Oh yes, sorry, completely forgot that
I received at the same time as with my TY Hi-Z 32 ohm and the 32 ohm PET drivers tjhat were recommended by
@HungryPanda (thanks to that!)
So I will make two reviews instead of one
15.4mm 130 ohm beryllium drivers :
They are for now my new favorite/reference and king of any drivers I found for now since I DIY. I just ordered a backup pair since few days already.
The sound is exceptionnal, truely a "TOTL" one, many DIY potentials with some kind of shell mods.
Sound is extremely transparent, fun and natural, with a nice touch of warm. Thanks to its dark (not cold) presensation, the soundstage is incredibly deep (and large when it needs to be), instrument separation at its top notch level.
Details are extreme with a rare kind of precision (I keep rediscovering all my tracks with them, this is the first time I feel that on a DIY earbuds).
Bass is punchy with nice mid-bass presence, sub-bass rumble has the right amout without beeing overwhelmed (maybe some will find this part lacking), mids are just insane (vocals singing just in front of you), never enjoyed that much from any earbuds I listened I think. Highs are never sibilant nor harsh, the tune is exceptionally good, they achieved micro-details without any listening fatigue at all (for me it is a crucial point). Good drivers always need to be like that in details/highs area, this is the way you recognize good drivers.
Brillant tune and build quality done on these drivers. Highly recommended! (I recommend to buy on Chitty's store as they do excellent shipping packages, never disapointed until now).
I would say.this is the kind of drivers that hurts a lot "TOTL" already-made eaburds over 200$+.
They are now included in my new best 15.4mm DIY project (which I recently added a good looking Y-splitter) :
15.4mm 32 ohm PET drivers :
They reached directly my second best drivers to date and they just beat my previous 150 ohm 15.4mm reference that I recommended few pages back.
They are overall performing very good for a 32 ohm drivers.
Just had to re-work the cotton tuning a bit as they were a but loose or badly placed on my received units.
Good bass, mids too, but highs a little crispy sometimes, so I just have to fine tune that with some shell mods later.
They are very transparent and natural sounding too. Good details too (but I don't rediscover my tracks like on the 130 ohm beryllium).
They could be good drivers for mid tier level I would say.
Will share later some photos of my DIY buds equiped with them
Cheers'