Orginally released in 1986, these are a three-way planar-magnetic bass and midrange system, with ribbon tweeter. In very nice condition. Original box, packing, and manual are not included.
"...the sum is then as good as the parts. They offer natural musical life with a wide range of music. They do not favor one type of voice over another, orchestral music over baroque, or guitar over violin. You're never jarred by the feeling that the sound is coming from a small box, or by an unrealistic combination of timbre and apparent hall position. Like most really good speakers, the Magnepan MGIIIa's allow you to ignore the compromises speaker designers must make to produce real-world products. You can simply sit back and listen to the music." - Stereophile
Oak framed "screens". Bass driver: 620 square-inch planar magnetic. Midrange: 170 square-inch planar magnetic. Tweeter: ¼" W by 57" L by 0.0001" thick ribbon. Crossover: 18dB/octave low-pass Butterworth at 300Hz, 6dB/octave high-pass at 800Hz, and at 3kHz between midrange and treble. Frequency response: 37Hz-40kHz ±4dB. Power recommendation: 50W minimum, 200W maximum. Impedance: 4 ohms in the bass, 3 ohms in the treble, pure resistive. Sensitivity: 83-85 dB/W/m. Dimensions: 23" W by 72" H by 2" D. Weight: 52 lbs per side.