In an earlier post I was on the fence on whether to jump on the Smabat M5 Pro Golden or not. My curiosity got the best of me and I bought them just before their crowdfunding period ended.
Here's a picture of the box. Smabat going radical with their packaging... The package graphics had me thinking they really upped the ante in the tuning of the M5 Pro Golden.
Open the box for a view of the cover insert.
Very nice faux leather felt lined case. 3 sets of full foams and the M5 Pro buds.
Braided cable terminated with 3.5mm SE plug and MMCX was inside the case.
Left - ST10S B&G 150Ω / Right - M5 Pro 150Ω. The ST10S is meant to wear over ear style and comes with a hook cable. The M5 pro is also meant to be worn over ear as well, but comes with a straight braided cable. I guess you can wear the M5 pro hanging down, but with them hanging down they don't sound right to my ears.
Note the orientation of the labeling. I thinks it's pretty clear Smabat designed the M5 pro to wear over ear style just like the ST10S.
I do like the M5 pro cable, but the braided cable is too thick and a bit uncomfortable for wearing over ear style. So I swapped it out with an over ear hook TRN cable. The TRN cable also has interchangeable 2.5mm Bal., 3.5mm SE, and 4.4mm Bal. plug ends. The 4.4mm Balanced plug is shown below, but for my listening comparisons between the ST10S and M5 Pro I used the 3.5mm SE plug since the ST10S cable is 3.5mm SE terminated.
First listening comparison was ST10S (fixed 150Ω driver) vs M5 Pro with M4-ST10S 150Ω add-on driver. Let me put it like this, in a blind test you might not be able to tell which set you were listening to. Having said that, there definitely is a difference in sound between the sets. Both have excellent bass extension and are "U" shaped in tuning. The main difference is the upper mids / treble. The ST10S has that 2k / 3k hump which sometimes results in some piercing high end. From what I'm hearing the M5 Pro body is tuned to control that 2k / 3k hump resulting in a much better and enjoyable upper mids / treble region.
Second listening comparison was ST10S (fixed 150Ω driver) vs M5 Pro Golden 150Ω driver. Even though both drivers are 150Ω, they are not the same. Well if they are the same drivers, they are tuned differently. It's like a night and day difference in how the ST10S and M5 Pro Golden sound. While the ST10S is classic "U" shaped tuning, the M5 Pro Golden has a very balanced tuning. While they do have good bass extension, the midrange and treble are tuned to bring out details without being harsh. Overall nice soundstage and instrument / vocals separation, but not over the top. The M5 Pro Golden are very easy to listen to for hours.
I think Smabat learned their lesson with the missteps of the M4 and rolled out a set of buds that are finally worth getting in the M5 Pro Golden.