DMA8825 - Receiver PHONIC - Free user manual and instructions

Product Type	Digital Matrix Amplifier
Model	DMA8825
Brand	Phonic (by Asystems)
Channels	8 inputs (Euroblock + RCA), 8 amplified outputs (Euroblock)
Power Output (Stereo, 8Ω)	150W per channel, all channels driven
Power Output (Stereo, 4Ω)	250W per channel, all channels driven
Power Output (Bridge, 8Ω)	500W per channel (4 bridged pairs)
Distributed Output	250W per channel at 70.7V/100V
Dimensions (W x H x D)	483 x 89 x 394 mm (19" x 3.5" x 15.5")
Weight	9.53 kg (21 lbs)
Power Supply	120/230 VAC, 50/60 Hz, 15A Edison
Input Connections	3-pin Euroblock (balanced/unbalanced) + stereo RCA
Output Connections	3-pin Euroblock (amplified and line-level)
Digital I/O	AES/EBU input/output, Word Clock (BNC)
Network	Ethernet RJ-45 (100Base-T), Dante optional (DT44/DT88 card)
DSP	40-bit floating point, sample rate 44.1/48 kHz
Built-in Processing	4-band parametric EQ, 31-band graphic EQ, compressor, limiter, ALC, ducker, feedback silencer, crossover, signal generator
Control	Onboard via VGA + USB mouse, Windows software, optional RM-2VR/RM-4/RM-6E remotes
Rack Mount	2U, 19-inch standard rack
Cooling	Temperature-dependent speed-controlled axial fan
Protection	Inrush current limit, temperature monitoring, over-current protection, mains fuses
Safety	Class I, grounded plug; do not expose to moisture; disconnect mains before cleaning
Cleaning	Use only dry cloth; no liquid or aerosol cleaners
Spare Parts / Accessories	Expansion cards (DT44/DT88), remote controls (RM series), USB mouse, VGA monitor (not included)
Warranty	Refer to manufacturer (Asystems)

Frequently Asked Questions - DMA8825 PHONIC

How do I reset the DMA8825 to factory defaults?

Use a paperclip to press the pinhole Reset Button on the front panel. This restores all settings to factory defaults.

How do I connect the DMA8825 to a network for PC control?

Connect an Ethernet cable from the ETHERNET port to your PC. Set your PC's IP address to 192.168.10.3, then launch the DMA software and enter IP 192.168.10.200, username USER 1, password ASYSTEMS.

How do I bridge two output channels?

Wire the '+' of the odd channel to the '+' of the next even channel; the even channel's '+' becomes the '-'. Then in the Control Panel tab of the software, click the Bridged button for that channel pair.

How do I use the ducking feature?

Enable Duck in the Channel In Matrix or output matrix. In the Ducker menu (Global Settings), set the Source (trigger signal), Threshold, Depth (attenuation), Attack and Release times.

How do I schedule an event (e.g., power on/off)?

Go to the Events tab. Set Date, Time, Type (e.g., Power Change), Action (On/Standby), and Period (Once, Daily, Weekly). Click Save.

How do I update the firmware?

Save the firmware file to a FAT32-formatted USB drive. Insert it into a USB port on the rear panel. Go to Utility and click Update. After update, click Initialize to reset (save scenes first).

What is the Dante card option and how do I install it?

The DT44 (4x4) or DT88 (8x8) Dante card adds networked audio streaming. Remove the cover plate at the rear, insert the card, and secure the screws. Configure routing in the Network Matrix tab.

How do I clean the DMA8825?

Unplug the unit. Use a dry cloth to wipe the exterior. Do not use aerosol or liquid cleaners. Ensure ventilation openings are not blocked.

What does the PROTECT LED indicate?

The PROTECT LED lights when the amplifier's protection circuitry is active (e.g., over-current, overheating). Check the Protect menu in the software for real-time temperature and wattage details.

Can I use the DMA8825 with a condenser microphone?

Yes. In the Global Settings > Analog In menu, enable +48V phantom power for the desired input channel. Also adjust trim and high-pass filter as needed.

USER MANUAL DMA8825 PHONIC

Abstract black geometric logo resembling the letter 'A' on white background (no text or symbols)

SYSTEMS

INSTALLATION AND SETUP 5

RACK MOUNTING....5

CONNECTION 5

DIGITAL I/O EXPANSION CARD 6

IMPORTANT SAFETY INSTRUCTIONS

The apparatus shall not be exposed to dripping or splashing and that no objects filled with liquids, such as vases, shall be placed on the apparatus. The MAINS plug is used as the disconnect device, the disconnect device shall remain readily operable.

Warning: the user shall not place this apparatus in the confined area during the operation so that the mains switch can be easily accessible.

1. Read these instructions before operating this apparatus.

2. Keep these instructions for future reference.

3. Heed all warnings to ensure safe operation.

4. Follow all instructions provided in this document.

5. Do not use this apparatus near water or in locations where condensation may occur.

6. Clean only with dry cloth. Do not use aerosol or liquid cleaners. Unplug this apparatus before cleaning.

7. Do not block any of the ventilation openings. Install in accordance with the manufacturer's instructions.

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

9. 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 is provided for your safety. If the provided plug does not fill into your outlet, consult an electrician for replacement of the obsolete outlet.

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

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

12. Use only with a cart, stand, tripod, bracket, or table specified by the manufacturer, or sold with the apparatus. When a cart is used, use caution

when moving the cart/apparatus combination to avoid injury from tip-over.

1. Unplug this apparatus during lighting storms or when unused for long periods of time.

1. Refer all servicing to seavified 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.

CAUTION: TO REDUCE THE RISK OF ELECTRIC SHOCK, DO NOT REMOVE COVER (OR BACK) NO USER SERVICEABLE PARTS INSIDE REFER SERVICING TO QUALIFIED PERSONNEL

The lightning flash with arrowhead symbol, within an equilateral triangle, is intended to alert the user to the presence of uninsulated "dangerous voltage" within the product's enclosure that may be of sufficient magnitude to constitute a risk of electric shock to persons.

The exclamation point within an equilateral triangle is intended to alert the user to the presence of important operating and maintenance (servicing) instructions in the literature accompanying the appliance.

WARNING: To reduce the risk of fire or electric shock, do not expose this apparatus to rain or moisture.

CAUTION: Use of controls or adjustments or performance of procedures other than those perceived result in hazardous radiation exposure.

1. INTRODUCTION

Congratulations on your purchase of a DMA series digital matrix amplifier. The DMA's flexible deisgn will provide you with up to eight channels of audio matrixing and processing. A single DMA amplifier offers eight-in, eight-out support (or eight-in, four-out), and the entire system can be controlled through standard potentiometers, remote controls or flexible remote software. Internal processing is accomplished through a high quality 40-bit floating point processor, with internal signal processors and matrix routing all handled with ease.

DMA digital matrix amplifiers offer easy, effective means for injecting signal processors directly into your input and output path, with clear, easy-to-use software both onboard and on your Windows computer. The software offers full performance monitoring for each processor, giving real-time information on the load placed upon DSPs.

2. FEATURES

• 8 input channels available via 3-pin Euroblock connections and stereo RCA inputs
  • Full control possible through onboard software accessed with VGA display and USB mouse connected
• Built-in multi-channel amplifier for low-impedance or line distribution application*
• For power output levels for individual models, please consult the Specifications on page 17
• 40-bit floating point processor with internal sampling selectable between 44.1 and 48 kHz
• Optional 4x4 or 8x8 networking capabilities through audio streaming LAN card
  • Digital AES/EBU input and output connectors
• Auto shutdown mode for reduced power consumption
• Ethernet connectivity for network and internet control application
  • Automatic DHCP network IP configuration
• Easy and intuitive control software from Asystems
  • Event scheduling and user-accounts
• 4-band parametric EQs and 31-band graphic equalizers
• Adjustable compressors and limiters built-in
  • Feedback silencing technology seeks and destroys feedback
• User-defined crossovers available on output channels
  • Autoleveler (Loudness Control)
  • Level ducking with trigger control

*Operating mode is dependent on purchased model.

3. CONTROLS AND I/O

FRONT PANEL

1. Mounting Holes

These holes are for mounting the DMA device in a standard 19" rack.

2. Output Level Control Knobs

Every output channel is equipped with a rotary knob for adjusting the final output level. These controls can be deactivated within the DMA software.

3. OUT LED

Every output channel is equipped with a 4-segment IN LED level meter, including a CLIP/PROTECT indicator.

4. BRIDGE LED

This LED lights when the two corresponding channels are bridged with one another.

NOTE: Every input channel is equipped with one output level control knob, one IN LED and 1 level meter. Each channel pair features a BRIDGE LED.

5. Cooling Inlet Vents

Cool air is drawn in here. Please do not cover these vents for any reason as you risk overheating the DMA.

6. Reset Button

A pinhole button is included for resetting the DMA series matrix amplifier to the factory default settings.

7. Indicators

POWER: Lights when the device is on.

DISABLE: Lights when the power switch is disabled.

STANDBY/UNLOCK: Lights when DMA device is in the Standby mode.

PROTECT: Lights when the protect circuitry is active.

8. Power Switch

Flick this switch to turn the unit on and enter it into STANDBY mode. Please note that this switch can be disabled through the onboard software. If the power switch becomes unresponsive, check your power settings.

WARNING: The DMA requires up to 2 minutes to be fully discharged after the power is turned off. During this time the system cannot be powered on properly.

REAR PANEL

The Asystems DMA8825, DMA8813, DMA8425 and DMA8413 share the same basic I/O design and layout. The major difference is that the DMA8825 and DMA8813 have 8 speaker output connectors and 8 line-out connectors, while the DMA8425 and DMA8413 have 4 speaker output connectors and 4 line-out connectors (as shown below).

1. AC Power Connector

This power inlet is for connecting a standard IEC power cable. Under no circumstances should the user remove the grounding pin on the power cable.

2. AES/EBU Connector

For connecting AES/EBU-enabled devices.

3. RS-232 Connector

For remote control through non-Ethernet based hardware that utilizes a RS-232 control data protocol. This feature is only found on the DMA8825. A detailed protocol document can be found on the Asystems website.

4. VGA Connector

Connect this port to an appropriate video screen to view the DMA's internal software. This can be controlled by any connected wired or wireless mouse.

5. SD Card Slot

Insert an SD card here to play digital audio files.

6. WCLK Connector

This port is for connection of a master clock, enabling multiple digital audio devices to be perfectly synchronized.

7. USB Ports

These USB ports are for connection of a standard wired or wireless USB mouse for stand-alone control of the internal software. The second USB port can be used when performing firmware updates.

8. SPEAKER OUTPUTS (Amplified Output)

For connecting passive loudspeakers.

9. PERIPHERAL Connector

For connecting the Asystems RM-6E programmable remote control (sold separately).

10. PRESET RECALL Connector

For connecting Asystems' RM-4 series remote preset recall control (sold separately).

11. REMOTE LEVEL CONTROL Connector

For connecting Asystems' RM-2VR series remote level control (sold separately).

12. INPUT Connectors

Two types of input connectors are offered - Euroblock and unbalanced RCA.

13. OUTPUT Connectors

DMA matrix amplifiers adopt 3-pin Euroblock output connectors for line-level output. These can be used as balanced or unbalanced connections (see section "Audio Output" on page 6 for more).

14. DIGITAL I/O Expansion Card Slot

This slot is for installing Asystems' DT44 or DT88 Dante Networking card to enable the DMA as a networking portal to other Dante-enabled devices.

15. ETHERNET Connector

RJ-45 connector for connecting the DMA8825, DMA8813, DMA8425 or DMA8413 to a PC or local area network.

4. INSTALLATION AND SETUP

4.1 RACK MOUNTING

DMA8825, DMA8813, DMA8425 and DMA8413 are compatible with standard 19" audio equipment racks. Slide the DMA in to the rack and secure it with four Phillips screws and appropriate square nuts. The DMA matrix amplifiers all take up 2 standard units of rack space.

Front view of a server rack with indicator lights and a warning symbol (no readable text or labels)

4.2 CONNECTIONS

Connect all necessary input and output devices.

AUDIO INPUT

Input can be achieved through correctly wiring the Euroblock connectors and RCA connectors

Euroblock Connectors RCA Connectors

Balanced

PIN 1: Shield/Ground

PIN 2: Cold (-)

PIN 3: Hot (+)

Unbalanced

PIN 1: Shield/Ground

PIN 2: Link to PIN 1

PIN 3: Hot (+)

AUDIO OUTPUT

AMPLIFIED OUTPUTS

These euroblock outputs are used to connect speakers, either in low-impedance or distributed lines depending on your model. Amplified outputs are wired like so:

PIN 1: Cold (-)

PIN 2: Hot (+)

Each pair of amplified output channels can be bridged into one channel. This combines the output power of both channels creating a single channel with twice as much power.

To bridge channels, just wire the "+" pin of an odd-numbered channel to the "+" pin of the next even channel. When bridged, the "+" pin of the even channel becomes the "-" pin of the bridged new output.

When activating bridge mode, be sure to go into the Control Panel menu of the DMA software and click the corresponding "Bridged" button.

AUX OUTPUTS

Offering line-level signals, AUX OUTPUT connectors can be wired as either as balanced or unbalanced connections.

Balanced

PIN 1: Shield/Ground

PIN 2: Cold (-)

PIN 3: Hot (+)

Unbalanced

PIN 1: Shield/Ground

PIN 2: Link to PIN 1

PIN 3: Hot (+)

DIGITAL I/O EXPANSION CARD

1. Loosen the two screws and remove the cover plate.

1. Connect the DT44 or DT88 Dante Networking card.

1. Tighten the two screws back to secure the cover plate.

ONBOARD CONTROL

DMA8825, DMA8813, DMA8425 and DMA8413 include built-in control software. You can get full control over the DMA matrix amplifier via the control software by plugging in a standard VGA display and a USB mouse to the ports shown below.

REMOTE CONTROL

1. RM-2VR REMOTE LEVEL CONTROL

Please connect Asystems' RM-2VR Remote Control to the REMOTE LEVEL CONTROL connectors of the DMA matrix amplifier. The channels controlled by the VR is determined by the wiring of the control. Please note, the ground for channel 2 is internally wired to channel 1. Only one grounding pin needs to be connected to the DMA.

In the example found to the right, channels one and two can be remotely controlled using the RM-2VR.

2. RM-4 REMOTE PRESET RECALL CONTROL

With Asystems' RM-4 Remote Preset Recall connected to the PRESET connector and some configurations within the control software, 4 presets can be accessed via pressing a button. See page 15 for more information on setting presets.

3. RM-6E PROGRAMMABLE REMOTE CONTROL

The Asystems RM-6E Programmable Remote Control can be connected to the PERIPHERAL connector on the rear of the DMA. The DIP switch on the RM-6E determines which communication port the remote will use (see configurations below). Up to 6 functions can be programmed to be controlled remotely using the RM-6E. See page 16 for more information.

4. WINDOWS-BASED PC

DMA8825, DMA8813, DMA8425 and DMA8413 can be controlled via a connected Windows-based PC.

1. Connect the Ethernet port of the DMA to the Ethernet port of your computer with a CAT5 RJ-45 Ethernet cable.

1. On your PC, right click your network icon and select "Open Network and Sharing Center".

1. Double click your main connection located next to the "Connections".

1. Click "Properties" Properties button.

1. Select "Internet Protocol Version 4 (TCP/IPv4)" and then click the "Properties" button.

1. Change the field "IP address" to "192.168.10.3", and then click "OK".

1. Within the Login box of the DMA software, enter the following:

IP Address: 192.168.10.200

User Name: USER 1

Password: ASYSTEMS

Hint: In the event you are unable to log in using any of the main user accounts, connect a monitor and mouse to the DMA digital matrix amplifier. This will allow you to view network settings while in stand-alone mode and reset all accounts.

1. Launch the control software by double clicking the executable file. The latest version of the DMA software can always be found on the Asystems website.

2. Click

5. CONTROL SOFTWARE

DSP

The DSP page will give you an overall profile of input and output mixes as well as assigned signal processors.

Name Cell: The white boxes at the left and right of each row will display the name of each input and output channel. Users can edit the name for each channel by double-clicking on the white box.

ON/OFF: This button will allow the user to switch the corresponding input channel on and off.

Signal Processor Cells: Every input/output channel has a row of four arrow shape cells. Assign any of the internal DSP functions by right-clicking any of these cells.

Channel In: Clicking the blue bar to the left of the screen will jump directly to the "Channel In Matrix" tab.

graph TD
    subgraph Channel_In
        CH1["CH1"] --> MixIn["Mix In"]
        CH2["CH2"] --> MixIn
        CH3["CH3"] --> MixIn
        CH4["CH4"] --> MixIn
        CH5["CH5"] --> MixIn
        CH6["CH6"] --> MixIn
        CH7["CH7"] --> MixIn
        CH8["CH8"] --> MixIn
    end

    subgraph Mix_Out
        CH1 --> ChannelOut["Channel Out"]
        CH2 --> ChannelOut
        CH3 --> ChannelOut
        CH4 --> ChannelOut
        CH5 --> ChannelOut
        CH6 --> ChannelOut
        CH7 --> ChannelOut
        CH8 --> ChannelOut

    end

    style Channel_In fill:#f9f,stroke:#333
    style Mix_In fill:#ccf,stroke:#333
    style Channel_Out fill:#cfc,stroke:#333
    style DSP_1Usage fill:#fff,stroke:#000
    style DSP_2Usage fill:#fff,stroke:#000

Mix In/Mix Out: Clicking this red bar allows the user to jump directly to the "Mix Matrix" tab.

Channel Out: Clicking this green bar allows the user direct access to the "Control Panel" tab.

Clear: Clicking this button resets all DSP configurations.

Channel In Matrix

In this page, you can assign any input source to any input channel by clicking the corresponding cell in the cell matrix.

Example:

The image below shows how to assign input source 1 and 2 to Channel In 1, and Input source 2 to Channel In 2.

Grid background with eight numbered rows and two highlighted blue squares (no text or symbols)

Meter Pre/Meter Post: This buttons sets all input sources to pre/post, determining whether or not they are affected by on-screen faders or not.

Analog In and Network In: Use these two buttons to view analog input sources connected via rear panel, as well as digital input sources from the Dante card.

PAN: This sliding control is used to adjust the left/right mix of the input signals.

ALC: Select this button to enable Automatic Level Control on the corresponding channel.

DUCK: Select this button to enable the ducking function on the corresponding channel.

INV: Select this button to invert the phase of the corresponding channel.

ON: Select this button to turn the corresponding signal on and off.

CLEAR: Clicking this button erases all assigned input/output routing.

Mix Matrix

In this page, you can assign which input sources are sent to the main mix outputs. All controls within the Mix Matrix are as the same as those found under the Channel In Matrix tab (page 10), except:

Analog In, Network In and Mix In: Use these three buttons to view analog input sources connected via rear panel, digital input sources from the Dante card and input signal processed in the Channel In Matrix tab.

Auto Mixer: When this function is enabled, ALC and DUCK work simultaneously.

Network Matrix

In this page, you can assign which kind of input source to be output via the connected Dante card. All controls are as same as controls under the Channel In Matrix tab (page 10), except:

Channel Out: To view output channel (the last output control in the signal path) effected by the Control Panel tab.

LIM: To enable/disable the built-in Limiter.

AES/EBU Matrix

Within the AES/EBU Matrix page, you can assign which input sources are sent to the AES/EBU output mix. All controls are as same as those under the Channel In Matrix tab (page 10) and Network Matrix tab (above).

AES/EBU signals can be synced using the WORD CLOCK input. For system clock settings, see page 15.

Control Panel

The control panel menu offers complete control of input channels. This menu includes level and gain controls, metering, and a host of other parameters that can be edited.

Channel Name: A pre-selected channel name can be viewed or edited in this screen.

Fader: The input level can be adjusted using this onscreen fader.

OUT: The input and output signal level of the channel can be viewed through these meters. They can be adjusted between pre- and post-fader meters.

GR: The gain reduction meter will provide a real-time indication of any reduction in gain applied by the internal DSP processes (including compressors-limiters, equalizers, etcetera).

Limiter: This button will activate the internal limiter function for the corresponding channel.

Pre/Post: This button allows you to adjust the output meter between a pre-fader and post-fader meter.

Duck: Activate the 'ducking' feature by pushing this button. The duck function can be activated as ducker 1, ducker 2, or off, the settings of which are decided by their respective menus.

INV: This button will invert the phase of the corresponding signal.

ON/OFF: This button will turn the corresponding channel on and off.

Bridged: When the speaker outputs are wired for bridge mode, users must push this button to bridge the outputs of the two channels.

Network

There are two pages under this tab.

Security

The menus found under this page may vary depending on the method of control being used.

Onboard Control

User Account Profile

You can create user accounts within this tab. Once a User Name and Password are defined, click "SAVE" to store.

Remote Control From PC

Enter necessary information to log in. Default values are:

IP Address: 192.168.10.200

User Name: USER 1

Password: ASYSTÉMS

Events

In the Events menu you will be able to set up a number of events to occur at a particular time of day. Events can range from simply powering on and off the device to activating audio files at a particular time.

Current Time & Current Date: Here users can set the current date and time. Click the Save button to set these settings. The date and time will be maintained within the DMA amplifier provided power is supplied to the device, whether active or in standby mode.

Time Format: Set the time format to 12/24 Hour time.

Schedule: Any Events already set will be displayed here.

Number: Assign a number to the event you're currently setting.

Subject: Provide a name or description to your event.

Location: Describe the location of where the event will occur.

Date: Set the date to begin your event.

Time: Set the time the event should occur, down to the very second.

Type: Select the type of event you are setting here. Available types include power change, channel mute, relay and SD card (typically for initiating audio playback).

Action: The action can be selected between on and standby.

Period: In the period section you will be able to set whether to set your event to occur once, weekly, daily, etc. You can also pick the days of the week for it to occur.

Global Settings

Analog In

Each of the analog inputs can have +48V of phantom power applied to it, ideal for condenser microphones. This menu also allows the user to trim the signal slightly if levels are too excessive.

A high-pass filter can also be added to each of the analog inputs to help remove stage rumble and other unwanted noise.

Global In On/Off

This menu provides each individual button input, including the analog inputs, network inputs, AES/EBU inputs and signal generator.

Ducker

The ducker allows a signal to temporarily attenuate below another signal when said signal activates the ducking feature. This is useful when making announcements and other such times when a signal needs to be heard clearly. The ducker can be activated on input and output channels by pushing the 'Duck' buttons found in the individual Matrix control pages. There are two of these 'duckers' total on the DMA.

Source: This is used to select the source of the duck function; i.e. the trigger signal. When the selected source's signal rises to a user-selected level, the currently selected 'duck' signals will attenuate at the selected level.

Threshold: This determines the level that the source signal needs to be before the ducking function will be activated.

Depth: This determines how much the selected 'duck' signals will be attenuated.

Attack: The attack time is the time it takes for the ducking feature to kick in after the source signal passes the selected threshold.

Release: The release time control will determine the time the 'duck' feature will remain active as the source signal drops back below the set threshold.

ALC – Auto Level Control

An autoleveler will allow users to dynamically change the level of an input or output signal to match a predefined level set by the user. The autolevel function can be activated for each individual mix in the matrix pages. The settings for these autolevelers can be found within this ALC menu.

In Target: The target level setting allows users to select the desired signal level for their autoleveler. All signals that are processed by the autoleveler will essentially aim for the target level.

Below Target: The below target threshold of the autoleveler is the point at which the autoleveler will kick in. Signals below the threshold will not be affected, but signals above will be have their gain increased.

Ratio: The ratio is the input level change in decibels to the output level change in decibels.

Increase Gain: The increase gain determines the amount that the signal can be increased to meet the target level. This helps prevent sudden, alarming changes in audio level.

Decrease Gain: The decrease gain works the same as the decrease gain, but in reverse. It determines the amount a signal can be cut.

Hold Time: This determines the time the ALC will remain engaged after the signal falls back below the determined threshold.

LIM/COMP - Limiter/Compressor

This menu allows compressors and limiters to be applied to channel outputs, network outputs or AES/EBU outputs.

Limiter Threshold: This control determines the threshold for the limiter function. This means that no signal will surpass the selected threshold, being 'compressed' at a ratio of infinity:1.

Compressor Threshold: Use this control to set the threshold of the compressor function. Any signals that surpass the selected threshold will be compressed at the selected ratio.

Compressor Ratio: This control can be used to set the ratio for the compressor. The ratio is expressed as :

.

Compressor Attack: This control adjusts the attack time of the compressor, essentially determining the time taken for the compressor to kick in after it passes the selected threshold.

Compressor Release: The release control determines the time the DMA will wait before disengaging the compressor when the signal bypasses the selected threshold.

Side Chain HPF: This allows users to set a high pass filter on these channels to essentially help rid these channels of low-frequency noise.

System

System Clock: This menu allows you to select a master clock source for digital devices. Selecting 44.1 or 48 kHz will set the DMA as the master clock source and determine the sampling rate. Selecting AES/EBU, Network, or Word Clock will set these as the master clock. Whenever a new clock source is selected, the ENTER button must be pushed to confirm.

Power Settings: There are three power settings on the DMA. The software power can be turned on and off, essentially enabling the DMA to be turned on and off via the software – including event scheduling. The hardware power can be selected on and off, essentially allowing the unit to be activated and deactivated using the hardwired switch on the front of the DMA.

Relay (GPIO)

The GPI – or General Purpose Interface – output is used to remotely control the DMA digital matrix amplifier. The relay page itself is used to setup the GPIs, including any and all remote controls connected to the unit.

The Preset panel is for use with the RM-4 remote preset controllers. The numbers in the "Port" field correspond with the ports on the rear of the DMA amplifier. The "No" field is the "Scene" number found in the utility tab. Any of your pre-saved scenes can be assigned to the available ports.

RM Control

This page offers a number of assignment options for the Asystems RM remote controls, specifically the RM-6E (sold separately). Each of the "Keys" listed in this page will correspond with a button on the RM-6E. Beside each key users will be able to select the function. This may be gain control, input/output mute, matrix mixing, etc. The last field will allow users to select a 'source' related to their selected function. For example, if "Gain Control" is selected, users will be able to select which input channel's gain is adjusted when that key is selected on the remote.

Up to 8 RM-6E remotes can be used at any one time. Each should be set to a different port to help identify it. Individual remotes can be locked using the corresponding buttons within the RM Control menu. Port settings for the RM-6E can be found on page 8.

Utility

All of the DSP processes can have their settings saved for later use. While there are a number of factory presets available, users are always encouraged to find their own settings and save them for later use. The DMA has onboard storage for a number of settings to be saved, or users can connect USB flash drives to save settings.

Also available in the Utility menu is a firmware update button. When a new version of firmware is available it can be installed using the "Update" button. Place the firmware update file on a formatted USB flash drive and insert it into a USB port. The "Update" button should take care of the rest. After the firmware is updated, the initialize button can be selected to reset the device. Save any settings (or "scenes") before initializing the system.

Protect

The protect menu gives real-time updates on the system performance. Everything from the system temperature to the output wattage is represented on this page. If the Protect LED on the front of the DMA amplifier lights up, this menu can be viewed to better understand the issue.

SPECIFICATIONS

DMA8413 DMA8425 DMA8813 DMA8825
Low Z, Stereo Mode, all channels driven	RMS Power Output Per Channel
8Ω, 20Hz-20kHz 1% THD	80W 150W 80W	150W
4Ω, 20Hz-20kHz 1% THD	130W 250W 130W	250W
Low Z, Bridge Mode, all channels driven	RMS Power Output
8Ω, 20Hz-20kHz 1%THD	260W 500W 260W	500W
70.7V, 100V distributed output RMS	Power Output Per Channel
20Hz-20kHz 1%THD, per channel	130W 250W 130W	250W
Models Available	4Ω and 8Ω70.7 / 100V Constant Voltage	4Ω and 8Ω70.7 / 100V Constant Voltage	4Ω and 8Ω70.7 / 100V Constant Voltage	4Ω and 8Ω70.7 / 100V Constant Voltage
Line Current Draw(all channels driven)
Line Current, Standby mode	190mA 190mA	190mA 190mA
Line Current, Idle (no signal)	540mA 540mA	540mA 540mA
Line Current, Typical(1/8 power pink noise)	2.85A 2.85A	2.85A 2.85A
Line Current, Maximum(1/3 power sine wave)	6.00A 6.00A	6.00A
Signal to Noise(20Hz-20KHz, unweighted)	>110dB >110dB	>110dB >110dB
Distortion (SMPTE, typical) - 8 ohm load, 10dB below rated power	<0.5% <0.5% <0.5%	<0.5%
Distortion (THD-N, typical) -8 ohm load, 10dB below rated power, 20Hz-20kHz	<0.5% <0.5% <0.5%	<0.5%
Frequency Response	20Hz-20kHz, +/-1dB 20Hz-20kHz, +/-1dB 20Hz-20kHz, +/-1dB 20Hz-20kHz, +/-1dB
Damping Factor (8 ohm load,<1kHz)	>250 >250 >250	>250
Input Impedance	20K Ohm, balanced 20K Ohm, balanced 20K Ohm, balanced 20K Ohm, balanced
Maximum Input Level	+24dB +24dB +24dB +24dB
Cooling	Temperature dependent speed-controlled axial fan
Control Network	Onboard, compatible with standard 100MB Ethernet hardware
Front Panel Indicators	8 x Clip, -10dB, -20dB, Signal, Bridge (per pair) Power, Standby, Protect, Power Disable
Attenuators	8 x front panel, software, and remote
Input Connections	Euroblock & Stereo RCA	Euroblock & Stereo RCA	Euroblock & Stereo RCA	Euroblock & Stereo RCA
Output Connections	Euroblock	Euroblock	Euroblock	Euroblock
Amplifier Protection	Inrush current limitation, temperature monitoring, output over-current protection, mains fuses
Power Supply (Region Dependent)	120VAC, 230VAC, 50/60Hz,15A Edison cable
Dimensions (W x H x D)	483 x 89 x 394 mm(19" x 3.5" x 15.5")	483 x 89 x 394 mm(19" x 3.5" x 15.5")	483 x 89 x 394 mm(19" x 3.5" x 15.5")	483 x 89 x 394 mm(19" x 3.5" x 15.5")
Weight	9.53 kg (21 lbs)	9.53 kg (21 lbs)	9.53 kg (21 lbs)	9.53 kg (21 lbs)

PARAMETERS

Function Parameter Range
Compressor / Limiter	Compressor Threshold -50 dB to 0 dB
	Ratio 1:1 to 20:1
	Limiter Threshold -50 dB to 0 dB
	Output Gain 0 dB to 18 dB
	Attack / Release 1 ms to 8 seconds
Gate	Threshold -50 dB to 0 dB
	Range -90 dB to 0 dB
	Attack / Hold / Release 1 ms to 8 seconds
Expander	Threshold -50 dB to 0 dB
	Ratio 1:1 to 20:1
	Attack / Release 1 ms to 8 seconds
Delay	Delay Time (mS) 0.0 to 680.0 ms
	Delay Time (meters) 0.0 to 245.5
	Delay Time (feet) 0.0 to 805.4
	Temperature (C) 0° to 50°
	Temperature (F) 32° to 122°
4-band Equalizer	Type	BPF, Notch, Peak, HPF, LPF, High Shelf, Low Shelf
	Gain	-18 dB to +18 dB
	Frequency	20 Hz to 20 kHz
	Q	0.1 to 10
31-band Graphic EQ	Frequencies	20 Hz to 20 kHz
	Range	-12dB to +12dB
	Q	1.6 to 10
Filters	Type	HPF (6 dB, 12 dB, 18dB, 24dB), LPF (6 dB, 12 dB, 18dB, 24dB), High Shelf, Low Shelf, Peak, APF, BPF, Notch
	Gain	-18 dB to +18 dB
	Frequency	20 Hz to 20 kHz
	Q	0.1 to 10
Feedback Silencer	Threshold -50 dB to 0 dB
	Release Time	10 sec/dB to 300 sec/dB
	Gain	-20 dB to 0 dB
	Frequency	20 Hz to 20 kHz
	Q	4.5 to 10
VCA	Gain	-∞ to 6 dB
Automatic Level Control	In Target 0 dB to -50 dB
	Below Target -30 dB to 0 dB
	Ratio	1:5~20:1
	Increase Gain	40ms/dB to 1000ms/dB
	Decrease Gain	1000ms/dB to 40ms/dB
	Hold Time	0s to 10s
Ducker	Source	Analog 1 to 8, Network 1 to 8, AES/EBU
	Threshold -50 dB to 0 dB
	Depth	-80 dB to 0 dB
	Attack / Release	0.2s to 20s
Crossover	HPF / LPF Type	Butterworth 12dB, 18dB, 24dB
	HPF / LPF Frequency	20 Hz to 20 kHz
Signal Generator	Sine Wave Frequencies	20Hz to 20KHz
	Sweep Wave Start/End Frequencies	20Hz / 20KHz
	Sweep Wave Hold Time	50ms to 2000ms
	Signal Level Range -60dB to -10dB

ÍNDICE

INTRODUCCIÓN....21

CARACTERÍSTICAS....21

Front view of a server rack with indicator lights and a logo, mounted on two side rails (no text or symbols visible)

4.2 CONEXIÓN

3. CONTROL REMOTO PROGRAMABLE RM-6E

Eventos/Events

ALC – Auto Level Control

Utility

Protect

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SYSTEMS

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