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.
The PRX718XLF is a high performance self-powered subwoofer system. The PRX718XLF is comprised of a powerful 2278G 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.
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.
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.
134 dB peak SPL
18" Differential Drive® low-frequency driver for low-distortion and higher SPL
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.
Dynamic Control (Input)
dbx Type IV™ limiter circuit
20K Ohms (balanced)
normal or reverse polarity
1 x JBL 2278G 460 mm (18 in) woofer
Rectangular, 18 mm, plywood
Suspension / Mounting
M20 threaded pole socket on top
2 x injection molded handles with backing cup
Obsidian DuraFlex™ finish
Powder coated, Obsidian, 16 gauge perforated steel with acoustical transparent black cloth backing.
Two Balanced female XLR/ 1/4" combo connectors
Two balanced male XLR connectors.
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)