SRX728S Dual 18″ High Power
Subwoofer
SRX728S Dual 18″ High Power
Subwoofer
Professional Series
Key Features:
Dual 18 inch, 2268H Differential
Drive® woofers for extended low-
frequency output
Large vent area for reduced
distortion
Applications
Live performance venues
Mobile and fixed DJ systems
Sound system rental
The SRX728S is a high power
subwoofer system containing two
2268H neodymium magnet, patented*
®
Differential Drive , 18″ woofers in a
front-loaded, vented enclosure. The
enclosure is designed to present a
minimum frontal area. The system
offers complete input connection Specifications:
flexibility for compatibility with a
variety of cabling schemes. A recessed, Frequency Range (-10 dB): 27 Hz – 220 Hz
external switch allows selection of
Frequency Response (±3 dB): 33 Hz – 220 Hz
either contacts +1/-1 or +2/-2. By Input Connection Modes: Switchable, +1/-1 or +2/-2
relocating an internal connector, it is Internally selectable, Parallel or Discrete
also possible to drive each woofer Recommended Crossover Frequencies: 80 Hz, 24 dB / octave HPF
discretely from a separate amplifier 80 Hz, 24 dB / octave LPF
channel. Power Rating
1
(Continuous / Program / Peak): Parallel: 1600 W / 3200 W / 6400 W
The enclosure is constructed of top 2
Maximum SPL : 136 dB SPL peak
quality birch plywood and coated in Sensitivity (1w @ 1m): 98 dB SPL
JBL’s rugged DuraFlex™ finish. Each LF Driver: 2 x JBL 2268H 457 mm (18 in) Differential Drive
woofer is housed in an isolated woofer with neodymium-magnet and dual voice-coils
chamber and the enclosure is heavily Nominal Impedance: Parallel: 4 ohms
braced to maximize low-frequency Discrete: 8 ohms x 2
performance. The attractive CNC- Active Tunings: dbx DriveRack, all models. Settings available at
www.jblpro.com
machined, 16-gauge steel grille is Enclosure: Rectangular, 18 mm, 13-ply birch plywood
internally lined with acoustically Finish: Black DuraFlex finish
transparent foam to provide additional Grille: Powder coated, black, 16-gauge perforated steel with
driver protection and give a very acoustical transparent charcoal foam backing.
professional appearance. Removable JBL badge and punched JBL logo.
Input Connectors: Neutrik® Speakon® NL-4 (x2)
*U.S. Patent 5,748,760; other U.S. and foreign patents Dimensions (H x W x D): 602 mm x 1067 mm x 838 mm
pending. (23.7 in x 42 in x 33 in)
Net Weight: 76 kg (166.5 lb)
Optional Accessories: SRX728S-CVR: Pull-over padded cover
140 Hz to 120 kHz pink noise with 6 dB crest factor.
2Calculated based on power rating and sensitivity.
JBL continually engages in research related to product improvement. Some materials, production methods and design
refinements are introduced into existing products without notice as a routine expression of that philosophy. For this
reason, any current JBL product may differ in some respect from its published description, but will always equal or
exceed the original design specifications unless otherwise stated.