Monkey Puzzle
100+ Head-Fier
Rah was a limited 200 unit run. So unless you manage to get a returned unit from IMR site as b stock or getting a used one, youbare out of luck.
Same goes for R3 range. If you read page 1 main descriptions you will see the quantities mentioned.
Halcyon was reduced to 100 units total. So check IMR site if it is still available.
As far as Rah goes mids are lovely due to planar driver. Bass is massive but very good quality. Well controlled, good layering. And you have several filters to tone it down or dial it up to suit any genre/preference. It also scales with power very well.
In short Rah should fit your description. But i think Bob wont let you down with Halcyon if you are looking for mid focused iems with good slam.
Existing customers already know what IMR is capable of when it comes to price/ performance ratio.
Just dont expect for analytical or flat signature here.
I'm hoping the larger 12mm planar means nice prominent detailed mids for the pb1