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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