The SA1232 is a high efficiency, extreme output, active
3-way, wide dispersion, sound reinforcement speaker system. The
SA1232 benefits from the integration of 1300 watts of amplifier
power, complete active control electronics, and high precision components
into a speaker system with 103dB of sensitivity (@ 1 watt/1 meter).
The result is unprecedented output, resolution and clarity as well
as mid-range reproduction previously available only from high end,
esoteric PA speaker systems.
The SA1232 features the same horn assembly as introduced
in the Mackie SR1530 active 3-way speaker. The horn is a one piece
design with 90º x 40º dispersion that integrates both
the mid range and high frequency sections. This allows for the horn
loading of the mid-range transducer and seamless coupling between
the MF and HF sections. The 6-inch mid-range's basket assembly is
designed as part of the horn assembly and is also designed to function
asan optimized compression chamber, dramatically simplifying the
mid-range assembly. Also, in three-way designs the mid frequency
horn and the high frequency horn are physically pointing to a different
location in front of the box. The SA1232 features an "Optimized
Wavefront" horn design. Unlike typical mid / high horns, the high
frequency section is positioned to fire down into the six-inch mid-range's
dispersion pattern. This creates a focused, single wave front with
excellent phase and power response characteristics.
The SA1232 Mid / High Section is designed to deliver
over 136dB of acoustic output. This required the design of radically
different components from what was used in the SR1530. The SA1232
incorporates several state of the art advancements in transducer
technology that have been in development for over two years. The
compression driver is a new 1.75-inch titanium diaphragm design
featuring a 3-slot, low distortion geometry phase plug. The magnetic
structure incorporates pure, high grade, Neodymium providing a higher
gauss capability, significant weight reduction and higher BL (force)
in the magnetic gap. This results in higher control of the moving
mass and audio reproduction with lower distortion and distortion
Although the six-inch diaphragm
from the SR1530 looks similar to that of the SA1232, they are in
fact dramatically different. Once again our engineering team developed
a new Neodymium magnetic structure that provides the control and
efficiency required to keep up with the compression driver. By itself,
the mid-range transducer has over 106 dB of sensitivity at 1 watt
/ 1 meter but, more importantly, it also possesses excellent distortion
and linearity. This is a fundamental reason why 3-way systems can
reproduce mid-band audio signal with higher output, definition and
dynamics. The mid-range transducer operates between 700 Hz and 3,000
Hz eliminating the placement of a crossover point in the middle
of critical voice frequencies.
The amplifiers for the compression driver and mid range incorporate
a Class AB topology renowned for its clarity, warmth and more importantly
the high voltage output required to generate extreme SPL levels.
The SA1232 produces deep bass through a duo of 12-inch
high efficiency woofers. The magnetic structure designed for the
woofer motor is greatly responsible for the system's resulting low
frequency section sensitivity of 101 dB at 1 watt / 1 meter. High
efficiency motors provide an extraordinary amount of force compared
to the overall cone area along with complete control of the cone
mass. Two 12-inch woofers provide greater air movement than a single
18" woofer but with greater speed, control and better attack. This
type of control allow the woofers to deliver extended bass response
and to efficiently reach the mid frequency crossover point. The
SA1232 frequency response is linear between 45Hz and 18KHz (+/-3dB).
The rear mounted amplifier assembly features separate
signal and AC power panels separated by a large aluminum heat sink.
The signal input panel contains an input and loop through XLR, a
volume level control and four status LED's for Power ON, Signal
Present, Limit and Thermal functions. The system accepts a standard
line level signal via a XLR input connector.
The system processor provides complete system management
of all electronic and acoustic functions including electronic active
crossover, electronic phase alignment, electronic time correction,
electronic equalization and complete amplifier and component protection.
To ensure long-term reliability and performance, the
amplifier card and processor are mounted to a heat sink eliminating
the need for fans, dramatically extending life expectancy and eliminating
The SA1232 cabinet is constructed using both multi-layered
plywood and pressure injected structural resin. The combination
provides a robust enclosure system with useful ergonomic features.
The top and bottom sections both have handles for easy movement
and relocation.There is one three-part cast aluminum handle on each
side of the enclosure as well as a full size, oval punched, weather
resistant steel grille.