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MLD

Multi-Cellular Loudspeaker Array Downfill

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In order to match the performance and tonal balance of MLA, the MLD has been designed around the same acoustic format and electronics package. Coherent arrays of MLA and Downfill can easily be constructed to seamlessly cover the audience planes.

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

Applications

  • Large-scale touring sound reinforcement for
    outdoor festivals, stadia, arenas and concert halls
  • Premium fixed installations in
    concert halls, theatres and sports venues

The MLD Downfill is an important MLA System component. Using just one – or at most - two Downfills to cover the first few rows maximises 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 metres/one hundred feet - leaving fewer boxes to reach the back seats.

The solution is to add a cabinet with a wider vertical dispersion. In the 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 propogate 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.

Links
User guide Brochure Datasheet
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 fans
1 x low-speed internal blower
1 x temperature controlled external fan
MAXIMUM AMBIENT TEMPERATURE 45°C (113°F) for full output
Power Supply
TYPE Switch mode, fixed frequency with PFC AC INPUT OPERATING
RANGE 100 – 240V ~ AC, 50 - 60Hz
CONSUMPTION 900W
MAINS CONNECTOR 16A IEC309 (Ceeform) – IP44 rated
General
ENCLOSURE 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 side
Protective Rubber side-cheeks incorporating skids Wheel-board
Transit cover
Weather 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
Architectural Specs
MLD

The loudspeaker shall be a self-powered, three-way downfill array element. Its transducers shall consist of two 12” horn-loaded low frequency drivers, two 6.5” midrange drivers each coupled to a constant-directivity midrange horn, and three 1” exit compression drivers each coupled to a constant-directivity high frequency horn. The drivers shall be configured to be driven as one low-frequency cell, two midrange cells and three high-frequency cells.

The loudspeaker shall incorporate a Class D amplifier module with six channels of amplification and DSP for independent drive and control of each cell. The amplifier shall deliver a total of 6kW peak output to the transducers and include networking capabilities to enable remote control and system monitoring. Its power supply shall employ Power Factor Correction and operate from 100-240V, 50-60Hz AC.

Audio connectors shall be male and female XLR type and the AC power connector shall be an IEC309 CEE Form.

The loudspeaker shall have 120° horizontal dispersion and 10° vertical dispersion. Vertical dispersion of the complete array shall be determined by a combination of the splay angles between adjacent enclosures and dedicated array control software. The on-axis frequency response shall be 52Hz-18kHz +/- 3dB and the loudspeaker shall produce a maximum SPL of 139dB peak (LF), 139dB peak (MF) and 140dB peak (HF) at 1 metre.

The loudspeaker enclosure shall be constructed from multi-laminate birch and poplar ply with a textured black polyurethane coating. The drivers shall be protected by a perforated steel grille and the enclosure shall incorporate an integral rigging system to enable it to be flown as a downfill element within an array up to 24 enclosures suspended from a dedicated flying frame.

Dimensions excluding wheel-board (W x H x D) shall be 1136mm x 454mm x 680mm (44.7in x 17.9in x 26.8in). Weight shall be 91.5kg (201lbs).

The loudspeaker shall be the Martin Audio MLD.

Drawings
Martin Audio MLD Tech Drawing

Technical Drawings for MLD.
All information is Copyright. Martin Audio Ltd.

JPEG DWG PDF
Accessories
Wheelboard / Transit Covers

ASF90005

MLA Wheel board

COV00004

MLA Transit Cover

ASF90008

MLD Wheel board

COV00011

MLD Transit Cover

ASF90006

MLX Wheel board

ASF15044

Transit Cover for MLX

Electronics

ASF17011

MLA Ruckus Wifi Front of House Rack

ASF17012. MLA Ruckus Front Of House Rack 110v
ASF17012. MLA Ruckus Front Of House Rack 110v

ASF17012

MLA Ruckus Front Of House Rack 110v

ASF17015

Master Rack - Ruckus

ASF17018

6 Circuit Multi-way Cable 30m

ASF17016

Slave Rack - Ruckus 230v

ASF17016

Slave Rack - Ruckus 110v

ASF17044

Control PC Flight Case (Complete)
for MLA

ASF14017

Panasonic Toughbook PC inc Accessories

ASF14004

Leica Disto D8
Laser Distance Meter

ASF14002

Professional WiFi Access Point

Cables / Networking

PWA00058

35m - array XLR cable

PWA00054

3m - MLX XLR cable

PWA00060

0.8m MLA/D XLR cable

PWA00041

120m network cable on drum

PWA00040

Network (U-NET) Cable 35m Belden 1305A

PWA00052

75m network cable on drum

PWA00051

Network (U-NET) Cable 5m Belden

PWA00063

2.5m 16A Ceeform IP67 extension 2.5mm

PWA00039

3m - MLX Unet cable

PWA00038

Network (U-NET) Cable 800mm

PWA00057

35m - clinometer XLR cable

PCX00043

Unet (ODU female) to RJ45 female converter

PWA00053

Unet (ODU female) to RJ45 female converter

ASF12007

6-Circuit to 12-Way Break out Loom

ASF12006

15m, 3-Circuit to 6-Way Break out.

ASF12002

6 Circuit Multi-way Cable 30m

ASF12008

230V 3ph 32A 12 cct mains distro

Hardware

ASF12009

MLA Master/Slave Flight Case
Inc. 110v Mains Distro

ASF17001

MLA Flying Frame Case (Complete)

ASF20030

MLA flying frame

ASF20030

MLA break out (distro) hanger

ASF20033

MLA ground stack bars (pair)

Flight Cases

CAR00030

MLA Master/Slave Flightcase

CAR00049

MLA Front of House Rack Flightcase

CAR00031

MLA cable trunk

CAR00033

Control PC flight case

CAR00042

Flying frame flight case

CAR00049

MLA Front of House Rack Flightcase

Available in this Series

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All material © 2017.
Copyright Martin Audio Ltd.
Subject to change without notice.
Martin Audio Ltd. Reg. No. 4824341

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