I personally preferred the BL03 to the ZSX once I put foam tips on the BLON. The ZSX was a little too shouty for me in the treble. They were a fun, energetic sound though with pretty good bass if I can remember correctly. I enjoy the overall signature on the BL03 more and I think they have more bass. The recs are really going to depend on @Andrea_Hasani’s budget. For under $50 I have heard good things about the Jade Audio EA3, specifically that they have good bass. Plus the total package is WAY nicer than the BLON. If you can go a little higher the Shozy Form 1.1 is nice, I’ve heard really good things about the Ikko OH10, iBasso IT03, and the ISN H40. They are all supposed to have pretty great bass but they are definitely in a different price bracket.
Sorry to jump in on this thread But could I ask about what tips you guys are using for the blon 03 please. I am struggling to get a good fit with these. Thanks.
It’s seems that many (maybe the majority) struggle with the BL03 fit.
Personally I am lucky, but still use foam as they are my preference for almost all IEMs.
Some people have made extensions, others use triple flange converted to double flange. I think Dekoni makes tips that extend the insertion depth.
For silicone tips I use Final E series. For foams I used Dekoni Bulletz. I’m not a big fan of foams personally but they sounded good with the BLON.
Thanks guys I’ll take a look.
I never had any issues with blon 03 (they fit perfectly for me), the only problem was the loose mmx connector with the cable I buyed (changed the stock one). Reason I lost one side.
I was thinking of investing up to 50$ maybe a bit more. Was thinking of getting the blon 03 and another pair (maybe kz zsn).
Mostly want a pair to give me something different from blon 03.
The BL03 use a 2 pin 0.78 connector, not an mmcx.
The ZSN are certainly different to the Blons. If you can find a good price, maybe you could find the BL03 and the T2 for around 50 to 60$. The T2 was on sale at 30$ recently. Those would give you the bassy signature of the BL03 and the more neutral signature of the T2.
I don’t have experience with the Blon 03, but my standard choice for ChiFi IEMs are New Bee foam tips:
These are both inexpensive and good for trial and error fitting. In my experience foam is far more forgiving than silicone (but doesn’t last as long). This version includes small, medium, and large, and the large tips are really large. They sell other packages with just a single size.
Those are also my tips of choice for most IEMs.
I bought these based on the recommendation made by a member on a spanish forum who had read a bit on the subject and found these to be often recommended and bought them himself, I can attest to them sounding great and the medium size fitting me almost perfect:
If you know your size the AZLA Sedna tips are well regarded though I have no experience with them:
I will grab the zsn and a pair of blon 03.
By the way what ali seller would you suggest I get the blon 03 from. I heard that people have gotten different sound signature blons 03 (different from reviewers)
I can’t help you there I’m afraid, I purchased mine from Amazon.
If I had to recommend a seller, I would say Linsoul as they are pretty serious and easy to deal with.
The middle pair on the right. If that helps any one:)
Lovely job. I have found some tips that came with my SoundMAGIC E10C There short and stout and have changed the sound of the blons so much. I was not getting a good seal as there was hardly any bass but switching to these tips have changed the whole sound for me.
Here is my own personal opinion of the Blon BL03. This review also forms part of Episode 1 of Acho Reviews on YouTube in case anyone wants to watch someone ramble on in Spanish 
BLON BL03 REVIEW
The Blon BL-03 are by no means a recent release, at least at the speed that Chinese IEMs are released. However, they seemed to get a lot of praise (maybe too much) so after not purchasing any IEMs since the ZS10 Pro (or was it the ZSN Pro?), I decided to give them a try and see what the hype was about.
I purchased them a couple of months ago but due to the Covid issues, they went around in circles for a while, with me even cancelling the order at least twice but they still showed up in the end, and to be honest I am glad they did so that I could form my own opinion.
I purchased the version with a microphone as it was actually cheaper than the version without and after checking them out online, I had already come to the conclusion that I would be changing the cable anyway. The connectors used are 2 pin 0.78mm so I swapped it out for a balanced cable from NiceHCK.
The shell of these IEMs is made completely of metal, however, they are not heavy, weighing in at around 8g per side.
The finish seems to be well done and gives them an impression of costing more than they actually do (they cost 30€ here on Amazon).
Normally, I will only use foam tips on the majority of my IEMs barring a few exceptions. This is due to personal comfort and I am willing to sacrifice whatever I may lose due to the foam in exchange for the comfort. I actually found them quite comfortable with silicone tips although I did have to mess around to get the left side to seal properly but once I swapped over to foam tips, these issues disappeared.
I have read many people that find find the BL03 uncomfortable, due to the short insertion, in my case I must say that I do not have this problem. In fact, I find them to be very comfortable, probably one of the most comfortable IEMs I have tried to date.
Their sound is slightly V shaped, well, it is actually sort of between a V and an L, which I guess is a signature that appeals to more people interested in IEMs at this price.
The bass is very present, although not excessive in my opinion, but it does have issues that I will mention in a moment.
The mids, although slightly recessed, in their higher part resolve pretty well.
As for treble, again, it is there but doesn’t present too much sibilance, at least in the majority of songs.
To give a brief recap on what I found while listening to these, I will break it down into music
categories rather than specific songs, as I found that they remained very similar while playing songs of the same type.
EDM…
Let me start by saying that I am not much of an EDM listener, however, when I first tried the BL03 it inspired me to listen to some EDM.
The majority of songs were from a few years ago (2015-2018) and I couldn’t give you names as I just put a random list on Tidal and let it play.
With this genre, I found the Blon to defend themselves pretty well, with very present bass, without being excessive, and good clarity in the treble. I think that the sound signature of these IEMs works well for this type of music, although some songs that were more vocal centric did show up the recess in the mids.
Hip-Hop…
This is a genre that I listened to a lot until 5 or 6 years ago. I have a few albums that I like to use to test headphones and speakers, being “2001” by Dr.Dre and “All Eyez on Me” by Tupac.
The first album, 2001 by Dr.Dre, I started listening to without really noticing any issues but the longer I listened the more I started to feel that the bass and lower mids were colliding and creating a sensation of being congested and even dirty sounding. When not paying much attention they were acceptable but as soon as I focused on the music, the whole of the lower mids seemed to get more and more congested.
Moving on to the All Eyez on Me album by Tupac, I noticed the exact same issue as with the Dre album. Again, the lower mids seemed to suffer from a bleed from the bass, but on top of that, the whole lower mid range just sounded congested and lacking clarity.
Acoustic…
Moving on, I am a great lover of acoustic music, mainly while I work. I am referring to songs that are mainly based on spanish guitars, acoustic guitars, vocals (mainly female) etc.
Here I didn’t notice the issues I found with Hip Hop. I think that due to the separation of instruments and the songs not being as busy, it did not congest the lower mids as much.
In fact, the sound of guitars, acoustic bass etc. is very pleasant. I wouldn’t say that they have perfect timbre but the stringed instruments sounded very real and full of life.
Sometimes songs that have a larger amount of instruments, particularly when piano is involved, the lower mids can again feel congested but nowhere near to the extreme as I found with the hip hop albums I mentioned.
Voices are clear and natural sounding, at least to my ears, and I actually enjoyed listening to acoustic music on the BL03 while working. They are by no means perfect for this genre but I needed to focus on the music of songs I have heard many times in order to pick the faults.
Modern pop…
Due to their V shaped signature, ok, L shape, without being overpowering, I am sure that many will love these for modern pop, and I must say that I am quite happy with them myself.
I think these adapt quite well to modern pop although I find that they do much better with female vocals than male vocals, especially deep male vocals, mainly due to the congestion in the lower mids that I have already mentioned.
Measurements…
On the graph you can clearly see the V, ok L, shaped signature that the BL03 have and how the bass is elevated. To be honest, the graph shows the bass to be more exaggerated than it really is, at least to my ears.
If we compare them to the ZS10 Pro, an IEM that I have listened to a lot and holds its own pretty well (especially with a little EQ), we can see even more the elevated bass that the Blon has.
*These measurements are taken on my own sistem that is in no way calibrated to match the systems of any other person. My measurements must not be compared to any other measurements taken on any other system and are only presented as a guide to compare between different IEMs I have measured. For more info on how I do my measurements, you can visit this link: https://achoreviewsenglish.blogspot.com/2020/06/acho-reviews-measurements.html
Conclusions…
For me they are a very comfortable IEM, although I know I am a minority.
The imaging is pretty acceptable although soundstage is not the widest, but it is difficult to find a good soundstage in IEMs in this price range.
The timbre is good, particularly on stringed acoustic instruments, although I did find the Cajon and similar percussion instruments to sound a little off at times. This is noticeable on songs like “La Luna” by Ottmar Lieback and Luna Negra, where the space between instruments and their placing is good but the timbre of the cajon can sometimes seem a little strange.
With songs that have a lot of movement in the bass and lower mids, the congestion in these frequencies presents itself again and again. It is very noticeable in songs like “Black Muse” by Prince.
On simpler songs, where these frequencies are not saturated, they respond quite well and I don’t feel that it is an excess of bass or even the bleed that causes it, I think that it is there lack of speed for resolving the different instruments that share that same sonic space.
The majority of my time listening to the Blon BL03 has been with the Shanling M2X (balanced) and a few hours on the JDS Labs Atom for analyzing purposes. I did, however, run them from the Loxjie P20 (fed by the SU-8) and really enjoyed them as background music while working. Admittedly, I wasn’t really focusing on the music but I had them for periods of 4 and 5 hours without complaints (mainly acoustic music).
I think that for the 30€ they cost me, they are certainly worth it. They have their issues but they also have their strong points and luckily one of them is with one of my preferred genres.
Great review! Very thorough and well written. 
Excellent Writeup/Review. Really enjoyed reading it.
So guys, update: I’ve eventually bought the Final Audio e3000 with microphone. They arrived yesterday and I wanted to give you my impressions after a few hours of listening.
Two words: MAMMA MIA! They’re tiny and extremely light and it feels like you have nothing in your ears at all. Obviously the right earpiece feels a bit heavier due to the microphone, but the difference is basically non-existent. The sound is so detailed, clean, profound and pretty balanced, with only the mids a little bit recessed but not that much: voices, guitars, trumpets etc. are great. I suppose after the burn in the sound will “open up” more in this sense. For now I just slightly gave some boost with the EQ on mids/high-mids, but a very small one to suit my likings more. The bass is definitely there: it’s perfecly controlled, punchy, detailed and not overwhelming at all. No sign of harshness whatsoever and lots of details in the treble also. Instruments separation is excellent, while the image and soundstage are just incredible. It’s like having a 7.1 surround around your head. To give you an idea of the space it produces, it’s like being live at the Nirvana Unplugged (and in fact that sounds amazing). You can pinpoint every instrument in space and doesn’t get muddy even with lots of them, on the contrary: the more, the better.
The only downsides compared to the Sony I’ve been using are the cable, which seems flimsy (especially the bit connected to the actual earpiece) and noise isolation: it’s decent, more than enough for me, but not that great. I listen to music on my laptop at home and voices or tv are present, but once the music starts, unless it’s a calm music, they’re 99% gone even at a normal volume. I’ve changed the medium tips with the large ones (there’s also the XL size) 'cause they fit better in my ears and it helped a little bit. Anyway if you’re planning to use them in crowded places, you might have issues with this. They’re also a little more prone than average to sound leaking, but unless you turn the volume up a lot it’s not that bad (not as bad as your ears, in this case 
).
Compared to my uncle’s Sennheiser 5.00 the bass is more precise, mids are less recessed, the sound is warmer, there’s more detail overall, a better stereo image and definetely a bigger soundstage. Sound isolation and leaking is worse here also.
The microphone, well… is a regular microphone: it does its job, nothing to say about it. It has one button to play/pause and skip tracks and that’s it.
In general I’ve discovered new sounds in almost every song I’ve listened to. Kanye’s “Black Skinhead” is almost a completely different song from the one I knew; Michael Bublè’s “Moondance” is live at my house; you can hear every single bit of sound in every Depeche Mode’s song; Led Zeppelin, Springsteen, Foo Fighters, Aerosmith, Korn, AC/DC etc. are just “full”. EDM, hip hop, trap, pop, rock, metal: everything sounds just like it should.
It’s an IEM that follows songs: it takes the best out of them, it doesn’t impose its signature. Honestly: I have no idea how they did it at Final, but they put all this in such a tiny aluminum body with just two 6.4mm drivers. And it costs 50-60 dollars/euros. I don’t know how Tin or KZ/CCA IEMs sound, but man this is… Mamma mia!
Nice to see you are happy!
This is what it’s all about! So glad you are enjoying them!