ALTEC LANSING 909-8A/909-16A
¥ 96,000 (1 unit, released in 1988)
Commentary
1-inch throat driver unit adopting PASCALITE diaphragm.
It adopts PASCALITE structure diaphragm assembly developed in 299 which is driver unit of 1.4 inch throat.
The voice coil adopts a high-heat-resistant voice coil bobbin made of aramid fiber to improve durability against long-time high-power drive.
Using a Tangerine radial phase plug, high efficiency is achieved while maintaining the correct phase relationship.
Ferrite magnet is used for the magnet, ensuring a magnetic flux density of 18000 Gauss.
There were 2 kinds of variations, 909 to 8 a of 8 Ω specification and 909 to 16 a of 16 Ω specification.
The 909 / 8 a / 16 a can be combined with the MR994A. Moreover, by using the 21216 conversion throat, it can be combined with medium and large manta ray ray-horns such as the MRII500 series.
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Frequency and Impedance Characteristics of Plain Wave Tube
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Harmonic distortion of plain wave tube at rated power input (3W)
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Frequency and and impedance characteristics when the MR994A horn is mounted
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Frequency Characteristics and Impedance Characteristics with 511B Horn
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Model Rating
| Type | Driver unit |
| Frequency characteristic | 500 Hz to 20 kHz |
| AES Rated Input (Pink Noise) | 30W (500 Hz ~) 40W (800 Hz ~) |
| Continuous program input | 60W (500 Hz ~) 80W (800 Hz ~) |
| Peak power | 120W (500 Hz ~) 160W (800 Hz ~) |
| Output sound pressure level (1W 500 Hz to 3.15 kHz, re : 20 μ Pa) |
144 dB SPL (with acoustic tube) 108 dB SPL (with MR994A or 511B horn) |
| Diaphragm | Paskalite |
| Voice coil | 45mm |
| Impedance | 8 Ω (909-8A) 16 Ω (909-16A) |
| External dimensions | Diameter 140x Depth 69 mm |
| Weight | 2.9kg |
| Replacement diaphragm | 26420 (8 Ω) 26421 (16 Ω) |
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