QSC Audio MD-LP115 - Manual

The MD (ModularDesign) Series Powered Loudspeakers
combine the superb loudspeaker performance of MD
with the latest generation of QSC’s legendary amplification
and signal processing technologies. For more detail about
the PM modules, see the rear page.
MD Powered offers exceptional performance in a wide
variety of applications, including houses of worship,
performing arts facilities, hotels, casinos, night clubs, and
sporting facilities. Specifying MD Powered is appropriate
anywhere there is a need for dependable high
performance loudspeakers with predictable coverage,
extended frequency response and the precision of
integrated power amplification and signal processing.
For design/build contractors and electroacoustic design
consultants, the MD Powered Series offers an effective
solution to the myriad of challenges encountered in the
design and implementation of permanently installed
sound reinforcement systems.
The MD-LP115 and MD-LP118, share the common
form factor of the full-range systems in the MD Powered
Series. All share the same 35" tall, 30° trapezoidal
enclosure as their passive MD Series counterparts.
The form factor common to all MD loudspeaker models
makes creating full range or combined full range/low-
frequency clusters painless. 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. Each
enclosure is equipped with a total of fifteen 3/8"-
16 threaded attachment points offering the installer
tremendous flexibility in suspension and mounting.
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.
MD Powered Series
ModularDesign™ Loudspeakers
Features of the MD Powered Series
• PM1400 Power Modules offer state-of-the-art integration of amplification
and signal processing in an extremely compact, lightweight package
• Available in either black or white finishes (handles on black only)
• All MD Series enclosures employ the same overall dimensions and
identical attachment point locations
• All models constructed in a trapezoidal design of multi-ply birch with a
powder coated steel grille
Features of Patented* PM1400 Power Module
• 1400 watts of continuous power at 4 ohms
• Class D switching technology
• 120V and 230V models available
• Accepts balanced XLR input connector with
pass-through connector
• Integrated active crossover & equalization electronics
• Internal limiters prevent over driving the system
MD-LP115 | MD-LP118
MD-LP115 MD-LP118
Configuration 15" long-throw woofer with
4" voice coil, aluminum
demodulating ring 18" long-throw woofer with
4" voice coil, aluminum
demodulating ring
Frequency Response (±3dB) 1 38 Hz - 100 Hz 36 Hz - 100 Hz
Frequency Range (-10 dB) 1 35 Hz - 110 Hz 33 Hz - 110 Hz
Maximum Output
Continuous
2
Peak 3
123 dB
129 dB 125 dB
131 dB
Amplifier Module
Power Output
5 800 W at 8Ω
Input Sensitivity 1.2 Vrms (+4 dBu)
Input Clipping 7.5 Vrms (+19.5 dBu)
Input Impedance 20k ohms
Input Connector Balanced XLR female (Pin 1: Earth, Pin 2: +, Pin 3: -)
Output (loop-thru) Connector XLR male wired in parallel with input
AC Power Connector
Neutrik ® Powercon (10' (3 m) #18 AWG 120V North American cordset)
Controls Gain control, 100 Hz low-pass filter, Power on/off
Indicators Clip/Limit (red LED) / Signal (green LED) / AC Power (blue LED)
Protection Thermal limiting, on/off muting, AC inrush current limiting
Operating Voltages Available in 120V or 230V versions (+15% -40%)
AC Power Requirements 6
Pink Noise
(6 dB crest factor)
Typical Program Material
at Full Power
Idle < 0.5 A (< 100 BTU waste heat) • 1/8 power 2.5 A (570 BTU waste
heat) • 1/3 power 5.0 A (1380 BTU waste heat) • Full Power 15.0 A
(4010 BTU waste heat)
2.5 A (570 BTU waste heat)
Enclosure
Suspension Points
15 load-rated attachment points that accept 3/8"-16 threaded hardware
Finish Wear resistant textured paint. Available in black and white (handles on
black only)
Grille Powder-coated perforated steel with black foam backing
Dimensions (HWD) 35" x 20.5" x 18" (889 mm x 521 mm x 457 mm)
Weight 96 lbs (43.6 kg) 95 lbs (43.2 kg)
All amplifiers are FCC class B (conducted and radiated emissions), UL/CE listed
1) Free Field Response (4pi) 2) Calculated based on sensitivity and continuous amplifier power at onset of limiting
3) Calculated based on sensitivity of transducers and peak output capability of amplifier
4) Coverage: Included angle between -6 dB points, 500 to 3.2k Hz, taken at ISO preferred one-third octave intervals, or for an
otherwise specified frequency range 5) Amplifier Power: The maximum sustained power at less than 1% clipping, averaged over the
intended frequency range 6) Current values are for 120V, for 230V operation divide by 2