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TD-001572-01-A
Introduction
Thank you for choosing a QSC MP-A Series amplifier. This manual provides a comprehensive guide to the features and functions of the MP-A20V, MP-A40V,
and MP-A80V amplifiers. Please read through this manual in its entirety to become fully acquainted with its functions and configuration options.
The MP-A Series power amplifiers are designed for Background Music and Paging applications. With class-D output circuitry, a switch mode power
supply with active PFC, and Auto-standby power saving, the MP-A Series offer high efficiency and low cost of ownership. These amplifiers provide a
unique FlexAmp™ circuit topology that enables each pair of channels to deliver up to 400 Watts of total power in any ratio. This FlexAmp technology
when combined with the ability to drive any type of output load (4 Ω, 8 Ω, 70 V, 100 V) ensures extreme flexibility. Other useful features of the MP-A
Series include an 80Hz high-pass filter per channel, a remote standby contact, and amplifier status output for 3rd party system monitoring.
This manual was created for the MP-A20V, MP-A40V, and MP-A80V models. Any reference to “MP-A Series” in this manual refer to all models in the range.
FlexAmp™ Technology
FlexAmp technology simplifies system design by allowing a single amplifier with multiple
channels to meet the needs of systems that would typically require several amplifiers
of different power levels. FlexAmp technology achieves this by allowing the installer to
configure each pair of channels (e.g. ch 1-2, or 3-4, etc.) to deliver up to 400 W combined
output power, in any mix. This makes for an amazing amount of flexibility, especially when
paired with the output mode switch that offers settings for 4 Ω, 8 Ω, 70 V and 100 V.
The MP-A series includes an 80 Hz high-pass filter for each output, as well as a remote
input for putting the amplifier into standby mode for fire safety systems, and an amplifier
status signal on the remote output for system verification.
Figure 3 is an example of the versatility of the MP-A Series, Imagine the MP-A40V in a typical restaurant scenario:
• Channel 1 is set up in 70 V mode with the high-pass filter engaged, driving a pair of Hi-Z ceiling loudspeakers, transformer taps set at 10 W, in
the rest rooms
• Channel 2 is set up in 4 Ω mode driving a pair of Lo-Z, 150 W subwoofers for the main dining room.
• Channel 3 is set up with the high-pass filter engaged, 70 V mode, and four Hi-Z ceiling loudspeakers, transformer taps set to 50 W in the main
dining room.
• Channel 4 is in 4 Ω mode driving two Lo-Z (8 Ω), 75 W surface-mount loudspeakers on the patio.
— Figure 2 —
400W
100W
300W
400W
350W
300W
250W
200W
150W
100W
50W
0 W
400W
350W
300W
250W
200W
150W
100W
50W
0 W
Channel 1
Channel 2
— Figure 3 —
CH 1
CH 2
CH 3
CH 4
DIP=70 V / HPF = On
Loudspeaker Taps = 10 W
Total Power = 20 W
DIP = 4Ω
Subwoofers = 150 W ea.
Total Power = 300 W
DIP = 70 V / HPF = On
Loudspeaker Taps = 50 W
Total Power = 200 W
DIP = 4Ω
(two 8Ω in parallel)
Loudspeakers = 75 W ea.
Total Power = 150 W
Channel 3 + Channel 4 ≤ 400 W
Channel 3
Channel 1
Channel 2
Channel 4
Channel 1 + Channel 2 ≤ 400 W
