Infinity EMIM midrange speaker pulled from a RS2B cabinet. I have all 6 EMIM speakers pulled from the two cabinets. They have all been tested for Ohms and they all range between 2.9 ohms and 3.4ohms with most of them sitting at 3.3-3.4ohms. I have not tested any for sound or audio quality. The only guarantee with these speakers is that they have continuity and will read within the ohm specs stated above. They all have a little hole or 2 in the black fabric (some kinda moth or something must have ate it) but they are not damaged on the ribbon. Some of the steel parts have slight surface rust that can be cleaned up easily. These have not been taken apart or modified. If you want a specific OHM range please let me know at checkout. If you buy multiple and want matching impedance let me know. Ask questions before checkout, there will be no returns for any reason besides damage in shipping. You must have a quality multimeter with clamping probes to prove the ribbon lost continuity from damage during shipping to start a damage return. They all have invisible to the naked eye markings to identify them to avoid fraudulent returns from part swappers. I believe they fit these models : Reference Standard 1- RS1 Reference Standard 1B-RS1A/b Reference Standard RS2A/B RS2 RS2.5 RS4.5