Engineering Data Sheet
FX20-PRO
▪ 600 W EVX 180B transducer
▪ 30–150 Hz (-10 dB)
▪ High-efficiency planar waveguide design
▪ Voice coil tracking protection
The FX20-PRO is a horn-loaded subwoofer with an
Electro-Voice EVX180B 18“ high performance
transducer. Nominal impedance is 8 Ohm, power
handling 600 W RMS. Power amps up to 1200 W/
8 Ohm can be used in order to have maximum dynamic
range without the danger of thermal overload in noncontrolled situations. The sensitivity of the cabinet is
101 dB/1 W/1 m, the maximum SPL is 135 dB. The
driver is protected by a “Voice Coil Tracking” system
called protection circuitry which prevents overheating.
Recommended crossover frequencies are 80 to 140 Hz
depending on the application.
The housing is made of 15 mm birch plywood and
coated with a very robust textured paint. The front
grille is made of powder coated steel. 4 casters and 4
ergonomic handles provide simple handling.
Parts included
Quantity
Component
1
FX20-PRO
1
Engineering data sheet
1
Important safety instructions
Technical specifications
Description
Passive subwoofer, planar
waveguide bass horn
Nominal impedance
8Ω
Power handling
• Rated power RMS
600 W
• Program power
1200 W
• Peak power
2400 W
Sound pressure level
• SPL 1 W/1 m
101 dB
• Maximum SPL (1 meter)
135 dB
Frequency range (-10 dB),
measured with Xa 4000
30–150 Hz
Recommended active crossover
frequency
140 Hz, 18 dB/oct. Butterworth
Voice coil tracking protection
Yes
Transducer
EVX 180B
Audio sockets
2 | FX20-PRO
• Model
2 ✕ NEUTRIK speakON NL4MPR
• Contacts
1+/1-
Enclosure material
Birch plywood, 15 mm
Enclosure finish
Heavy-duty structured lacquer
Color
Black (RAL 9005, jet black)
Grille
Powder coated steel
Handles
6
Castors
4
Product dimensions (Width ✕
Height ✕ Depth)
610 ✕ 905 ✕ 814 mm
Net weight
54.3 kg
Shipping weight
60.5 kg
NEUTRIK, speakON and etherCON are registered trademarks of Neutrik AG.
SPL / dB
Frequency Response, 1/6 Oct.
110
105
100
95
90
85
80
75
70
65
60
20
100
1k
10k
20k
f / Hz
Frequency response
V1.
V2
V3
INPUT+
RED
V4
LO+
RED
D8
1N4007
220
20W
GREEN
D23
D1
62k
R44
270k
51k
R43
75V
D21
20V
27V
R45
C21
EBC
R48
BC337
BC327
750
R49
10k
10k
3V3
R55
8k2
B C E
10k
10k
R47
BC337 BC337
Q17 Q16
1000µ/50V
D19
2k7
Q15
BC337
4k3
R51
R56
D22
10k
100
R46
Q14
MJE340
XXX
XXX
R54
R50
1k
10k
Q19
BC327
Q18
BC327
R52
1-
R53
C22
10000µ/10V
BLACK
D20
B002
MJE340
R42
LA1
EVX 180B
-1
2+
1N4007
D18
2
1
E3-O
2200µ/160V
+1
+2
-2
GREEN
2-
C17
1-
1N4007
150k
C16
2200µ/160V
R23
150k
R21
10k
R24
100k
D15
R26
RED
+1
+2
-1
YELLOW
2+
R10
6V2/0.5W
-2
1N4007
1+
E3A
150k
B001
R25
150k
R22
2-
Q2
MJE340
BLACK
GREY
INPUT-
Circuit diagram
LO-
FX20-Pro
3 | FX20-PRO
Dimensions
4 | FX20-PRO
Installation/configuration notes
Warning!
We expressly point out that the relevant safe-
!
ty regulations must be observed for “flying”
loudspeaker systems. It is imperative that
qualified expert advice is sought.
Warning!
!
This loudspeaker system can permanently
damage hearing! Use extreme care when setting sound pressure levels!
Warning!
Consult a certified structural engineer before
any attempt to suspend this loudspeaker!
!
Loudspeaker can fall from improper suspension, resulting in severe injury and damage of
property. Do not suspend or mount any other
product or device from this loudspeaker enclosure! Use grade 5 hardware or better only!
Ordering information
FX20-PRO
18” horn-loaded subwoofer with planar waveguide, 8
Ohm, 600 W RMS
Order number F.01U.308.089
Bosch Sicherheitssysteme GmbH
Robert-Bosch-Ring 5
85630 Grasbrunn
Germany
www.dynacord.com
© Bosch Sicherheitssysteme GmbH, 2015 | Data subject to change without notice
Document Number F01U312215 | Vs1 | 06. Aug 2015