Seeing the values it seems they follow the unfortunate trend of producing overly sensitive IEMs.
At 19Ohm and 116db SPL this might be a hiss magnet. Don't understand why most makers are jumping on that train. There is no need for more than 100db SPL. 

@BartSimpson1976 it has a lot to do with the models of ba drivers used and the electrical configuration (series or parallel) between the different drivers. Some ba drivers are inherently super sensitive, others are less. The final impedance and sensitivity figures are the result of all these factors plus many more. What I am essentially trying to say is manufacturers don't necessarily choose a sensitivity value and then design based on that. Its the other way around. Its possible to reduce sensitivity by adding resistors but it can potentially have side effects on the sound output.
 
Regardig the Samba, it is on the sensitive side but not necessarily a hiss magnet. Except for the Cayin i5 all other sources I have tried were reasonably silent with the Samba. 

Glad to see your review! Do you have any plans to include comparison section in future? Your inventory is impressive and it would be interesting if you could do comparisons with other high end stuffs from your collection. 
 
Cheers!

@omastic 
 
Thanks for the explanation. Bad thing that Cayin i5 is exactly the DAP I am using....
Well, the Jambas anyhow not in my price range, however the Jomo 5 and 6 have similar values.
Seems about time to check out whether the ifi ieMatch can hold up to its promises....