MD Series
ModularDesign Subwoofers
MD-S215 | MD-S218
Features
• Available in either black or white finishes
• Flat response down to 24 Hz
• Foam backed, powder coated, heavy gauge steel grille
• Sixteen 3/8"-16 threaded attachment points address all
suspension requirements
• Input connection panel has both Speakon® and terminal
strip connectors
MD Subwoofers offer exceptional performance in
a wide variety of applications, including houses of
worship, performing arts facilities, hotels, casinos,
night clubs, and sporting facilities. For design/build
contractors and electroacoustic design consultants,
MD Subwoofers offer an effective solution to the
myriad of challenges encountered in the design
and implementation of permanently installed sound
reinforcement systems.
Specifications
MD-S215
MD-S218
Configuration
Two 15" long-throw woofers
with 4" voice coils, aluminum
demodulating ring
Two 18" long-throw woofers
with 4" voice coils, aluminum
demodulating ring
Frequency Response (-6 dB)1
Frequency Range (-10 dB)1
Nominal Impedance
Sensitivity (1 W at 1 m)1
RMS Power Handling2
Maximum Output at 1 m
Continuous 3
27 Hz - 2 kHz
25 Hz - 2.3 kHz
4Ω
26 Hz - 1.8 kHz
24 Hz - 2 kHz
4Ω
99 dB
101 dB
1800 W
1800 W
The MD-S215 and MD-S218 subwoofers offer dual
15" or 18" front-loaded transducers, respectively.
Large centrally located vents with radiused
terminations eliminate port turbulence and noise.
Transducers feature technically advanced 4" voice
coils assembled with proprietary high temperature
adhesives, vented ceramic magnet assemblies and
highly optimized motor design to provide high linear
excursion, low power compression, flat frequency
response and a very low distortion figure.
132 dB
134 dB
140 dB
3600 W
Peak 4
138 dB
Recommended Amplifier Power
Input Connectors
Enclosure
3600 W
Speakon® and terminal strip
Suspension Points
Finish
16 load-rated pick points that accept 3/8"-16 threaded hardware
Wear resistant textured paint, available in black and white
Powder-coated perforated steel
Grille
Dimensions (HWD)
26" x 40" x 23.3"
(660 mm x 1016 mm x 591 mm)
28" x 48" x 24"
(711 mm x 1219 mm x 610 mm)
Weight
180 lbs (82 kg)
200 lbs (91 kg)
1) Groundplane
2) AES1984 50 - 500 Hz
ModularDesign is a trademark of QSC Audio Products, Inc.
Speakon is a trademark of Neutrik
3) Calculated based on sensitivity and continuous power handling capacity
4) Calculated based on sensitivity and 6 dB peak-to-average ratio of signal used for continuous power handling test
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