HK AUDIO LINEAR 5 L SUB 4000 A 1200W ACTIVE SUBWOOFER

The Sub 4000 A is an addition to the HK Audio Linear system. Its impressive cabinet contains an 18-inch woofer, allowing for frequencies of up to 31 Hz, and making it an excellent 'sub-low' addition to the standard Linear system. Its band-pass design is specially constructed for use with the L Sub 2000 A. Phase shifting will become a thing of the past. We're talking about a subwoofer, which means it contains a 1200 Watt amplifier - ideal for large speaker systems!
HK Audio Linear 5 L Sub 4000 A: applications

You can configure this 18-inch subwoofer in a variety of ways, but it's primarily designed for two different functions. In combination with smaller systems, you can use it as a sub-low addition. Usually, this would result in a 4-way system that creates a balanced sound across the entire spectrum. With bigger systems, it can be used as a normal subwoofer. Thanks to the 18-inch woofer, the L Sub 4000 A produces excellent low tones, which sound especially good in bigger spaces or in the open air. There is also a built-in crossover, suitable for for both mono and stereo signals.

Features
•    Powerful and Versatile 18' subwoofer
•    Birch Multiplex 15/18 mm, 9/13 ply
•    1200 W
•    31 Hz – X-Over
•    137 dB half space
•    1x 18' (4 ohms) with 4' Voice Coil
•    Compatible with all LINEAR 5 fullrange speakers and mid/high units
•    Sub-low add-on to LINEAR SUB 2000

Specs

• Max SPL    135 dB half space (@ 10% THD)
  Max SPL calculated    138 dB half space
  Max SPL peak    137 dB half space (@ 10% THD)
  Cut-off Frequency active    70/100 Hz variable with 24 dB/oct.
  Power Rating    1200 W
  Frequency response +/- 3 dB    39 Hz – X-Over
  Frequency response -10 dB    31 Hz – X-Over
  Sensitivity 1W    99 dB full space, 105 dB half space
  subwoofer amplifier    1200 W @ 4 ohms
  Active protectiion circuits    Undervoltage Protection, Thermoprotection, Short Circuit Protection, Overcurrent Protection
  Input Sensitivity    +4 dBu @ Gain Centerclick
  Protection    Subsonic 24 dB/oct., Peak Limiter
  Connections    2x XLR In, 2x XLR Thru, 2x XLR Mid/High Out
  LF Speaker    1x 18" (4 ohms) with 4" Voice Coil featuring Advanced-Ventilated Voice Coil Gap
  Amplifier    Class D
  Power consumption    3.3 A/230 V (Power Consumption Relating to EN60065 Directive)
  Pole mount    2x M20
  Handles    8, Integrated
  Optional accessories    Protective Covers, Mounting Hardware for Casters, Tilt Unit
  Enclosure    Birch Multiplex 15/18 mm, 9/13 ply
  Grille    2 mm Metal Grille
  Finish    Acrylic Enamel, Black
  Dimensions (WxHxD)    90.8 x 50.8 x 80.7 cm/35¾ x 20 x 3125/32"
  Weight    59 kg/130.1 lbs