This is Treblab’s true wireless sport earbuds featuring IPX4 rating, meaning it is water and sweat proof. The package comes included with the charging case and cable, total 6 pair ear tips sizes (3 silicone and 3 foam) and 3 ear fins sizes. The combination of foam eartips and earfins is superb for sports and full running, shaking your head like 9 magnitude earthquake won’t make it fall of anytime, but maybe your head first.

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To power on the earbuds, you have to take them off the case and place it in the ears then press the two top most buttons. The button on each button are multi-functions, but you’ll master it within 5 minutes. The passive sound isolation is good thanks to the long sound tube length that goes deep into the ear canal.

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It’s powered by pair of 8.2mm Beryllium Dynamic Drivers. I have to stop here and note that beryllium driver are rare to find in the market due to high cost and miracle that is available even in a sport wireless IEM like this, its the first for us. Beryllium is stiffer (for the strength diaphragm) so it doesn’t produce unwanted vibration that cause audio distortion at any frequency. At the same time being highly responsive when it comes to reaction time (thickness of diaphragm). It uses Bluetooth 4.2 for connectivity. Maximum stable line of sight connection is 11 meter.

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Earbuds in the casing

The rated battery life is 6 hours for the buds when use together. Our battery is based on the iPhone 6 at the 4rd volume bar.
1st (The pair together): 4 hours 35 minutes
2nd (1st box):  4 hours 25 minutes
3rd (2nd box): 4 hours 30 minutes
4th( 3rd box):  2 hours 50 minutes
Total: 16 hours 20 minutes
Earbud one side: 5 hours 30 minutes

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Battery indicator and charging port



Technical Specification

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  • Playtime: Up to 6 hours, +4 additional charges with Charging Case
  • Charging Time: 2 hours
  • Battery: Earbud (each): 75 mAh, Charging Case: 600 mAh
  • Bluetooth: 4.2
  • Signal range: 33 feet / 10 m
  • Frequency response: 20 Hz – 20 kHz
  • Driver: Beryllium, 8.2 mm diameter
  • Water resistance: IPX4
  • Phone Calls: Built-in mic
  • Color: Black
  • Voice assistant: Siri, Google Assistant
  • Earbuds (each) Dimensions: 34 x 12 x 37 mm / 1.34 x 0.47 x 1.45 in
  • Charging Case: 68 x 50 x 22 mm / 2.68 x 2 x 0.86 in
  • Earbuds (each)Weight: 7 g / 0,25 oz / 0.015 lb
  • Charging Case Weight: 21 g / 0,74 oz / 0.047 lb

Audio quality

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POP/EDM:

Tiaan – Be Ok (Low bass frequency)

Low bass frequency is superbly energetic and superbly notable, you can feel the air pressure booming in your ears. It doesn’t eat into the vocals and has zero bass distortion. The subtle bass vibration fades smoothly. Low bass frequency is well bodied. The low bass slightly overpower the vocals, just a tiny bit.

Pia Mia – Do It Again (standard bass)

Bass is highly energetic and firm, you can feel the air pressure. The bass fades butter-smooth with a long drag especially at the 2:05 mark, the vibrations is just eargasm and one of the best in our channel. Bass slightly overpower vocals, there clear separation between the two. Bass is well bodied. EDM tones sounds fun and exciting.

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Foam and Silicon eartips

Vocals/Instrumentals:

Violinder – Raindrops (instrumentals)

Piano/Violin tone sounds right and natural, leans closer to the crystal-clear type not the warm-sound, I prefer crystal-clear type. It has right amount of shine at the highs. Tone are well bodied doesn’t sound half-hearted.
 Bass/Drums feels balance with Piano/Violin in term of audible levels, sometime the piano/violin is slightly notable, there is clear separation between the two. Good indication of a balanced IEM.

Pentatonix – See Through

Mitch Grassi’s high-pitched-male Tennor vocals perform very well at the highs with the right amount of shine, feels bright. One of the best we have heard on a true wireless earbuds. Each singer can be identified easily. Every diction and pronunciation is crystal clear. Vocal beatboxing, echoing and humming is eargasm which doesn’t overpower Mitch Grassi’s vocal in the song.

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It is not easy to find a Sports True Wireless Earbuds that performs well throughout the range from the low frequency to the high frequency. A great improvement from the Treblab X11 that we review in the past and can closely rival the Sony Wireless IEM like the Sony WI-SP600N and Sony WF-SP700N. I don’t mind a slightly larger charging case if they can bump up the battery capacity to keep me going longer. The Beryllium gave this X5 the edge to outmatch most of it competitors.

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