Martin Audio MLA User Manual page 45

MLA System
USER GUIDE
The acoustic design of the MLX is based on the successful Hybrid® system with the drivers horn-loaded on their front with a
reflex port on the rear chamber to obtain the efficiency of a horn loaded design with the extra low frequency extension possible
from a reflex enclosure. The cabinet uses twin 18"drivers into a large format folded horn exiting at the front of the enclosure
with four reflex ports, two from each driver located on the front of the box in the four corners.
The MLX uses a revolutionary iPal (Integrated Powered Adaptive Loudspeaker) system which involves a unique integration
between a Class D high power amplifier module, a differential pressure sensing device, a very low latency DSP system and a
dedicated high efficiency transducer. The amplifier is PFC (Power Factor Corrected) equipped making it immune from fluctuations
in mains voltage and is capable of delivering up to 8,500W. This drives the dedicated iPal 18"neodymium magnet 3,400W rated
woofers. The output from the drivers is monitored by the differential pressure sensor both in front and behind the baffle. The
sensor feeds back pressure information to the DSP module which in turn feeds the amplifier module. Thus the system is a closed
loop with continuous monitoring of the exact position of the driver cone at any moment in time. This is compared to the input
signal and corrections are made to the drive signal resulting in an incredibly linear system capable of phenomenal output without
fear of damage as the close monitoring of the precise driver output allows the DSP to restrict levels to the safe operating limits;-
MLA System User Guide V2.1
45