Next PROAUDIO M804DSP Manual de usuario

INSTALLATION GUIDE / USER MANUAL

M804DSP

Technical and Safety Notices

Please read the following important technical, safety

and environmental notices before installing and using

your amplier.

Technical Notices

All reasonable design and engineering steps have been taken

to ensure that these ampliers always perform satisfactorily

in their intended application and environment and will provide

appropriate levels of support to ensure that all reasonable

customer needs and expectations are met. Such support

however is contingent on the following provisions.

1. These ampliers are Class-I products and should be installed

with a mains cable including the required earth connection to

comply with the Safety Class-I.

2. These ampliers should always be installed by competent

and qualied personnel. Amplier damage or failure caused

by installation or operational errors may invalidate support,

warranty or guarantees of performance.

3. These ampliers are not suitable for use in locations where

they may be accessible to minors.

4. These ampliers are intended to be used specically for the

amplication of audio signals and for connection to moving-coil

loudspeaker systems. Use of these ampliers for amplication

of signals outside the audio band (20Hz to 20kHz) or to drive

transducers other than moving-coil loudspeakers may invalidate

support, warranty or guarantees of performance.

5. These ampliers should only be used within professionally

installed and congured audio systems comprising input

and output ancillary equipments that is known to be of an

appropriate level of performance and in good operating

condition. Any damage to, or unsatisfactory performance from,

these ampliers caused by inadequate or failed input or output

ancillaries may invalidate support, warranty or guarantees of

performance.

6. These ampliers are intended to be installed and operated

indoor in a controlled environment (pollution degree, PD2)

within an ambient temperature range of 0°C to 40°C. These

ampliers are not intended for use above 2000 meters above sea

level. Ampliers installed or operated in environments outside

these limits may invalidate support, warranty or guarantees of

performance.

7. Specic warranty terms are the responsibility of the amplier

re-seller.

Safety and Environmental Notices

Note: The intent of the lightning ash with arrowhead symbol in a

triangle is to alert the user to the presence of uninsulated “dangerous”

voltage within the product’s enclosure that may be of sufcient

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.

WARNING! TO PREVENT FIRE OR ELECTRIC SHOCK,

DO NOT EXPOSE THIS EQUIPMENT TO RAIN OR

MOISTURE.

Ambient Temperature Note: If this equipment is

operated in a conned or multiple rack installation, the

internal ambient operating temperature may exceed

the external ambient temperature. It is

important to ensure in these circumstances

that the published maximum operating

temperature for the equipment is not

exceeded.

Reduced Air Flow: Ensure that rack or

other closed installation does not restrict

the cooling airow required for safe and

reliable operation of the equipment.

Technical and Safety Notices

Important Safety Instructions

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 equipment in water or liquids.

7. Do not use any aerosol spray, cleaner, disinfectant or

fumigant on, near or into the equipment.

8. Clean only with a dry cloth.

9. Do not block any ventilation opening. Install in accordance

with the manufacturer’s instructions.

10. Do not install near any heat sources such as radiators, heat

registers, stoves, or other apparatus (including ampliers)

that produce heat.

11. To reduce the risk of electrical shock, the power cord shall

be connected to a mains socket outlet with a protective

earthing connection.

12. 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 t into your outlet, consult an electrician for

replacement of the obsolete outlet.

13. Protect the power cord from being walked on or pinched

particularly at plugs, convenience receptacles, and the point

where they exit from the apparatus.

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

15. Only use attachments/accessories specied by the

manufacturer.

16. Unplug this apparatus during lightning storms or when

unused for long periods of time.

17. Refer all servicing to qualied 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.

18. The appliance coupler, or the AC Mains plug, is the AC mains

disconnect device and shall remain readily accessible after

installation.

19. Adhere to all applicable, local codes.

20. Consult a licensed, professional engineer when any doubt or

questions arise regarding a physical equipment installation.

Environmental Statement

This product complies with international

directives, including but not limited to the

Restriction of Hazardous Substances (RoHS)

in electrical and electronic equipment, the

Registration, Evaluation, Authorization and

restriction of Chemicals (REACH) and the

disposal of Waste Electrical and Electronic Equipment (WEEE).

Consult your local waste disposal authority for guidance on how

properly to recycle or dispose of this product.

Introduction and Overview

1. Introduction

M804DSP power ampliers have been designed to

provide congurable, consistent and reliable high

performance audio power amplication for residential,

commercial and entertainment applications.

This manual covers the features, installation and

functions of the M804DSP IP500.2, IP800.2, IP500.4

and IP800.4 models. Please read the manual fully

before installing and using an amplier. If you have any

questions regarding amplier conguration, installation

or operation please contact the appropriate customer

support portal.

Following this introduction, the manual is divided into sections

covering the following topics:

• 2. Overview

• 3. Carton Contents

• 4. Installation

• 5. Conguration

• 6. Connections

• 7. Operation

• 8. Specications

2. Amplier Overview

M804DSP ampliers are a full rack width, 2U format power

ampliers that can drive both conventional low impedance (Lo-Z,

4Ω to 16Ω) loudspeakers and high impedance (Hi-Z, 70V/100V)

transformer coupled loudspeakers. They provide four analog

inputs, one stereo S/PDIF digital input, and either two or four

outputs (Lo-Z mode), or one or two outputs (Hi-Z or Lo-Z BTL

mode). M804DSP amplier model output channel counts and

power outputs are as follows:

M804DSP

Mode Channels Max Rated Output per Channel

Lo-Z Four 750 Watts

Lo-Z (BTL) Two 1500 Watts

Hi-Z Two 1500 Watts

Note: In Lo-Z BTL (bridge-tied load) mode, two amplier output

channels are combined to create a single, double power output

channel. BTL mode can be engaged via the amplier Output Mode

conguration setup menu described in Section 5 of this manual.

2.1 Connections and Power Switching

M804DSP signal input and output connections are accomplished

via RCA Phono and Euroblock style connectors. A GPIO (General

Purpose In/Out) Euroblock connector enables some amplier

functions to be controlled externally, and wireless or RJ45

socket Ethernet network connection options are also provided.

Cable connectors and connections are described and illustrated

in Section 6 of this manual

M804DSP ampliers incorporate a front panel mounted power

button. Press the button once to switch the amplier on or off.

Amplier power management behaviour can be congured via

the Control web app Settings Menu described in Section 5 of

this manual.

Introduction and Overview

2.2 Network Features

M804DSP ampliers are TCP/IP network connected devices

that require a wired or wireless network connection to access

their conguration menus. The conguration menus are

accessed via the Control Web App interface and cover Input,

Zone, Output and General Settings functions. The Control

web app conguration menus are described in Section 5 of this

manual.

2.3 Firmware

This manual describes the features, functions and user interface

of M804DSP ampliers running Firmware Version 1.4.0.

It is strongly recommended that the rmware version installed

in the amplier in use is checked initially, and regularly

thereafter. If updated rmware is available, the amplier

should be updated as a priority.

The rmware installed in the amplier can be identied and

updated by selecting the Device option in the Control web app

Settings Menu. Firmware versions can be checked, and rmware

downloaded, from the website:

https://www.nextaudiogroup.com/en/product/m804-dsp

3. Carton Contents

M804DSP ampliers are shipped in a cardboard carton

containing the amplier unit, a mains cable appropriate for the

sales territory, an accessory pack, and a document pack. The full

contents is listed below.

• Amplier unit

• Rack mount ears (tted)

• Mains power cable

• Input connector x 2

• GPIO socket connector

• Output connector x 1 or 2

• Adhesive rubber feet x 4

• Document pack

Installation

Diagram 4A

M804DSP ampli er dimensions.

(Shaded area de nes ventilation space.)

440 mm

17.3 in

332 mm

13.1 in

4. Installation

4.1 Ampli er Location

M804DSP ampli ers are shipped with rack “ears” attached and

are primarily intended for standard (19 inch)equipment rack

installation. If not to be installed in an equipment rack, M804DSP

ampli ers can be placed free-standing on a  at surface. Adhesive

rubber feet are supplied for this purpose.

It is important that any installation provides space for air ow

through the ventilation apertures at the front and rear of the

ampli er. This is illustrated in Diagram 4A.

88 mm

3.5 in

Conguration

5. Conguration

Before making input, output and GPIO connections,

an initial M804DSP amplier conguration should

be established. It is particularly important that the

amplier output format is congured appropriately for

the speakers that are to be connected.

Conguration requires that M804DSP ampliers are

connected to mains power, switched on and connected

to network services. These connections are described in

the following two sections.

5.1 Mains Power Connection

M804DSP ampliers incorporate a power factor corrected

power supply and can be used with mains input voltage from

100V AC to 240V AC, 50/60Hz. Use the mains cable supplied

with the amplier and connect it to a mains supply.

Press the front panel power button to switch on the amplier.

After a short delay the front panel Status indicator will illuminate

green.

5.2 Network Services

M804DSP ampliers are congured via the Control

Web App interface. Before the Web App conguration

menus can be accessed, M804DSP ampliers must be

connected to the same TCP/IP network as the computer

or mobile device that is to be used for conguration.

5.2.1 Wired (Ethernet) Network Connection

To connect a M804DSP amplier to a TCP/IP network using a

wired connection (Ethernet) follow the steps below.

1. Use an Ethernet cable to connect the M804DSP amplier

rear panel Network Control socket to a free socket on a network

router or switch, or directly to an Ethernet equipped laptop or

desktop computer.

2. Connect the M804DSP amplier to mains power using the

supplied mains cable. Wait for the front panel Network indicator

to illuminate green to indicate that the amplier has network

connectivity.

3. The M804DSP amplier default LAN IP address is

192.168.64.100. Congure the laptop or desktop computer

for a xed IP address in the same IP range; eg. 192.168.64.10,

with Subnet mask of 255.255.255.0 (or prex 24) and set the

Gateway to 192.168.64.1.

4. Open a laptop or desktop web browser and enter the address

http://192.168.64.100. The Control Web App interface will

open to enable amplier conguration as required.

Note: M804DSP ampliers can be congured to use DHCP for

network connection if required. However, if a M804DSP amplier

using DHCP is power cycled, it is possible that the TCP/IP network

router will assign it a different IP address, leaving its conguration

page inaccessible via the previous address. If this occurs, a network

scanning app can be used to identify the new IP address. DHCP and

Fixed IP address option settings can be found in the Settings Tab

menu described in Section 5.3.

5.2.2 Wireless (WiFi) Network Connection

To connect a M804DSP amplier to a TCP/IP network using a

wireless connection (WiFi) follow the steps below.

1. With the M804DSP amplier connected to mains power, wait

for the front panel WiFi indicator to illuminate green.

2. Use a mobile, laptop or desktop device to search for available

WiFi networks. Connect to, NEXT-proaudio M804DSP (product

serial number)’ using the password, ‘password’. The amplier

serial number can be found on its rear panel.

3. Open a computer or mobile device web browser and enter the

IP address: 192.168.4.1. The Control Web App interface will

open to enable amplier conguration as required.

4. Select the Web App Settings Tab followed by WiFi > WiFi

Mode > Client to congure the amplier to connect to the

required WiFI network. The WiFi network name and password

will be required.

It is strongly recommended that the M804DSP amplier

Access Point WiFi password is changed following initial

wireless connection.

Conguration

5.3.1 Input Tab

The Input Tab provides the following conguration parameters

for each amplier input channel:

• Input name

• Mono/Stereo selection

• Input sensitivity

• High-pass lter

• Gain trim

• Five band equalisation

The Input Tab also enables input signals to be mixed and routed

to specic amplier zones. The mix function enables any

amplier input, including stereo or split mono S/PDIF inputs,

to be grouped with any other input or inputs to create multiple

predened mixes.

Note: The number of individual mixes possible is equal to the number

of amplier analogue inputs.

Note: Mix inputs are muted by default with their level adjustment

sliders set to zero.

Mix operations take place following high-pass lter, input

equalisation and mono/stereo selection.

Diagram 5A

Conguration Dashboard display

Diagram 5B

Input Tab display

(two inputs only shown)

Input name - type to edit

Select mono or stereo

Select input sensitivity option

Adjust input gain

Open EQ window

Adjust zone volume

Note: When adjusting input gain, the input level display should

remain green. If it displays red, the input gain should be reduced.

5.3 Conguration Menus

Opening a web browser that is network connected to a

M804DSP amplier initially displays the M804DSP Control

Web App Dashboard illustrated in Diagram 5A. The Dashboard

is the ‘home’ page from which all other conguration options can

be accessed.

The Dashboard displays the amplier status, output zones and

the conguration menu tabs. It also enables immediate access

to zone volume control The functions available under each

conguration menu tab are described in the following sections.

Select input type

Conguration

Diagram 5C

Input EQ display

Diagram 5D

Input Mix display

A pink noise or sine wave audio signal generator, appropriate for

audio system testing and set up, can also be enabled, disabled,

and adjusted for gain and frequency via the Input Tab. Diagrams

5B, 5C and 5D illustrate the Input Tab, Input EQ and Input Mix

displays respectively.

5.3.2 Zone Tab

The Zone Tab enables installation zones to be dened and named,

and provides access to further sub-menus. Zones might be bar or

restaurant areas for example, or different rooms in a home. For

all Zone Tab menus, the installation zone under conguration is

selected by highlighting one of the zone identiers (A, B, C or D)

at the top of the display. Diagram 5E and 5F illustrates the Zone

Tab and Source menu displays.

• The Source menu enables inputs to be assigned to zones and

Input Priority or Input Ducking to be congured. The Input

Priority function enables an alternative input to replace

and mute the input primarily routed to the zone under

conguration when the alternative input exceeds a preset

level.

The Input Ducking function enables an alternative input to

replace and attenuate the input primarily routed to the zone

under conguration when the alternative input exceeds a preset

level.

Zone name - type to edit

Select zone

Select mix function

Select mono or stereo

Select zone input

Congure zone volume options

Congure zone restrictions

Congure zone compressor

Adjust zone volume

Diagram 5E

Zone Tab display

Select and adjust required EQ stages

Mix name - type to edit

Adjust mix input level

Conguration

Note: Input Priority and Input Ducking parameters can be either set

to default values or their Threshold, Attack, Hold and Release values

set as required. Input Priority can also be set to ignore the volume

level set for the specied zone and take a specic override volume.

• The Volume menu allows minimum and maximum zone

volume limits to be set, and enables external GPIO volume

control to be applied to individual zones. The GPIO

conguration menu can be found under the Settings Tab,

and notes on connecting an external volume control via the

GPIO interface can be found in Section 5.5 of this manual.

Note: If an amplier is controlled via a third-party control system API,

volume level limits set via the Input Tab will not apply.

• The Restrictions menu enables zone inputs or input mixes to

be restricted from routing to particular zones.

Note: Routing restrictions cannot be applied to priority zone inputs.

Note: If an amplier is controlled via a third-party control system API,

input routing restrictions set via the Input Tab will not apply.

• The Compressor option enables default or custom signal

compression to be applied to individual zones.

Note: Compression can be useful to reduce the volume difference

between loud and quiet audio material. The lower the compression

threshold is set, the more the difference between loud and soft will

be reduced. The overall zone volume may need to be increased

when compression is used. The default compression parameters are

appropriate for most installations.

5.3.3 Output Tab

The Output Tab enables amplier outputs to be named, linked

to zones, and provides access to Delay, Equalizer and Speaker

Preset menus. Diagram 5G illustrates the Output Tab display.

For all Output Tab menus, the amplier output under

conguration is selected by highlighting one of the output

identiers (1, 2, 3 or 4) at the top of the display.

Note: The number of individual outputs available for conguration

will depend on the M804DSP amplier model and the input, zone

and output mode conguration.

• The Routing menu enables zones to be assigned to amplier

outputs.

Note: Routing for zones specied as stereo will automatically offer

three output options: left channel, right channel or summed mono.

The summed mono signal can potentially be used to drive a mono

subwoofer.

• The Delay menu enables delay to be applied to individual

amplier outputs.

Output name - type to edit

Select output

Enable and congure output delay if required

Dene output routing

Enable and congure output EQ if required

Congure and manage speaker presets

Diagram 5G

Output Tab display

Diagram 5F

Zone Source menu display

Select zone

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