Quad 12-inch Low Frequency Subwoofer

Non-powered STX5M2 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.


STX5L loudspeakers are non-powered, for use with external amplification. Rated at 4000 Watts program at 4 Ohms.

Key Features

• Quad 12-Inch LF Modules
A perfect complement to the ST/STX5 when additional low frequency energy is required.

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

• Four High Power, High Performance 12-Inch Woofers
Accurate 40 Hz to 500 Hz response, 143 dB peak SPL performance

• Trapezoidal Enclosures
Share the same footprint as their companion ST/STXM2 mid-high modules and the ST/STX5, ST/STX6, ST/STX7, ST/STX8 and ST/STX9 full range loudspeakers.



• Virtually any application where low frequency directional control and array-ability 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 ST/STX5M2 mid-high modules and ST/STX5, ST/STX6, ST/STX7, ST/STX8 and ST/STX9 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: STX5L 104 dB
Max SPL: STX5L 143 dB peak
Freq. Response: 40 Hz to 500 Hz
LF Drivers: Four 12” model SSL 12-13 woofers; 4” VC each 500 W RMS (2000 W RMS total)
Crossover Points: 500 Hz
Enclosure: Multi-ply hardwood, perforated metal grille
Power: STX5L 2000 W RMS @ 4 Ohms
Connectors: STX5L 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: 32″ H x 24″ W x 32 1/2″ D
(81.3 cm x 61 cm x 81.9 cm)
Weight: STX5L 170 Lbs (77.1 kg) Net