Product Description

The SRX728S is built to deliver smooth, clean, accurate low-end. A pair of 18-inch 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.

Technical Description

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 (Continuous *1 / Program / Peak): Parallel: 1600 Watts; 3200 Watts; 6400 Watts

Maximum SPL *2: 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): 23.7 in x 42 in x 33 in (602 mm x 1067 mm x 838 mm)

Net Weight: 166.5 lbs. (76 kg)

*1 - 40 Hz to 120 kHz pink noise with 6 dB crest factor.

*2 - Calculated 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.

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