I just received a review unit of the SMABAT M2 Pro. This little earbud packs a ton of innovative ideas with regards to customizing its sound signature (see below).
It comes with a silver plated MMCX cable, very well braided and of high quality. MMCX are easy to connect and disconnect (I know the first batch of SMABAT ST10 has MMCX issues). Like the predecessor SMABAT models, this M2 Pro can be worn over ear or cable down, and is light and comfortable.
It comes with a silicone cover and full foams. I find the full foams gives a warmer sound (though with slight loss of details) whereas the silicone covers makes the sound clearer and brighter with better microdetails. The upper mids/lower treble can get a bit hot with the silicone covers though, but I'm treble sensitive, so YMMV, and the basshead in me prefers the full foams.
So with regard to customizing the sound signature, other than the full foams vs silicone covers influencing the sound, the sound can also have multiple permutations:
![Capture1.PNG](https://www.head-fi.org/attachments/3671537/)
It comes with 2 pairs of tuning modules in the box (the white circular thing in this picture). There's an option to get 3 aftermarket dome units/drivers (these are not included in the box and can be purchased separately).
![Capture2.PNG](https://www.head-fi.org/attachments/3671536/)
The default tuning module which is preinstalled gives the sound a neutralish bright sound signature. Upper mids/lower treble are within my tolerances with full foams, but can be hot with the silicone covers. Bass is quite neutral with this on.
![Capture3.PNG](https://www.head-fi.org/attachments/3671535/)
There's another pair of tuning modules in the box (the dot is very very tiny and easy to miss), but with this tuning module on, it gives the sound a mild V shaped tuning. I installed this module cause I like my bass, but even with this, the subbass is a bit anemic much like most other earbuds. Don't be expecting SMABAT ST10 type subbass. Slight midbass bleed present but I like the added warmth in the lower mids with this module on.
See this video on how to install the tuning modules:
Now to complicate matters, there is an option to install different driver units for the M2 Pro. The M2 Pro's Stock driver is a 15.4 mm dome titanium driver, but one can buy aftermarket full sized titanium unit, dome titanium membrane or even the ST10S black gold driver (these are not included in the box and u might need soldering skills to install these) (they can be bought from the SMABAT Aliexpress shop separately, details below in the pictures).
U can see this video on soldering and installing the driver units:
I think the SMABAT M2 Pro may indeed be the first earbud to incorporate this modular concept for different tuning modules and driver units, it would make DIYers very happy and give a wealth of tuning options, in addition to using the silicone covers/full foams. Sound quality is very good for a midfi earbud too (though the basshead in me would have liked more subbass). Timbre is great like other buds, vocals sound great without being overbearing on the tuning module type 1. Will do some burn in and leave a formal review soon.