CONTENTS

 

INTRODUCTION

2

SYSTEM FEATURES

3

MPA-400 USER CONTROLS AND CONNECTIONS

4

TRANSMITTER USER CONTROLS AND CONNECTIONS

5

SYSTEM OPERATION AND SETUP

6

STAND MOUNTING THE MPA-400

7

WIRED AND WIRELESS OPERATION

8

SAFETY TIPS AND WARNINGS

9

SPECIFICATIONS

10

SERVICE INFORMATION

10

WARRANTY

11

INTRODUCTION

Thank you for purchasing a Nady MPA-400 Wireless Portable Megaphone P.A.—and congratulations on your choice. The megaphone horn-type loud speaker is suitable for use in area with high ambient noise levels. Ideal for many applications, including use in outdoor gatherings, classrooms, conference/meeting rooms, churches, health clubs and small auditoriums. It is powerful, yet lightweight and easily portable with its attached shoulder strap. We are sure you will find this versatile system a powerful and useful tool for your presentations.

USING THIS MANUAL

This booklet provides information regarding the use of the MPA-400 wireless megaphone system. It includes detailed instructions, description of features and step-by-step guides to operating. This should answer any questions about the operation and servicing of this system.

2

SYSTEM FEATURES

MPA-400 WIRELESS MEGAPHONE P.A.

Full-range megaphone speaker system with built-in Amplifier, Mixer, and High Band VHF Wireless Receiver

Powerful 40W audio power output

Wireless system features noise reduction companding circuitry for quietest operation with a wide dynamic range

WHT handheld Mic transmitter included. (1x MPA-400 megaphone receiver and 1x WHT transmitter on the same frequency comprises a system)

1/4” unbalanced input jack with volume and tone control for both wired and wireless microphone

Power/Charge/Low Battery LED Indicators

Convenient built-in rechargeable battery

Powered externally with 12V/3A DC power supply

Stand mountable with optional MPA-4S stand

Compact & lightweight- 7 x 9 x 11.5in (178 x 229 x 292mm) & 12.4 lbs (5.6kg): easily transportable with attached shoulder strap

WHT TRANSMITTER

The Nady WHT is a sleek tapered handheld microphone with these special features:

Features the Nady DM -10D unidirectional neodymium dynamic cartridge for optimum true sound, maximum feedback rejection and minimal handling noise

OFF/STANDBY/ON switch allows convenient audio muting with the transmitter “ON”

Low battery LED indicator flashes once for unit “ON”; lights steady for low battery alert

Operates up to 20 hours on a single 9 volt battery

3

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Nady Systems MPA-400 owner manual Contents, System Features

MPA-400 specifications

The Nady Systems MPA-400 is a versatile and powerful multi-channel amplifier designed for a wide range of applications in both live sound and installation scenarios. With its robust construction and innovative technology, the MPA-400 meets the demands of professional users seeking reliable performance and audio quality.

One of the standout features of the MPA-400 is its four-channel design, allowing it to drive multiple speaker systems simultaneously. Each channel is independently adjustable, which provides users with the flexibility to tailor the output to suit various speakers and acoustic environments. The amplifier delivers a total output power of 400 watts, ensuring ample headroom for dynamic performances and events.

The MPA-400 incorporates advanced cooling technology, including internal fans that maintain optimal operating temperatures. This feature not only extends the lifespan of the unit but also ensures consistent performance during extended use. The weighted internal components are designed to minimize noise interference, contributing to the unit’s clean and clear audio output.

In terms of connectivity, the MPA-400 offers a comprehensive array of options. It includes balanced XLR inputs for professional-grade microphones and instruments, as well as RCA inputs for connecting consumer audio devices. The outputs provide compatibility with a range of speaker configurations, making it suitable for both passive and active monitoring systems.

The amplifier is engineered with a built-in limiter, which prevents peak overload while maintaining signal integrity. This safeguard is especially beneficial in live sound applications, where sudden volume spikes can lead to distortion or speaker damage. Additionally, the unit features LED indicators for signal presence and clipping, allowing users to monitor performance at a glance.

Portability is another significant advantage of the MPA-400. Its compact chassis and lightweight design enable easy transportation, making it an ideal choice for mobile DJs, bands, and sound reinforcement professionals. The rugged construction ensures it can withstand the rigors of frequent travel and setup.

Overall, the Nady Systems MPA-400 stands out in the crowded field of audio amplifiers thanks to its power, flexibility, and reliability. Whether for live performances, recording sessions, or public address use, the MPA-400 provides an exceptional solution for elevating sound quality and delivering exceptional audio experiences. Its combination of features and technologies makes it a valuable asset for any audio professional.