My brother has an all McIntosh system and these speakers were part of that for many years. He babied his equipment. When they were made, the guy designing them cherry picked components from JBL... the same stuff that went in their pro line. The woofers are 15 inch D300s with the cloth surrounds. They're tanks, rated up to 100 watts. It's the speaker that Fender would put in their guitar amps. The cabinetry is a little worn, but functionally the speakers are perfect. There are big differences between headphones and speakers. It's possible with room treatment and care in selecting and setting up speakers to achieve as much audible detail and clarity as headphones. But no headphone will ever match the dimensional aspect of speaker soundstage or the visceral sound pressure of a good subwoofer. I used headphones for many years because I lived in an apartment and didn't want to bother the neighbors. But when I bought a house and set up a dedicated theater/listening room, I put the cans in a drawer and never looked back. There is no question that music has more vivid impact with speakers than it does with headphones. I'm interested to see what digital signal processing can do to narrow the gap between speakers and headphones when it comes to soundstage. It would especially be interesting if you could tune the processing to simulate different kinds of synthetic spaces.