QSC Audio Portable Speaker MD F122 124r User Guide

MD Series  
ModularDesign Loudspeakers  
MD-F122/64r | MD-F122/94r | MD-F122/124r | MD-F152/64r  
MD-F152/94r | MD-F152/124r | MD-L115 | MD-L118  
Features  
• All full range and low-frequency enclosures employ the same  
overall dimensions and identical attachment point locations  
• All full range models feature a rotatable high-frequency  
horn, enabling them to be utilized in a vertical or  
horizontal configuration  
• All models constructed in a trapezoidal design of multi-ply  
birch with a powder coated steel grille  
• Available in either black or white finishes  
The ModularDesign™ Series offers exceptional  
90° x 40° and 120° x 40° are available with  
either low-frequency complement. In addition,  
Each enclosure is equipped with a total of  
fifteen 3/8"-16 threaded attachment points  
offering the installer tremendous flexibility in  
suspension and mounting.  
performance in a wide variety of applications,  
including houses of worship, performing arts  
facilities, hotels, casinos, night clubs, and sporting  
facilities. Specifying MD Series is appropriate  
anywhere there is a need for dependable high  
performance loudspeakers with predictable  
coverage and extended frequency response. For  
design/buildcontractorsandelectroacousticdesign  
consultants, the MD Series offers an effective  
solution to the myriad of challenges encountered  
in the design and implementation of permanently  
installed sound reinforcement systems.  
two low-frequency only MD systems, the  
MD-L115 and MD-L118, share the common  
form factor of the full-range systems. All share  
the same 35" tall, 30° trapezoidal enclosure as  
their MD Powered Series counterparts.  
Low-frequency transducers feature technically  
advanced 4" voice coils assembled with  
proprietary high temperature adhesives, vented  
magnet assemblies and highly optimized  
motor design to provide excellent dynamic  
range, flat frequency response and a very low  
distortion figure.  
The form factor common to all MD loudspeaker  
models makes creating full range or combined  
full range/low-frequency clusters painless.  
The enclosures are designed with 30° angles;  
wall-to-wall tight packing enclosures splay the  
60° x 40° horns perfectly and provide uniform  
coverage in any multiple of 60° to 360°. No  
gaps or spacers are required and the radial  
form of the front surface of the enclosures  
forms a contiguous cylindrical surface for a  
clean and aesthetically pleasing appearance.  
High-frequency compression drivers feature a  
Neodymium magnet motor structure and 65  
mm (2.5") aluminum voice coil and titanium  
diaphragm plus a pole piece mounted copper  
shorting cap for extended HF response.  
Designed as a family of modular, arrayable  
loudspeakers, the full-range MD family  
includes six models: three models with 12"  
LF sections, and three with 15" LF sections.  
Nominal coverage patterns of 60˚ x 40°,  
ModularDesign is a trademark of QSC Audio Products, Inc.  
 
Specifications  
MD-F152/94r  
MD-F152/124r  
MD-L115  
MD-L118  
Configuration  
Low-frequency  
15" transducer with 4" voice  
coil, ferrite magnet  
15" transducer with 4" voice  
coil, ferrite magnet  
15" long-throw woofer with  
4" voice coil, aluminum  
demodulating ring  
18" long-throw woofer with  
4" voice coil, aluminum  
demodulating ring  
High-frequency  
90° x 40° rotatable horn with  
1.4" exit dia., 2.5" voice coil,  
neodymium magnet  
120° x 40° rotatable horn with  
1.4" exit dia., 2.5" voice coil,  
neodymium magnet  
Frequency Response (-6 dB)1  
Frequency Range (-10 dB)1  
Impedance  
50 Hz - 17 kHz  
45 Hz - 20 kHz  
50 Hz - 17 kHz  
45 Hz - 20 kHz  
48 Hz - 1.8 kHz  
35 Hz - 1.9 kHz  
55 Hz - 2.2 kHz  
45 Hz - 2.5 kHz  
Passive  
8Ω  
8Ω  
8Ω  
8Ω  
Biamp  
8Ω LF / 8Ω HF  
8Ω LF / 8Ω HF  
Sensitivity 2  
Passive  
96 dB  
96 dB  
96 dB  
98 dB  
Biamp  
96 dB LF / 109 dB HF  
96 dB LF / 107 dB HF  
RMS Power Handling  
Passive3  
Biamp4  
400 W  
400 W  
900 W*  
900 W*  
500 W LF / 63 W HF  
500 W LF / 63 W HF  
Maximum Output at 1 m  
Passive - Continuous5  
- Peak6  
122 dB  
122 dB  
125.5 dB  
127.5 dB  
128 dB  
128 dB  
131.5 dB  
133.5 dB  
Biamp - Continuous5  
- Peak6  
123 dB LF / 127 dB HF  
129 dB LF / 133 dB HF  
123 dB LF / 125 dB HF  
129 dB LF / 131 dB HF  
Recommended Amplifier Power  
Passive  
800 W  
800 W  
1800 W  
1800 W  
Biamp  
1
000 W LF / 125 W HF  
90° x 40°  
1000 W LF / 125 W HF  
120° x 40°  
Nominal Coverage (-6 dB)  
Enclosure  
Input Connectors  
Suspension Points  
Finish  
Terminal strips  
15 load-rated attachment points that accept 3/8"-16 threaded hardware  
Wear resistant textured paint. Available in black and white (handles on black only)  
Powder-coated perforated steel with black foam backing  
Grille  
Dimensions (HWD)  
35" x 20.5" x 16.67"  
35" x 20.5" x 16.67"  
35" x 20.5" x 16.67"  
35" x 20.5" x 16.67"  
(889 mm x 521 mm x 423.4 mm)  
(889 mm x 521 mm x 423.4 mm)  
(889 mm x 521 mm x 423.4 mm)  
(889 mm x 521 mm x 423.4 mm)  
Weight  
85 lbs (38 kg)  
85 lbs (38 kg)  
90 lbs (41 kg)  
89 lbs (40 kg)  
1) Free Field Response (4π)  
2) 1W, 1M Free-Field (4π) except MD-L115 and MD-L118, which are groundplane measurements  
3) Measured per AES1984  
4) AES1984 50 - 500 Hz (LF), 1 - 10 kHz x (HF); Power = V2 / Zmin  
5) Calculated based on sensitivity and continuous power handling capacity  
6) Calculated based on sensitivity and 6 dB peak-to-average ratio of signal used for continuous power handling test  
* AES1984-2, 40 - 400, 2 hours; Power = V2 / Zmin  
Specifications subject to change without notice.  
 
Dimensions  
MD Series  
Loudspeakers  
Top  
5"  
127 mm  
5.6"  
5"  
127 mm  
142.2 mm  
9.24"  
234.7 mm  
8.88"  
225.6 mm  
20.5"  
521 mm  
60°  
1.75"  
44.5 mm  
15.75"  
400.1 mm  
35"  
889 mm  
15.75"  
400.1 mm  
Front  
Side  
Back  
Specifications subject to change without notice.  
1675 MacArthur Boulevard • Costa Mesa, CA 92626 • Ph: 800/854-4079 or 714/957-7100 • Fax: 714/754-6174  
qscaudio.com  
MD Series Spec Sheet 04/06/06  
 

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