Dual 12-Inch Low Frequency Subwoofer

Non-powered STX4L Series loudspeakers unite advanced technology and application-driven engineering to bring live sound closer to the ultimate reference point: reality. Patented CoEntrant Mid/Hi transducers and unique innovations like our Complex Conic Horns combine to deliver natural sounding music and intelligible speech. Wherever audiences and operators demand superior performance and ease of use, ST/STX Series loudspeakers are an excellent choice for transparent, reference quality performance.


STX4L loudspeakers are non-powered, for use with external amplification. Rated at 1600 Watts program at 4 Ohms.

Key Features

Compact Dual 12-Inch LF Modules
A perfect complement to the ST/STX4 when additional low frequency energy is required.

Flexible Input Configurations
Choose the STX4L with external amplification.

Dipolar Low Frequency Design
Provides superior low frequency directional control in the vertical plane.

High Power, High Performance 12-Inch Woofers
Accurate 40 Hz to 500 Hz response, 133 dB peak SPL performance

Trapezoidal Enclosures
Identical in size and shape to the ST4R and STX4 full range loudspeakers.


• Virtually any application where low frequency directional control and arrayability are critical issues and outstanding sonic performance is required.

• Distributed systems in sports arenas and stadiums, Multi-channel A/V playback systems, live sound and music systems in dance clubs (with associated ST4R and STX4 full-range 3-way loudspeakers).

• Array modules for theatrical and concert sound systems, sound reinforcement systems in houses of worship, performing art centers, etc..

Technical Information

Sensitivity: STX4L 101 dB
Max SPL: STX4L 136 dB peak
Freq. Response: 40 Hz to 500 kHz
LF Drivers: Dual 12”model SSL 12-11 woofers; 3” VC each 400 W RMS (800 W RMS total)
Crossover Points: 500 Hz
Enclosure: Multi-ply hardwood, perforated metal grille
Power: STX4L 800 W RMS @ 4 Ohms
Connectors: STX4L Neutrik 4-pin connectors or screw terminals
Finish: Black, White or Natural (unfinished) paint
Custom Color
Weather Resistant
TuffTex (black only)
Hardware: 12-point Universal Mounting Hardware
AeroQuip fly-track
R-Hang hardware
Dimensions: 30 1/4″ H x 16 5/8″ W x 23 1/2″ D
(76.8 cm x 42.2 cm x 59.7 cm)
Weight: STX4L 100 Lbs (45.4 kg) Net