The Philips/Norelco 9762M is a 12-inch (32 cm) full-range speaker driver from the 1950s–1960s, made in Holland. It’s highly regarded among vintage audio enthusiasts for its sound quality and design.
- Specs: It features a double cone (whizzer) design with an Alnico magnet, a voice coil impedance of 7 ohms, and a max power handling of 20 watts. The resonant frequency (Fs) is around 40 Hz, with a sensitivity of about 99 dB. The Qts is typically between 0.5 and 0.65 (though some sources note a higher Qes of 1.2, which might suggest a need for remagnetization if accurate). The membrane weight is around 25g, and the membrane area is 530 sq-cm.
- Sound and Use: Known for an open, musical, and detailed sound, it performs best in open baffle designs or properly baffled bass reflex enclosures, as noted in vintage audio discussions. It’s often paired with tube amplifiers for optimal performance. Frequency response is cited as 35–18,000 Hz in some sources, though others suggest a more conservative 30–12,000 Hz for the 9762/05 variant.
- Variations: The 9762 series has variants—9762M has a paper whizzer cone, while the 9762/05 uses a Bakelite horn. The AD5200M is considered a successor with similar dimensions but improved wideband performance.
DYSTOPIA
