I took and labeled some pictures of my right ReSound Omnia M&RIE MP receiver mold vs. the original ReSound Quattro mold made for regular MP receivers. Unfortunately, the original mold has yellowed and lost transparency a bit with age, so it’s hard to see the receiver and vent tube channels inside the mold.
Two distinct differences between the molds. The M&RIE receiver vent tube in the ear canal is nowhere near the opening for the receiver in the ear canal. In the Quattro mold for a standard MP receiver, the receiver and vent openings are right next to each other. The second thing is the M&RIE receiver is considerably bigger and longer than the standard MP Quattro receiver so the mold is correspondingly more massive, and the outside end of the receiver almost sticks out to the end of the tragus for each ear to accommodate the length of the straight receiver within the bending shape of the ear canal. For the M&RIE receiver, the length of the run between the “speaker” end of the receiver and the opening of the receiver tube in the ear canal is quite a bit longer, but in spite of that, the sound is great. Not sure if the sound for the M&RIE receiver is being delivered closer to my eardrum. Too bad one doesn’t get a 3D view from the mold design and original impression of exactly how the receiver for each type of mold is positioned in the ear canal relative to the eardrum and the walls of the canal, etc.
Click on each picture to get a larger, easier-to-read, more detailed view.