QSC ACE 1250 User manual

Hear the Power of Technology.
Specifications
Configuration
High Frequency Transducer
Low Frequency Transducer
Crossover Configuration
Crossover Frequency
Frequency Response (Hz)
±3 dB
-10 dB
Sensitivity (2.83V @ 1 meter)
Full Range (20 Hz–20 kHz)
Biamped LF
Biamped HF
Nominal Impedance
Full Range
Biamped LF
Biamped HF
Power Handling (EIA RS-426A)
Full Range
Biamped LF
Biamped HF
Calculated Maximum Output
(dB SPL @ 1m)
Nominal Coverage (-6 dB)
Enclosure
Cabinet Shape
Enclosure Materials
Finish
Weather Resistance
Grill
Connectors
Suspension Hardware
Dimensions and Weight
Height
Width (Front)
Depth
Trapezoid Angle
Net Weight
Shipping Weight
1250 WR
Two way, ported enclosure
1.5" exit Neodymium compression
driver on conical waveguide
12" (309 mm)
Passive or Bi-amplified (switchable)
1100 Hz
60 Hz–18 kHz
40 Hz–22 kHz
96 dB
–
–
8 ohms
–
–
600W
600W
75W
130 dB
75°
Irregular Pentagon
Composilite™ Composite Core
with Carbon Fiber
Epoxy Resin
Yes
Wood frame w/grill cloth
4 x Neutrik NL4 Speakons
1200 Series Accessories, Aeroquip,
or Forged Closed Loop Eyebolts
29.5" (74.9 cm)
19.5" (49.5 cm)
12.6" (32.0 cm)
45 deg. Prism
49 lb. (22.2 kg)
61 lb. (27.5 kg)
1250 AWR
Two way, ported enclosure
1.5" exit Neodymium compression
driver on conical waveguide
12" (309 mm)
Bi-amplified
1100 Hz
60 Hz–18 kHz
40 Hz–22 kHz
–
96 dB
112 dB
–
8 ohms
8 ohms
–
600W
75W
130/137 dB
75°
Irregular Pentagon
Composilite™ Composite Core
with Carbon Fiber
Epoxy Resin
Yes
Wood frame w/grill cloth
4 x Neutrik NL4 Speakons
1200 Series Accessories, Aeroquip,
or Forged Closed Loop Eyebolts
29.5" (74.9 cm)
19.5" (49.5 cm)
12.6" (32.0 cm)
45 deg. Prism
47 lb. (21.3 kg)
59 lb. (26.6 kg)
The 1200 Series Preliminary Specifications
ACE 1250
Key Features
■Advanced Composilite™ Carbon Fiber
Enclosure — reduces passive enclosure losses
(resulting in greater sonic accuracy), offers
reduced weight, and is highly weather resistant.
■12-inch, 2-Way System — in a lightweight, multi-
purpose enclosure; fully equipped with certified
rigging hardware for improved safety margins
plus reduced shipping and handling costs.
■Spherical Waveguide —mated with 1.5" exit
neodymium compression driver, delivers true
constant-directivity performance, 75° nominal
coverage pattern, and reduced throat distortion.
■Versatile Shape —works as a floor wedge,
side fill, or in small front-of-house clusters.
■High Power Handling — a 4-inch LF voice coil
and 4-inch HF voice coil handle 600W continuous
AES power. With 96 dB efficiency, peak SPL
can reach 130 dB.
■QSC DSP Downloads — for QSC-powered
systems using the DSP-3 programmable
processor, a growing selection of custom
tailored downloads offer virtually perfect
“dialed-in” performance right out of the box.
The QSC-ACE 1250 Composite Loudspeaker is a
full range speaker system that delivers exceptional
sound quality and high SPL in a lightweight, all-
weather carbon fiber enclosure. It makes an
excellent choice for front of house arrays, delay
or downfill clusters, high-level dance systems,
and low profile stage monitoring systems.
The two-way, ported enclosure comprises a
1.5" exit neodymium compression driver coupled
with a high frequency spherical waveguide that
has true constant directivity performance. This
spherical waveguide minimizes throat loading and
distortion issues commonly associated with
conventional high frequency horns. A powerful 12"
LF transducer handles 600 watts of continuous
power and provides smooth response through the
crossover point. With a 75° nominal coverage
pattern, multiple units can be splayed together to
meet expanded coverage and SPL requirements.
The QSC-ACE 1250 WR employs a passive
crossover that can be bypassed for bi-amplified
use. The QSC-ACE 1250 AWR is designed for bi-
amplification only and requires an external crossover.
QSC-ACE enclosures incorporate Composilite™,
a patented core composite technology that yields
superior acoustic properties, lighter weight, and
outstanding weather resistance compared to
conventional enclosure materials. Multiple skins
of carbon fiber are layered over a phenolic honeycomb
core to form a rigid, seamless enclosure. The
extreme stiffness of composite construction prevents
flexing of the enclosure walls, significantly
reducing transmission loss due to wall vibration. The
result is reduced cabinet resonance, increased
low-frequency output, and greater sonic accuracy.
Furthermore, the enclosure’s light weight
translates to safer rigging and reduced handling
costs. Installation accessories and array kits are
readily available.

1250 Frequency Response and Impedance / Enclosure Dimensions
Physical Dimensions
Front
Top
Side
All units in inches
Frequency
Response and
Impedance
(Passive Mode)
Horizontal
Frequency
Response
(O°, 30°, 60°)
Beamwidth vs
Frequency
Directivity
Index and Q
Hear the Power of Technology.
dBSPL
20 Hz 50 100 200 500 1K 2K 5K 10K 20K
Frequency (Hz)
105
100
95
90
85
80
75
70
65
60
55
50
45
30
27
24
21
18
15
12
9
6
3
0
dBSPL
50 Hz 100 200 500 1K 2K 5K 10K 20K
Frequency (Hz)
105
100
95
90
85
80
75
70
65
60
55
50
45
10.0
9.0
8.0
7.0
6.0
5.0
4.0
3.0
2.0
1.0
0.0
Horizontal
Vertical
DI
Q
1000
100
10
100 1000 10000 10000
100 1000 10000 100000
Beamwidth (degrees)
Frequency (Hz)
Frequency (Hz)
DI (dB), Q
QSC Audio Products, Inc.
1675 MacArthur Boulevard
Costa Mesa, CA 92626
Toll-free: [phone]
Tel: [phone]
Fax: [phone]
www.qscaudio.com
For more information about QSC
professional loudspeakers, contact
your local QSC sales representative,
or call us toll-free at: [phone]
Ohm
1200 Series Spec Sheet 10/02/01