Astrotec GX-50

General Information


> 20 special procedures for processing high-density glass, top diamond cutting process
> 38℃ ergonomic gold bevel design, comfortable to wear out, to achieve the perfect sound effects
> A second clear detail-rich, immersive scene like experience
> Imports of gold-plated connectors, MMCX standard for line, over million times plug test, durable
> KEVLAR fiber material resistant to pull winding, military-grade quality double protection.
>Low impedance high sensitivity, easy to show a good voice, masonry element package highlight the taste

Latest reviews


Pros: Sound, Design and Build quality, Bass
Cons: Highs, Clarity

Let’s get something out of the way from the get-go. The Astrotec GX-50 in-ear Speakers are a great pair of in-ear headphones for the money — and decent headphones period.


Astrotec GX-50 Specs:

Drive Unit: φ9.0mm Dynamic

Impedance: 16OHM

Plug: φ3.5mm

Rated Power: 3mW

Max Power: 10mW

Frequency Response: 12Hz – 25000Hz

Sensitivity: 104dB/1mw (S.P.Lat 1kHz)

Cable: 1.2m ± 0.3m PU

Colors: Athens Black / Dream Blue / Crystal Purple / Jewel Pink / Space Grey / Neptune Blue








Well, for starters, they’re well-built and have a design that’s not only fashionable, but also looks and feels like it will hold up well over time. The back of the headphones’ earbuds are crystal glass which has been shaped by diamond cutting techniques.





The earbuds fit well (you get a few different size ear tips) and the bendable nature of the cable conforms nicely to the contour of your ears. With this type of in-ear headphone, it’s important to get a tight seal because you lose a lot of bass if you don’t (and one of the appeals of this headphone is that it does offer a whole lot of bass).

The GX-50 is relatively comfortable to wear, you won’t feel the burden on your ear until a few hours after you put it on.




I spent some time comparing this model to the Monster Turbine, which I liked a lot and carries a street price of around $180. In terms of design, it’s hard to declare a clear winner. Both are designed to woo users who actually care about the look of their headphones. With that said, there are things I like more about the Astrotec GX-50 and things I like more about the Monster Turbine, I assume it all comes down to personal preference.




The one thing missing for on-the-go listening is a built-in microphone and in-line remote for making cell phone calls. But this set is more designed for purists and it doesn’t have any extra bells and whistles.




Clearly, the high-profile design isn’t really for everyone, but those who do appreciate fashion would instantly fall in love with it.






I thought the sound quality was quite decent for a pair of in-ear headphones, particularly in this price range. I ran an eclectic mix of music through them and the Astrotec GX-50 sounded really nice with everything I threw at them. They’re clearly designed to play well with just about any kind of music — or movies and games for that matter. Like higher-end headphones that cost much more, these headphones make you want to go back and listen to old songs in your music collection that you haven’t heard in a while just to hear what the headphones can bring out in the song. As I said, there’s lots of detail; the sound is rich, refined, and open for closed-back headphones.

Compared to the Monster NErgy NCredible, the Astrotec GX-50 headphones also play a little louder and offer slightly fuller, more detailed sound, with deeper, better defined bass, which gives it a more exciting sound. That said, it is a little warmer headphone and may be more pleasant to listen to for some people. The Monster NErgy comes across as a more aggressive, forward headphone, and is going to be a better match for those who listen to more hip-hop and techno music.

Take Ed Sheeran’s “X” album, even on CD it can sound aggressively harsh and grating, but here on the GX-50 the grit subsides and the music sounds better for it. The softening doesn’t totally rob better sounding recordings of detail, and the sound is plenty of energy and texture. The GX-50 sound best played fairly loud, and that’s when you really feel that deep bass massaging your eardrums.

Playing Alicia Key’s “Brand New Me” (192KHz/24bit), The sound from the earbuds of the Astrotec GX-50 has an extra deep and thumpy, but not overwhelming bass. Despite the heavy low-end, the GX-50 also manages to offer an impressive amount of clarity, with crisp, shimmery highs. Also, mids are rich and buttery–just like we like them.

Satisfied with what we heard from the GX-50 on their own we switched over to the $188 Monster Turbine in-ear headphones, and we did notice some difference. The Monster Turbine has equally prominent bass fullness, but with a little more detail and texture. Cheryl Cole’s “Parachute” with its snappy percussion lit up the Monster Turbine, while the Astrotec GX-50 diluted details.

Although the Astrotec GX-50 doesn’t have the active noise-cancellation feature of the Sennheiser IE80 or the SONY XBA-NC85D, it still does a good job of passively sealing out the sound from the outside world. No, you don’t get the same level of noise reduction, but they’re a good alternative for people who are sensitive to the slight pressure of active noise cancellation.

Designed for entry-level listeners, the Astrotec GX-50 is definitely not the most accurate sounding in-ear speakers, but the sound is pretty well-balanced, and you won’t get anything less than you get from other similarly priced headphones.



In recent months we’ve tried quite a few quality in-ear headphones in the $100 price range: the Beyerdynamic DX 160 IE, Klipsch R6i and Sennheiser Momentum In-Ear, to name a few. The Astrotec GX-50 are right there in the mix. They are nicely balanced and offer impressive detail and good tight bass that’s ample but not overpowering. Also, there’s no denying the style and high-end feel of these nice-looking buds. Priced at $80 (Retail Price in China, in other countries prices may vary), they’re good value and well worth a long look, particular if you’re someone who doesn’t stick to a particular kind of music.

  • Like
Reactions: DanMar
Beautiful pictures! Also, I think you made a typo where you mentioned that the Sennheiser IE80 has noise-cancellation.
Interesting read as I haven't seen these IEMs before!

YoYo JoKeR

100+ Head-Fier
Pros: Sound Quality, Comfort
Cons: Build Quality, Value

Me: I am a 21 year old Engineering student living in a small town in India. I would like to call myself a music enthusiast, rather than an audiophile. I was inspired by music since childhood, and as the time passed, the passion of music grew in me, and that subsequently led me to join Head-Fi. Eventually, I found the pleasure of listening to music mainly by the HD600 and recently, by the seductive LCD2 headphones, and realized the true components of recorded music. I usually like to listen to Indian Classical Music along with Bollywood songs. My main listening genres include classical, vocal, instrumental, jazz and sometimes pop.



Intro:  Astrotec, otherwise known as Aspen Tsui Astrotec, was established in 2002 and is headquartered in Shenzhen, China. "Astrotec" stands for Astro (Sky) and Tec (Technology). Astrotec provided headphone drivers for other brands during its early years, and now it mainly manufactures its own IEM line. Astrotec got particularly famous after it rolled out its ‘AM90’ low cost BA earphones, which was well received by enthusiasts.


GX50 is Astrotec’s latest release, and was released in Jan 2015.



Specifications of GX50 as per Astrotec:


Driver unit: 9.0mm rare earth permanent magnet


Bandwidth Range: 12Hz-25000Hz


Sensitive: 104dB / 1mw (SPL 1 KHz)


Impedance: 16 ohms


Wire: 12m ± 0.3m PU cable


Plug: 3.5mm gold-plated


For-line interface: MMCX


Rated power: 3mW


Maximum power: 10mW



Let us proceed to the review part,


Packaging and Accessories: The GX50 arrives packed inside a small and sleek blue coloured cardboard box, on which features and other information have been mentioned upon. The GX50 housing shell is seen resting inside a transparent window, the rest of cable and the accessories are packed inside the pleather pouch. Nothing special to mention about, packaging does its job. However, I feel the GX50 packaging is quite mediocre, packaging technique is poorly implemented and users will have a hard time in pulling off the unit off the box.








List of accessories in the box, which include the following: 


Eartips: Plenty varieties of good quality eartips are included to fit almost any kind of ears; pair of foam tips are also included.  


Pleather Pouch: This pouch is supplied to protect and store the GX50.


User Manual & Warranty card: Contains instructions and other warranty information.


Cleaning cloth: To wipe or clean the IEM’s.



Design and Build: The GX50 has a fairly good overall build quality. The entire housing shell is made up of good quality fibre. It is designed to look like a gem or a precious stone. Nozzle is slightly longer, considering its shallow fit. The shell is a finger print and scratch magnet. Astrotec logo is printed on the rear side of the housing shell. Left and Right markings are easy to notice.






Cable has a very good build (better build than housings). It is light, flexible, braided and does not get tangled. Cables have almost zero microphonics. Cable slider is embedded inside the Y splitter. Plug is 180 degree angled and gold plated. The cable is remove-able type, and in the top portion there is a memory wire, which functions good. 








Connecting mechanism is a simple push and pull. However the connectors themselves are fragile, loose fitting and not confidence inspiring.There is a lot of room for improvement in terms of build quality.



Comfort:  Though GX50 did not excel in build quality, it is very comfortable to wear, is ergonomically designed, and its cable is light and memory wire does a good job. Their presence is barely noticeable after wearing them. GX50 particularly provides a good isolation, this will be a definite advantage for a traveller.


The provided ear tips are well designed and are ear-friendly. I can confidently say, these are very comfortable to wear.



Sound: As for the most important part, GX50 In overall, has a warm, intimate and closed–in sound character. Detail retrieval is fairly good.


Lows: are fairly accurate (a little loose) and strong; have a good impact.


Mids: sound somewhat artificial and un-natural, not at all appealing on vocals.


Highs: are smooth, not too smooth to cause a darkish impression and not bright to cause sibilance. ‘Just right’


Soundstage:  Closed in natural and circular soundstage. Instrument separation is not upto mark, overall feels congested. This, I believe is a cause for fatiguing listen.


Comparing the GX50 with S0, I feel the S0 definitely outperforms the GX50 in terms of sound quality (soundstage, neutrality, separation and imaging). The S0’s are also more relaxing to listen to; whereas the GX50 is warmer, intimate and closed in. The GX50 wins hands down in terms of cable quality, and ergonomics. The final sound (and comfort) of GX50 can be slightly changed by using different ear tips.The final sound (and comfort) of GX50 can be slightly changed by using different ear tips.



Amplification: The GX50 is fairly easy (not very easy) to drive. They will benefit from light external amplification. An amp like an Objective2 does increases the sound output audibly, the difference in quality is noticeable. Amplification factor is not very important, but cannot be ignored either.



Conclusion:  I was not quite satisfied with the sound presentation of GX-50. The build quality too did not live upto my expectations. For me,The only positive aspect about GX50 was the comfort offering. I feel IEM’s like Havi B3 might be a much better buy than GX-50.


The Pros: 


1) Comfort: GX-50 is quite comfortable to wear for many hours, owing to its light weight, good fit and ergonomics.


2) Sound Quality:  A warm, intimate character with good detail retrieval, but lacks soundstage, feels congested.


The Cons:


1) Connectors:  The connectors particularly have a very mediocre build, and may give away with time.


2) Value:  At this price point, there are much better performing IEM’s available (Havi B3, Brainwavz S0/S5, RE100, VSD3 etc)





  • Like
Reactions: altrunox and DanMar
I actually think that the build quality is quite good.
Agree, the one thing is that there are 15$ MMCX cables (USD$13.00 Item NO.: LN004992) from lunashops :)


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