After falling in love with the LCD-3 at CanJam in March, I finally pulled the trigger on a set. I immediately jacked them into my main system, which is built around a McIntosh MA-6600 integrated amp. It sounded okay, but I was a little disappointed; the cans were too restrained, too polite.
After an hour or so, I moved to my bedroom system, which is based on a vintage Concept 11.0 receiver. Holy crap. This is the sound that led me down the garden path! The Concept's grip and authority is startling. At medium-high volume, I was watching the meters bounce between 20 and 40 watts. I don't know the impedance of the resistor between the amp and the headphone jack, but there was a lot of juice being pushed into the HP output to meet the LCD-3's 110 ohm impedance.
I'm so happy with this combo. I was really worried for a moment that I'd formed a false impression at CanJam and blown my money on a dud set of headphones. I knew amplification was importan, but it didn't occur to me that a beastly 200 wpc McIntosh integrated woudn't be up to the task. The vintage Concept just bent the LCD-3 to its will and drove them beautifully. Now I have to move it to my living room!