Martin Audio MLD, Large-format, numerically-optimized multi-celled downfill element for MLA. The Martin Audio MLD Downfill is an important MLA System component. Using just one – or at most - two Downfills to cover the first few rows maximizes the projection and efficiency of the entire array. Line array systems project, or throw better when the inter-cabinet angles are small. Unfortunately, real-world requirements often dictate that the flown array must cover right up to the stage barrier. Arrays designed in this manner take on the familiar, highly-curved, banana shape. This is wasteful of array elements as almost half the array ends up being used to cover the first thirty meters/one hundred feet - leaving fewer boxes to reach the back seats. The solution is to add a cabinet with a wider vertical dispersion. In Downfill’s case, this is 20°. Using only one - or at the most two - Downfills at the bottom of an array results in a lower curvature more directional array that projects much further and covers right up to the stage barrier. The Downfill’s benefits are not confined to the vertical plane. With an extremely wide horizontal dispersion of 120°, the Downfill reaches to front-row-central as well as the ends of the front rows. Our HiBlade™ patent-pending technology ensures ultra-high frequencies propagate right out to the edges of the dispersion pattern. Conventional 120° horns without this device tend to lose high-frequency sparkle rapidly, as the listener moves off-axis. Martin Audio MLD Main Key Features Downfill for MLA system Three-way all-horn design delivers LF/MF/HF peak SPL’s of 139/139/140dB 120°H x 20°V coverage 52Hz-18kHz ± 3dB full-bandwidth frequency response Specification ACOUSTICAL TYPE Three-way cellular drive, active array element FREQUENCY RESPONSE (1) 52Hz-18kHz ± 3dB MAXIMUM SPL LF: 133dB continuous, 139dB peak (3) MF: 133dB continuous, 139dB peak (4) HF: 134dB continuous, 140dB peak (4) DRIVERS LF 2x12” (300mm)/3” (75mm) voice coil, ultra-long excursion, neodymium magnet drivers, Hybrid® bass horn-loaded MF 2 x 6.5” (165mm)/2” (50mm) coil, neodymium magnet drivers, horn-loaded HF 3 x 1” (25mm) exit neodymium magnet compression drivers, horn-loaded RATED POWER (2) LF 800W AES, 3200W peak MF 400W AES, 1600W peak HF 150W AES, 600W peak DISPERSION (-6dB): 120º horizontal (-10dB): 140º horizontal 20˚ vertical CROSSOVER FREQUENCIES 320Hz: 8th-order Linkwitz-Riley 4kHz: Vanishing Point™ FIR filters AUDIO INPUT CONNECTORS Female XLR input, male XLR link output ANALOGUE INPUT IMPEDANCE 20kΩ balanced to ground MAXIMUM ANALOGUE INPUT LEVEL 6.15Vrms (+18dBu), over-voltage protected NOMINAL SYSTEM GAIN 28.5dB AES/EBU IMPEDANCE 110Ω balanced, Receive and transmit termination NETWORK CONNECTORS 2x IP68 rated 8-way, quick-release type PROTOCOL U-NET AMPLIFIER MODULE TYPE Six-channel Class D, fixed-frequency PEAK OUTPUT POWER 6000W AVERAGE EFFICIENCY 75% COOLING 4 x temperature-controlled internal fans1 x low-speed internal blower1 x temperature-controlled external fan MAXIMUM AMBIENT TEMPERATURE 45°C (113°F) for full output POWER SUPPLY TYPE Switch mode, the fixed frequency with PFC AC INPUT OPERATING RANGE 100 – 240V ~ AC, 50 - 60Hz CONSUMPTION 900W MAINS CONNECTOR 16A IEC309 (Ceeform) – IP44 rated GENERAL ENCLOSURE A vertical trapezoid with 10º wall angle, multi-laminate birch, and poplar-ply construction FINISH Textured black PU coating PROTECTIVE GRILLE Black HEX perforated steel FITTINGS Proprietary rigging system Bar handles on each sideProtective Rubber side-cheeks incorporating skids Wheel-boardTransit coverWeather protection cowl IP RATING IP 24 DIMENSIONS (inc. wheel-board) (W) 1136mm x (H) 454mm (458mm) x (D) 680mm (840mm)(W) 44.7 x (H) 17.9in (18in) x (D) 26.8in (33.1in) WEIGHT (EX. WHEEL-BOARD) 91.5kg, 201lbs
