4PRO 1031-A
ACTIVE TWO-WAY SPEAKER
MAIN APPLICATIONS
• Sound reinforcement systems
• Band and vocal PA
• DJ PA systems
• Small to medium size venue Main PA
MAIN FEATURES
• 800 WATT PEAK, 400 WATT RMS
• 131 dB max spl
• 90 x 60, Wide dispersion constant directivity horn
• 10” woofer, 2” voice coil
• 1” HF driver,1.4” voice coil
DESCRIPTION
The 4PRO 1031-A is a two-way active bass reflex loudspeaker offering
extraordinary compact size, high output and vocal fidelity.
It provides low distortion and consistent polar response in a flyable
lightweight enclosure.
The 4PRO 1031-A comprises a 10” woofer and a 1.4” voice coil compression
driver that is mounted to a 90° x 60° constant directivity horn.
It integrates a 400 Watt digital bi-amplifiication, a complete electronic
processor section and RCF low distortion, high power transducers. The system
is compact and extremely linear and offers the typical balanced sound of high
level two way systems.
The 90° angle is wide enough to provide coverage of an audience when used
one per side, yet narrow enough to allow displaying of multiple enclosures
without excessive coverage overlap.
The new 10” inch woofer, with 2” voice coil, is the result of the latest
refinementin years of RCF experience in compact speaker design and
manufacture, resulting in an accurate and a tight extended midbass. The
compression driver uses a new 1 dome, with 1,4” voice coil, in front of a low
compression, optimised geometry, radial phase plug. This innovative design is
powered from a high flux magnet offering extreme precision in high frequency
reproduction.
4PRO 1031-A are equipped with a new generation of 400 Watt Digital
Amplifier, 300 Watt for the woofer and 100 Watt for the compression
driver. The result of this is very high output, extremely low distortion and
an incredible natural sound. The amplifier presents both XLR/jack (Combo)
balanced inputs, XLR output link, volume, a switchable EQ Mode (Contour)
and a mic/line switch. The amplifier features a solid mechanical aluminium
structure which not only stabilize the amplifier during transportation but also
assist in the heat dissipation.
The processor section includes active crossover, system equalization,
transducer phase alignment, limiter and protection functions. The system is
visually monitored from 4 status LEDs. All components are housed in a strong
Baltic birch plywood enclosure where high density polystyrene end caps
guarantee the maximum strength.
The front is protected from a strong, powder coated, metal grille. The cabinet
features two comfortable recessed side handles for easy portability.
ACOUSTICAL SPECIFICATIONS
Frequency response: 50 Hz- 20 Khz
Max SPL: 127 dB
Horizontal coverage angle: 90°
Vertical coverage angle: 60°
Compression driver: 1”, 1.4”v.c.
Midrange: Woofer: 10”, 2”v.c.
INPUT SECTION
Input connector: Combo XLR-JCK
Output connector: XLR
Input sensitivity: -2 dBu / + 4 dBu
PROCESSOR SECTION
Crossover frequencies: 1800 Hz
Protections: Themel, RMS
Limiter: Fast limiter
Controls: Volume, EQ Shape, Mic/Line
AMPLIFIER
Power supply: 400 Watt
High frequencies: 100 Watt
Mid frequencies: Low frequencies: 300 Watt
Cooling: Convection
Connection: VDE connector IN/OUT
PhYSICAL
Height: 539 mm (21.22”)
Width: 320 mm (12.59”)
Depth: 320 mm (12.59”)
Weight: 16.7 Kg (36.81 lbs)
Cabinet: Baltic Birch
Hardware: 3 x Flytracks
Handles: 1 side
Pole mount cap yes
Colour: Black
Frequency (Hz)
4PRO 1031-A
120
110
100
dB SPL
90
80
70
20
100
10
Total Q
1
100 1000 10000
100 1000 10000
Response -20dBu/1m
Frequency (Hz)
Directivity Index and Q
360
330
300
270
240
210
180
150
Coverage Angle (Deg.)
120
90
60
30
0
100 1000 10000
20
18
16
14
Directivity index Di, dB
12
10
8
6
4
2
0
5
0
-5
-10
-15
Attenuation in dB
-20
-25
-30
100 1000 10000
Horizontal ±10 degrees
Horizontal ±20 degrees
Horizontal ±30 degrees
Horizontal ±40 degrees
Horizontal ±50 degrees
Horizontal ±60 degrees
Beamwidth vs. Frequency
Horizontal Beamwidth (1/3 Octave)
Vertical Beamwidth (1/3 Octave)
Normalized Horizontal off-axis Response
5
0
-5
-10
-15
Attenuation in dB
-20
-25
-30
100 1000 10000
Normalized Vertical off-axis Response. Above the box
Vertical +10 degrees
Vertical +20 degrees
Vertical +30 degrees
Vertical +40 degrees
Vertical +50 degrees
Vertical +60 degrees
5
0
-5
-10
-15
Attenuation in dB
-20
-25
-30
100 1000 10000
Normalized Vertical off-axis Response. Below the box
Vertical -10 degrees
Vertical -20 degrees
Vertical -30 degrees
Vertical -40 degrees
Vertical -50 degrees
Vertical -60 degrees
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