JBL SRX728S Dual 18IN Subwoofer 1600WRMS

JBL SRX728S Details ^top

For over a decade, JBL SR and SRX series speakers have represented the best performance, highest quality and most advanced driver technology available to portable PA users. The SRX700 series continues that tradition and moves the bar even higher.

The advanced technology of SRX700 series speakers delivers the power and performance that you would expect from the highest quality, professional rig. At the same time, JBL innovation and design have reduced system weight so load in and out are a breeze. All this performance is housed in rugged birch enclosures for years of superb performance.

All SRX700 2 and 3-way models may be operated full-range or bi-amplified. The selection is made by means of a high-current, recessed switch mounted on the input plate. The switch is accessible while also being protected from accidental mis-setting.

The same switch arrangement is used on the subwoofer to select +/-1 or +/-2 operation.

SRX700 is constructed of top quality birch plywood and coated in JBL's rugged DuraFlex™ finish. Extensive use of internal braces and bulkheads makes the enclosures extremely rigid. This reduces acoustic losses caused by panel resonance. The attractive CNC-machined, 16-gauge steel grille wraps around the sides of the enclosure so there are no protruding lips on the front of the system to create acoustical interference. The grilles are internally lined with acoustically transparent foam to provide additional driver protection and give a totally professional appearance.

High Power
Amplifier manufacturers are building amps that can produce more power at less cost than ever before. The SRX700 series lets you unleash that power with a new generation of very high power low-frequency drivers. That would be enough for most manufacturers, but JBL accomplished this while also greatly reducing the weight of the drivers.

Incredibly Lightweight
SRX700 uses JBL's parented Differential Drive® woofers with neodymium magnets. Neodymium's magnetic properties allow a few ounces to replace pounds of conventional magnet.

SRX728S - Dual 18" subwoofer

The SRX728S is buyilt to deliver smooth, clean, accurate low-end. A pair of 18" Differential Drive® woofers provide extension down to 27 Hz while handling an amazing 1600 watts of continuous power. Large, open ducts minimize port turbulance and the heavily braced enclosure assures tight, solid bass. An external switch allows the SRX728S to be used with cabling systems designed to power subs from contacts ±1 or ±2.

Key Features:
•Dual 18 inch, 2268H Differential
Drive® woofers for extended lowfrequency 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 flexibility for compatibility with a
variety of cabling schemes. A recessed, external switch allows selection of either contacts +1/-1 or +2/-2. By relocating an internal connector, it is also possible to drive each woofer discretely from a separate amplifier channel. The enclosure is constructed of top quality birch plywood and coated in JBL’s rugged DuraFlex™ finish. Each woofer is housed in an isolated chamber and the enclosure is heavily braced to maximize low-frequency performance. The attractive CNCmachined,
16-gauge steel grille is internally lined with acoustically transparent foam to provide additional driver protection and give a very professional appearance.

*U.S. Patent 5,748,760; other U.S. and foreign patents pending.

JBL SRX728S Specs ^top

Specifications:
Frequency Range (-10 dB): 27 Hz – 220 Hz
Frequency Response (±3 dB): 33 Hz – 220 Hz
Input Connection Modes: Switchable, +1/-1 or +2/-2
Internally selectable, Parallel or Discrete
Recommended Crossover Frequencies: 80 Hz, 24 dB / octave HPF
80 Hz, 24 dB / octave LPF
Power Rating
(Continuous1 / Program / Peak): Parallel: 1600 W / 3200 W / 6400 W
Maximum SPL2: 136 dB SPL peak
Sensitivity (1w @ 1m): 98 dB SPL
LF Driver: 2 x JBL 2268H 457 mm (18 in) Differential Drive
woofer with neodymium-magnet and dual voice-coils
Nominal Impedance: Parallel: 4 ohms
Discrete: 8 ohms x 2
Active Tunings: dbx DriveRack, all models.
Enclosure: Rectangular, 18 mm, 13-ply birch plywood
Finish: Black DuraFlex finish
Grille: Powder coated, black, 16-gauge perforated steel with
acoustical transparent charcoal foam backing.
Removable JBL badge and punched JBL logo.
Input Connectors: Neutrik® Speakon® NL-4 (x2)
Dimensions (H x W x D): 602 mm x 1067 mm x 838 mm
(23.7 in x 42 in x 33 in)
Net Weight: 76 kg (166.5 lb)
Optional Accessories: SRX728S-CVR: Pull-over padded cover

Review of JBL SRX728S

RATING:

Sound Quality	9
Features	9
Ease Of Use	10
Value	9
Reliability	9
Overall	9

Just purchased this sub 2 weeks ago for my son's Birthday party in our backyard and was very happy with the overall sound quality: tight deep bass, smooth roll-of frequencies, well built. This sub is a little power hungry since I bridged an QSC RMX-4050HD with 4000 Watts RMS into 4 ohms which this sub is rated at 4 ohms, and still not enough power to crank it at its loudest. However, if I crank it up any louder, I will get a citation from the city since the cops already came for the first warning due to our neighbors complaints at 1 2 or 1 mile away in the valley. My system included: Main Speakers: JBL 725 (2x) Sub Woofer: JBL 728s(1x) Amplifiers: QSC RMX2450 (2x) QSC RMX4050HD(1x) Processor EQ: DBX Driverack PA(1x) Mixer: Pioneer JDM800(1x) CD: Pioneer CDJ800MK2(2x) This system was purchased for home uses and had many compliments from professional DJ for its sound quality

-David Nguyen
-San Jose, CA, 04/05/07

Review of JBL SRX728S

RATING:

Sound Quality	10
Features	10
Ease Of Use	10
Value	10
Reliability	10
Overall	10

This Sub really kicks ass!!! I power mine with a QSC Plx3402 in Bridged Mono Mode and it handles the 3600 watts with no problem and gives you that THUMP you feel in your chest.It is a little heavy (160lbs) but I put castors on mine so I can wheel it around.

-Kevin
-New York, 10/21/06

See all reviews of JBL SRX728S.