JBL PRX718XLF 18" Self-Powered Extended Low Frequency Subwoofer System

JBL PRX718XLF 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 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.

Features:

134 dB peak SPL

18" Differential Drive® low-frequency driver for low-distortion
and higher SPL

Efficient Class-D amplifier technology

DSP Input limiter circuit, crossover, dynamic limiting, component optimization, selectable system EQ

Integrated stereo pass-thru, with selectable HP filter, and polarity reverse

2 x XLR-1/4" combination inputs, with 2 x XLR loop-thru

Pole receptacle accepts a SS4-BK or SS4-BK24 on the top panel

Multiple handles with comfort rubber grips for easy transport

Integrated M10 suspension points for easy setup

Lightweight poplar plywood cabinets made structurally sound with tongue and groove joints and protected by JBL’s tour proven DuraFlex™finish.

Cloth backed, dent-resistant 16 gauge steel grilles

Specifications:

Power Rating

1500 W

Frequency Range (-10 dB)

30 Hz - 103 Hz

Frequency Response (±3 dB)

35 Hz – 87 Hz

Internal Crossover Frequency

90 Hz DSP controlled 48 dB filter slope

Loop out Crossover Frequency

120 Hz analog 24 dB filter slope

Maximum SPL

134 dB peak

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.

Dynamic Control (Input)

dbx Type IV™ limiter circuit

Input Impedance

20K Ohms (balanced)

Polarity

normal or reverse polarity

LF Driver

1 x JBL 2278G 460 mm (18 in) woofer

Enclosure

Rectangular, 18 mm, plywood

Suspension / Mounting

M20 threaded pole socket on top

Transport

2 x injection molded handles with backing cup

Finish

Obsidian DuraFlex™ finish

Grille

Powder coated, Obsidian, 16 gauge perforated steel with acoustical transparent black cloth backing.

Input Connectors

Two Balanced female XLR/ 1/4" combo connectors

Output 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)

Net Weight

36.8 kg (81 lb.)

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JBL PRX718XLF 18" Self-Powered Extended Low Frequency Subwoofer System

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