Hi Everyone I am also a proud owner of a set of TDL standard reference M and i have over the years brought and sold 1000s of speakers and none have been able to match the realism of these speakers they are outstanding in every way there production of sound can be summed up as follows MAGIC! The sound is fast and tunefullyet not bright; it is open and clear with so much midrange detail you will think the band is in the room with you, fatigue-free and grain-free allways sounding like you have only just started listening and still have hours of enjoyment ahead of you. Bass notes are precisely defined, deep and tuneful and they deliver right down to 14 HZ when correctley partnered and the bass hits you with amazing impact. The midband, especially vocals and solo instruments, takes on a naturalness never before heard from a pair of speakers they are truly inspireing. The treble is smooth and fast with both brilliance and sparkle. But the speakers never sound bright, brittle, grainy or spitty. They just sound right. They are in my opinion one of the greatest speakers in the world and represent the pinnacle of Transmission line speakers, The bass units run individualy from the crossovers one on 8ohm and the other on 16ohm so that you recieve the full bass range as the speakers ressonate slightly differently at diffrent ohm inputs, The tweeters go upto the dizzy hieght of 35khz without sounding harsh which is quite some task, If you get the chance at owning a pair of these speakers you will be utterley amazed at the pressence and impact they realy will change your life.