless stereo headphones , such as the noise-isolation technology used in the Phiaton PS 210 BTNC. Then again, it would’ve more than likely increase its cost, so for what it’s worth, it’s not a bad option at all when you take into account everything it has to offer.

Motorola S11-FLEX HD Video Review:


  • Great to use for physical activities
  • Brilliant audio quality with listening to music
  • Sweat-proof aspect
  • Fast recharging time


  • Muddy call quality
  • Difficult to make out its buttons
PhoneArena rating:
8 Good
User rating:
Not rated

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posted on 02 Jan 2013, 03:33

1. Nathan_ingx (Posts: 4280; Member since: 07 Mar 2012)

It looks like Cyclopse in the X-men would wear this...if it's the other way round. Back to the front!
"...our callers mention having more difficulty due to the muddy tones they’re presented with on their side."...i would blame this to the mic since it's not directly in front of the mouth.

posted on 05 Jan 2013, 19:24

2. davin8r (Posts: 45; Member since: 28 Apr 2011)

Love mine!!

posted on 28 Jan 2013, 14:51

3. tcbmaki (Posts: 2; Member since: 28 Jan 2013)

sorry, I don't get this contraption? didn't Oakley try coming out with some all in one sunglasses deal like this once? to much crap hanging around my neck.

posted on 25 Mar 2013, 08:18

4. nyc_rock (Posts: 13; Member since: 04 Feb 2010)

Just picked these up. Used for a 5 mile run and a 4 mile run. Perfect! They fit very well, not loose at all. I would recommend for anyone looking for a good workout headphone.

posted on 25 Oct 2013, 12:31

5. rommelandriotti (Posts: 1; Member since: 25 Oct 2013)

I was about to buy the S11 - Flex when i heard about the "crack on the band" issue. I would like to know if it's true that this does not happen with the s11 HD model (not flex). Other people say that a new Flex model has been released and solved the problem. I would like to know which is the best model, and how can i recognize it.

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