24 July 2022

PIONEER CT-959/447 (1990) - Original Promo Video

PIONEER CT-959/447 (1990) - Original Promo Video

03 July 2022

Technics Monitor 2 (1982) - Honeycomb Disc Speaker System

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The Technics Monitor 2 (SB-M2) was introduced in 1982 as a slightly simplified version of the first Honeycomb Disc Speaker System from Technics, the Monitor 1 introduced in 1981. The Technics SB-M2 was specially developed to provide the performance required for accurate and undistorted reproduction of digital material. Specifically, this means high power handling capacity, high linearity at high input levels, and flat frequency and phase response throughout the audio spectrum and beyond. Honeycomb disc drivers are used for the woofer, midrange and tweeter in this 3-way, bass reflex system. The traditional cone shaped driver suffers from an inherent problem called the cavity effect. As a result, there is uneven frequency response as well as sound quality degradation. In contrast, th Technics Honeycomb Disc Driver is flat, so it eliminates these delays or phase irregularities. Smooth and extended low range response is a major feature of the SB-M2. 

Mounted on a sturdy diecast aluminum frame, the honeycomb disc woofer is a full 38 cm in diameter to assure efficient bass reproduction. The magnet weighs 3.1 kg and is 200 mm in diameter with high flux density of 14,800 gauss. The 75 mm wide voice coil employs a glass fiber reinforced polyamide bobbin and polyamide self-adhesive coil which allow the woofer to withstand temperatures of up to 250*C. This contributes to the high power handling and great efficiency of 92 dB/W/m. The 8 cm Honeycomb Disc Midrange is using a direct-coupled voice coil 50 mm in diameter capable of maintaining pistonic motion up to 10 khz. The unit is mounted in a diecast aluminum frame for extra stability. For high frequencies there is a 2.8 cm Honeycomb Disc Tweeter. Crossing over at 4 kHz, this remarkable tweeter extends response up to 38 kHz (-16 dB). It's unusual diaphragm is made of laminated mica, 20 microns thin. To bring out the best in individual driver performance, careful attention was paid to waveform linearity in the crossover network. Technical specifications: 3-way, 3-speaker, bass-reflex | Impedance 6 ohms | Input power: 130W (DIN), 300W (Music) | Frequency range: 27Hz-38kHz (-16dB), 35Hz-35kHz (-10dB) | Crossover frequency: 750/4000 Hz | Dimensions: 540x820x415 mm | Weight: 50 kg. | Available in grey (S version) or walnut veneer enclosure (M version). | Price in 1983: 5400 DM/pair (Germany).

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loudspeaker

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