Don't Just Sit There!
Like every sensible publication, The Stereophile keeps track of the questions raised by readers who write to us, so we can get some idea of what most of you would like to see in future issues of the magazine. To date, the list looks like this, in order of diminishing interest: transistor amps and preamps, loudspeakers, pickups, tape equipment, tuners and, way at the bottom of the list, recordings. We are devoting most of the August 1964 issue to a discussion of commercial recording practices.
The top-of-the-line model from America's leading headphone manufacturer, these are bulky, heavy, very business-like in appearance, and very, very good.
The ESP-9 is dual-powered: from the AC line, or from the input signal itself, The power supply is rather large and heavy, and appropriate in appearance to the phones. Amplifier connections are via wires with spade lugs attached, and speaker connections are made to the rear of the power supply. A front-panel switch selects speaker or headphone operation, and terminates the amplifier outputs with 10 ohms in the Phones position.
Construction is typically top-of-the-line Koss: Rugged, nicely finished, and apparently very durable, and the phones are easy to handle. (Many headphones are so loosely pivoted on their headbands that they swing into impossible positions whenever you pick them up.)