18" Self-Powered Extended Low Frequency Subwoofer System
The PRX718XLF, extended low frequency subwoofer was designed and engineered to provide sub bass frequencies with accuracy and power. Used as a single sub in a sub/sat system or in multiples as part of a scalable, large format sound reinforcement system, the PRX718XLF performs with extreme efficiency and control.
Features
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134 dB peak SPL
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18" Differential Drive® low-frequency driver for low-distortion and higher SPL
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Efficient Class-D amplifier technology
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DSP Input limiter circuit, crossover, dynamic limiting, component optimization, selectable system EQ
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Integrated stereo pass-thru, with selectable HP filter, and polarity reverse
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2 x XLR-1/4" combination inputs, with 2 x XLR loop-thru
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20 mm threaded pole socket for solid, secure satellite speaker mounting.
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Multiple handles with comfort rubber grips for easy transport
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Lightweight poplar plywood cabinets made structurally sound with tongue and groove joints and protected by JBL’s tour proven DuraFlex™finish.
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Cloth backed, dent-resistant 16 gauge steel grilles
Applications
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The PRX718XLF extended low frequency subwoofer was designed and engineered to provide sub bass frequencies with accuracy and power. Used as a single sub in a sub/sat system or in multiples as part of a scalable, large format sound reinforcement system, the PRX718XLF performs with exceptional efficiency and control. The subs are stackable and light-weight ensuring quick set-ups and tear-downs. And due to their rugged construction are perfect for AV rental inventories. With a pole receptacle (that accepts a SS4-BK or SS4-BK24) on the top panel and integrated stereo pass-thru this is the most powerful low-frequency complement to the PRX full-range systems. The addition of a polarity reverse option further enables system optimization.
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The PRX718XLF is a high performance self-powered subwoofer system. The PRX718XLF is comprised of a powerful 2278H Differential Drive® dual voice-coil and magnetic gap, woofer driven by a 1500 Watt Class-D power amplifier. Sophisticated DSP is at the core of a fully featured input section, providing user selectable cross-over functionality, polarity optimization, protection, dynamic limiting and discrete component optimization.
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All PRX700 cabinets are built from a combination of 25mm (on the top and bottom for added rigidity) and 18mm, strong, light-weight poplar plywood made structurally sound with tongue and groove joints. All PRX700 Series cabinets are protected by JBL’s tour proven DuraFlex™ finish. Grilles are made from dent-resistant 16 gauge steel and handles are made from light-weight glass-filled nylon for added strength and durability.
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The amplifier input panel offers stereo inputs with XLR or ¼ inch jack compatibility. A user selectable crossover ensures a smooth transition to full-range system connected to the stereo outputs. Signal present and limiter lights indicate the system status and assist in setting the optimum level via the level control knob.
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Power Rating |
1500 W |
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AC Power Input |
100V - 240V~ 50/60 Hz |
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Frequency Range (-10 dB) |
30 Hz - 103 Hz |
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Frequency Response (±3 dB) |
35 Hz – 87 Hz |
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Internal Crossover Frequency |
100 Hz DSP controlled 48 dB filter slope |
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Loop out Crossover Frequency |
120 Hz analog 24 dB filter slope |
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Maximum SPL |
134 dB peak |
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Signal indicators |
Limit: Yellow LED indicates peak output has been reached and dsp
limiter is acting
Signal: Green LED indicates signal present
Power/Standby: Blue indicates system has power and ready to pass audio,
Red indicates system has power but is in a power saving mode and will not
pass audio. |
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Dynamic Control (Input) |
dbx Type IV™ limiter circuit |
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Input Impedance |
20K Ohms (balanced) |
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Polarity |
normal or reverse polarity |
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LF Driver |
1 x JBL 2278H 460 mm (18 in) woofer |
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Enclosure |
Rectangular, 18 mm, plywood |
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Suspension / Mounting |
M20 threaded pole socket on top |
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Transport |
2 x injection molded handles with backing cup |
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Finish |
Obsidian DuraFlex™ finish |
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Grille |
Powder coated, Obsidian, 16 gauge perforated steel with acoustical transparent black cloth backing. |
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Input Connectors |
Two Balanced female XLR/ 1/4" combo connectors |
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Output Connectors |
Two balanced male XLR connectors. |
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Dimensions (H x W x D) |
690.372 mm x 523.24 mm x 723.9 mm
(27.18 in x 20.60 in x 28.50 in) |
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Net Weight |
36.8 kg (81 lb.)
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