CNET también está disponible en español.

Ir a español

Don't show this again

Boomgear SX-900S review: Boomgear SX-900S

  • 1

The Good Ultracompact and comfortable.

The Bad Terrible sound; no carrying case or extension cord included.

The Bottom Line These comfortable buds have one unfortunate downside: they sound pretty bad.

Visit for details.

5.8 Overall

BoomGear SX900S

The BoomGear SX-900S ($39 list) earbuds provide a better-than-average fit by incorporating tiny drivers coated in flexible earpiece pads that form to your ear canals. There's just one problem: they sound terrible.

Another drawback: Despite a relatively high price tag and a tangle-prone, dual-sided cord, the SX-900S doesn't include a carrying case. BoomGear does provide two sets of the interchangeable earpiece pads in slightly different sizes; both sizes fit this reviewer's ears well. Although the 2.5-foot cord is shorter than most, it is just long enough to connect with a portable MP3 player in your pants pocket (if you're of average height).

On a more positive note, the buds fit snugly and comfortably during a 30-minute treadmill run. By comparison, it's virtually impossible to exercise with loose-fitting, standard earbuds such as Sony's MDR-E827G ($19.99 list). It's also worth noting that the SX-900S in-ear drivers did a fairly effective job of blocking out background noise.

Featuring 105dB sensitivity, the SX-900S was capable of playing loudly even when driven by an underpowered portable MP3 player. BoomGear marketing materials claim the SX-900S has "built-in subs for extra bass," but don't be fooled by the hype. When we fired up bass-intensive tracks such as Paul Oakenfold's "Essential Mix at Home in Ibiza," there was little low-end presence. Even worse, midrange frequencies sounded grainy and out of balance with the painfully brash treble. What's more, vocal parts displayed unmistakably whiny, headache-inducing midrange resonance.

In the final analysis, the SX-900S delivers excellent style and comfort, but falls far short on performance. Sony's MDR-EX71SL ($49 list, but widely available for $29) earbuds have a similar physical design, but sound much better and include an extension cord and carrying case. Unless you really don't care about sound quality, opt for the Sony instead.

Best Headphones for 2020

All best headphones

More Best Products

All best products