On the main Hilla Limann highway Opposite the Turkish Central Mosque
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Pecific technical data sheet for a model explicitly named "Mordaunt Short M399."
It is highly likely that this query refers to the Mordaunt-Short Alumni 9 (also known as MS339), an active subwoofer often sold in home cinema packages.
Here are the specifications for the Mordaunt-Short Alumni 9 (MS339) subwoofer:
Type: Active/Powered Subwoofer
Driver: 8-inch (200mm) long-throw CPC (Continuous Profile Cone) woofer
Amplifier Power: 120W (built-in)
Frequency Response: 35Hz - 200Hz
Inputs: Line in, High Level in
Dimensions: 376 x 260 x 354mm (14.8 x 10.2 x 13.9 inches)
Weight: 15Kg (33lbs)
Features: Variable crossover (50 - 160Hz), downward-firing driver