Mackie SA1232 Brochure - Sa1232 Frequency Response
O F 6 P A G E S
SA1232
Active 3-Way Sound Reinforcement Speaker System
SPEAKER
SA
12
32
SA1232
Active 3-Way Sound Reinforcement Speaker System
O F 6 P A G E S
www.mackie.com
UK
ITALY
FRANCE
GERMANY
SA1232
1
O F 6 P A G E S
SPEAKER
SA
12
32
5
SA1232 Frequency Response
Frequency (Hz)
Vert BW
Horz BW
–6
d
B
B
ea
m
w
id
th
(
de
gr
ee
s)
20
60
120
180
240
300
360
100
1000
10000
20000
SA1232 Beamwidth vs. Frequency
Frequency (Hz)
D
ire
ct
iv
ity
F
ac
to
r
(Q
)
D
ire
ct
iv
ity
In
de
x
(D
I)
, d
B
20
0
10
20
1
10
100
100
1000
10000
20000
SA1232 Directivity Index
The SA1232 produces deep bass through
a duo of 12-inch high-effi ciency RCF Precision
woofers. The magnetic structure designed for
the woofer motor is responsible for the system’s
resulting low-frequency section sensitivity of 101
dB at 1 watt/1 meter. High-effi ciency motors pro-
vide an extraordinary amount of force compared
to the overall cone area along with complete
control of the cone mass. Two 12-inch woof-
ers provide greater air movement than a single
18-inch woofer but with greater speed, control,
and better attack. This type of control allows the
woofers to deliver extended bass response and
to effi ciently reach the mid-frequency crossover
point. The SA1232 frequency response is linear
between 45 Hz and 18 KHz (±3 dB).
A signal panel and a power panel are located
on the amplifi er assembly at the back of the
cabinet, separated by a large aliminum heat
sink. The signal input panel contains XLR con-
nectors for line-level input and loop-through
connections, a level control, and four status LEDs
for Power ON, Signal Present, Limit, and Thermal
functions. The power switch and IEC AC connec-
tor are located on the power panel.
The internal processor provides complete sys-
tem management of all electronic and acoustic
functions including electronic active crossover,
electronic phase alignment, electronic time cor-
rection, electronic equalization, and complete
amplifi er and component protection.
To ensure long-term reliability and perfor-
mance, the amplifi ers are mounted on a mas-
sive heat sink, which is convection cooled and
dramatically extends the life expectancy of the
heat-producing components.
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. There are three-part cast aluminum
handles on each side of the enclosure placed at
the speaker's center of gravity for easy carrying
and setup. Handles are also located on the top
and bottom of the cabinet for easy movement and
relocation. A full-size, oval punched, weather-
resistant steel grille protects the front of the cabinet.
106 dB of sensitivity at 1 watt/1 meter, but more
importantly, it also provides low distortion and
excellent linearity characteristics. This is a funda-
mental reason why 3-way systems can reproduce
mid-band audio signal with higher output, defi ni-
tion, and dynamics. The mid-range transducer
operates between 700 Hz and 3,000 Hz, elimi-
nating the placement of a crossover point in the
middle of critical voice frequencies.
The amplifi ers for the compression driver
and mid-range incorporate a Class AB topology,
renowned for its clarity, warmth, and high-voltage
output required to generate extreme SPL levels.
A Class G design is used for the low-frequency
amplifi er, which features two power supplies for
improved effi ciency and more output power
per pound.
(continued from page 3)
SA1232 Frequency Response On-Axis
Frequency (Hz)
S
P
L,
1
00
d
B
@
1
kH
z
(r
ef
.)
20
70
80
90
100
110
100
1000
10000
20000