Z-600: Floorstanding, two-way system with two electrostatic tweeters and dynamic 11" woofer section. Frequency range: 30Hz–>30kHz. Crossover frequency: Nominal 1500Hz; 1000–2000Hz overlap region. Nominal impedance: 8 ohms. Power capacity: 100W program.
Dimensions: 26.625" H × 20" W × 13" D.
Price $208.95 (1966); no longer available (2022).
Z-900: Floorstanding, two-way system with dual 11" woofers and 4-element electrostatic tweeter. Frequency range: 20Hz–>30kHz. Impedance: 8 ohms. External power supply requirements (for electrostatic elements…