An Interesting History Of Headphones
Some time ago I stumbled upon a nice article that proposed to be something of a history of headphones. It’s a fairly good effort on the part of the author. However, I would like to add my two-cents in reference to a couple of missing items that I think are significant.
When I was in school in the mid-1980’s I was studying music recording and broadcasting. I spent a lot of time in and around various recording studios around Toronto. The single most common headset that I saw at that time was the AKG K240 Studio monitors. These were the reference grade dynamic headphones used in many facilities at that time.
The K240s are genuinely, big-ole, cans. A circumaural headphone with a semi-open design they sound great, even today. They can be cleanly driven to excessive volumes if required. Fairly efficient, they can even be powered by a cell phone or iPod.
Like many people we have a wooden deck at the back of the house into the back yard. It has long been my intent to extend our ability to play music to the back yard, but it has only recently com to pass. It’s essentially the next step in my long standing plans to deploy Whole House Audio, a project that recalls 
When experimenting with a new audio path I like to take measurements. Long ago, in an age of techno-pre-history known as the late 1980’s, I craved what were then an emerging class of computerized test instruments, like the 
so I decided to record the output of the sweep generator in Audio Tool to the H2. Then I tool the resulting WAV file into 
Inspired by 
Opus promises to be a great tool for online audio. In technology, as in music, not all opus are implemented equally. Allow me to explain.
This past week I bought our fifth 
streaming music player. It’s