It's been a few months since my 1st pair of Epi. With my 2nd pair Epi with the upgraded version, I was told the overall improvement would be just a few percent. For my own ears, I find it to be more than 10% improvement over the standard version. For now, the bass is a tad deeper, the details more clarity and extend more, then here is my favorite part, the vocal is to die for. I always thought only Scanspeak would give me such romantic & emotion on the mid, but this little pair is just more than anyone could ask for. At the end they are in the Odyssey line of speakers, and they share similarities. For its small size is more than enough to fill my 22x20x9 ft room. I love Odyssey so much & order me a Candela & the Kismet Tube Phono Preamp. I received my Candela last week & the next week will be my Kismet Phono. I know many people might not like the C product, but I put in the a pair of Psvane 12au7 MK1, OMG... is all that I can say. Words cannot describe how it sounds. If you have Candela, give it a try & let's see what your thoughts.