QSC MP-A20V Users Manual

MP-A Series

User Manual

MP-A20V MP-A40V MP-A80V

®

TD-001572-01-A

*TD-001572-01*

EXPLANATION OF SYMBOLS

The term “WARNING!” indicates instructions regarding personal safety. If the instructions are not followed the result may be bodily injury or death.

The term “CAUTION!” indicates instructions regarding possible damage to physical equipment. If these instructions are not followed, it may
result in damage to the equipment that may not be covered under the warranty.

The term “IMPORTANT!” indicates instructions or information that are vital to the successful completion of theprocedure.

The term "NOTE" is used to indicate additional useful information.

NOTE: The intent of the lightning flash with arrowhead symbol in a triangle is to alert the user to the presence of un-insulated
"dangerous" voltage within the product's enclosure that may be of sufficient magnitude to constitute a risk of electric shock to humans.

NOTE: The intent of the exclamation point within an equilateral triangle is to alert the user to the presence of important safety, and
operating and maintenance instructions in this manual.

IMPORTANT SAFETY INSTRUCTIONS

WARNING!: TO PREVENT FIRE OR ELECTRIC SHOCK, DO NOT EXPOSE THIS EQUIPMENT TO RAIN
OR MOISTURE.
Elevated Operating Ambient – If installed in a closed or multi-unit rack assembly, the ambient operating
temperature of the rack environment may be greater than room ambient. Consideration should be
given to ensure that the maximum operating temperature range -10°C to 50°C (14°F to 122°F ) is not
exceeded. Reduced Air Flow – Installation of the equipment in a rack should be such that the amount
of air flow required for safe operation of the equipment is not compromised.

1. Read these instructions.

2. Keep these instructions.

3. Heed all warnings.

4. Follow all instructions.

5. Do not use this apparatus near water.

6. Do not submerge the apparatus in water or liquids.

7. Do not use any aerosol spray, cleaner, disinfectant or fumigant on, near or into the apparatus.

8. Clean only with a dry cloth.

9. Do not block any ventilation opening. Install in accordance with the manufacturer's instructions.

10. Keep all ventilation openings free of dust or other matter.

11. Do not install near any heat sources such as radiators, heat registers, stoves, or other apparatus (including amplifiers) that produce heat.

12. To reduce the risk of electrical shock, the power cord shall be connected to a mains socket outlet with a protective earthing connection.

13. Do not defeat the safety purpose of the polarized or grounding-type plug. A polarized plug has two blades with one wider than the other. A
grounding type plug has two blades and a third grounding prong. The wide blade or the third prong are provided for your safety. If the provided
plug does not fit into your outlet, consult an electrician for replacement of the obsolete outlet.

14. Protect the power cord from being walked on or pinched particularly at plugs, convenience receptacles, and the point where they exit from
theapparatus.

15. Do not unplug the unit by pulling on the cord, use the plug.

16. Only use attachments/accessories specified by the manufacturer.

17. Unplug this apparatus during lightning storms or when unused for long periods of time.

18. Refer all servicing to qualified service personnel. Servicing is required when the apparatus has been damaged in any way, such as
power-supply cord or plug is damaged, liquid has been spilled or objects have fallen into the apparatus, the apparatus has been exposed to
rain or moisture, does not operate normally, or has been dropped.

19. The appliance coupler, or the AC Mains plug, is the AC mains disconnect device and shall remain readily accessible after installation.

20. Adhere to all applicable, local codes.

21. Consult a licensed, professional engineer when any doubt or questions arise regarding a physical equipment installation.

TD-001572-01-A

2

Maintenance and Repair

WARNING!: Advanced technology, e.g., the use of modern materials and powerful electronics,
requires specially adapted maintenance and repair methods. To avoid a danger of subsequent
damage to the apparatus, injuries to persons and/or the creation of additional safety hazards, all
maintenance or repair work on the apparatus should be performed only by a QSC authorized service
station or an authorized QSC International Distributor. QSC is not responsible for any injury, harm or
related damages arising from any failure of the customer, owner or user of the apparatus to facilitate
those repairs.

FCC Statement

NOTE: This equipment has been tested and found to comply with the limits for a Class B digital device, pursuant to Part 15 of the
FCCRules.

These limits are designed to provide reasonable protection against harmful interference in a residential installation. This equipment generates, uses
and can radiate radio frequency energy and, if not installed and used in accordance with the instructions, may cause harmful interference to radio
communications. However, there is no guarantee that interference will not occur in a particular installation. If this equipment does cause harmful
interference to radio or television reception, which can be determined by turning the equipment off and on, the user is encouraged to try to correct
the interference by one or more of the following measures:

• Reorient or relocate the receiving antenna.

• Increase the separation between the equipment and receiver.

• Connect the equipment into an outlet on a circuit different from that to which the receiver is connected.

• Consult the dealer or an experienced radio/TV technician for help.

RoHS STATEMENT

The QSC MP-A20V, MP-A40V, and MP-A80V amplifiers are in compliance with European Directive 2011/65/EU – Restriction of Hazardous
Substances(RoHS2).

The QSC MP-A20V, MP-A40V, and MP-A80V amplifiers are in compliance with “China RoHS” directives. The following chart is provided for product
use in China and its territories:

QSC MP-A20V, MP-A40V, and MP-A80V Ampli󽗉ers

部件名称
(Part Name)

电路板组件
(PCB Assemblies)

机壳装配件
(Chassis
Assemblies)

O: 表明这些有毒或有害物质在部件使用的同类材料中的含量是在 SJ/T11363_2006 极限的要求之下。

(O: Indicates that this toxic or hazardous substance contained in all of the homogeneous materials for this
part is below the limit requirement in SJ/T11363_2006.)

X: 表明这些有毒或有害物质在部件使用的同类材料中至少有一种含量是在 SJ/T11363_2006 极限的要求之上。
(X: Indicates that this toxic or hazardous substance contained in at least one of the homogeneous
materials used for this part is above the limit requirement in SJ/T11363_2006.)

有毒有害物质或元素
(Toxic or hazardous Substances and Elements)

铅
(Pb)

X O O O O O

X O O O O O

汞
(Hg)

镉
(Cd)

六价铬
(Cr(vi))

多溴联苯
(PBB)

多溴二苯醚
(PBDE)

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What's in the Box

(1x)

MP-A20V
MP-A40V
MP-A80V

MP-A20V (x2)

MP-A40V (x4)
MP-A80V (x8)

Warranty TD-000453

(1x)

AC

Cord

(1x)

MP-A20V (2x)
MP-A40V (4x)
MP-A80V(8x)

Inputs (3-Pins)

Installation

Rack-Mounting

The MP-A amplifiers measure (HWD) 1.75 in x 19 in x 14.8 in (44 mm x 483
mm x 377 mm) and can be mounted into 1RU of a rack using four screws in
front, and four screws in the rear with the appropriate rear mounting support.

Ventilation

• The unit is cooled by a variable speed, thermally controlled fan which runs
faster as the temperature rises.

(1x)

Safety

Information

TD-000337

(1x)

Remote
(5-pins)

(1x)

Quick Start

Guide

TD-001507

MP-A20V (1x)
MP-A40V (2x)
MP-A80V(4x)

Outputs
(4-Pins)

NOTE: The MP-A Series of amplifiers are designed to
maintain proper operating temperatures utilizing convection
cooling via the aluminum chassis for typical background music
loads. The variable speed cooling fan(s) are thermally regulated
and operate only during sustained high power output levels and/or
high ambient temperature environments.

• It is recommend that you provide 1RU (1.75 in / 44.45 mm) space above
the amplifier.

• Minimum open space of 3 inches measured from back of amplifier.

NOTE: QSC System Power Amplifiers contain advanced protection circuitry which allows them to reduce output power in order
to maintain safe operating temperatures. Insufficient ventilation may result in the amplifier reducing output power during normal
operation (indicated by Limiter/Protect LEDs illuminating red). To reduce the possibility of thermal limiting, and allow proper heat
dissipation, we recommend that you keep the space directly above and to the rear of these amplifiers free ofobstacles.

— Figure 1 —

TD-001572-01-A

4

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.
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

FlexAmp

technology achieves this by allowing the installer to

Channel 1 Channel 2

300W

250W

200W

150W

100W

400W

350W

100W

50W

0 W

300W

400W

350W

50W

0 W

400W

— Figure 2 —

300W

250W

200W

150W

100W

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.

CH 2

CH 1

Channel 2

TD-001572-01-A

Channel 1 + Channel 2 ≤ 400 W

Channel 3Channel 1

DIP=70 V / HPF = On
Loudspeaker Taps = 10 W
Total Power = 20 W

DIP = 4Ω
Subwoofers = 150 W ea.
Total Power = 300 W

CH 3 CH 4

DIP = 70 V / HPF = On
Loudspeaker Taps = 50 W
Total Power = 200 W

— Figure 3 —

5

Channel 3 + Channel 4 ≤ 400 W

Channel 4

DIP = 4Ω
(two 8Ω in parallel)
Loudspeakers = 75 W ea.
Total Power = 150 W