Alldsp SMA-6P2408 Manuale utente

ALLDSP SMA-6P2408

User Manual

for

ALLDSP SMA-6P2408

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ALLDSP SMA-6P2408

Introduction

Congratulations on the purchase of your SMA-6P2408. ALLDSP strives to be the best in high end digital

audio processing. After you have become familiar with your System Amplifier, we encourage you to

experiment and find the most effective and efficient way to run your system by utilizing the powerful

processing of the SMA-6P2408.

The SMA-6P2408 is a powerful System Amplifier with four analog inputs, two AES3 inputs, two Dante inputs,

six outputs (2x2400W + 4x800W @ 4 Ohms), 10 PEQ bands per input and output and a frequency range up

to 40kHz. The rugged analog input stage accepts input voltages of up to +23dBu thus matching any source

on the market today, with an excellent dynamic range of 118dB. Using a switch-mode power supply for clean

power supply rails and superior ruggedness, 64-bit digital processing and some of the best converters

available on the market today, the SMA-6P2408 offers sound quality that sets standards in professional as

well as high-end home audio.

This User Manual describes how to operate the SMA-6P2408's settings via the front panel controls.

Alternatively, the SMA-6P2408 can be configured completely via a remote connection to a PC, MAC, iPad or

iPhone. Please refer to the Software User Manual for details on the remote control application.

Controlled via the front panel or via the remote control application, the DSP settings and coefficients are

calculated on-the-fly at the moment of changing the parameters. Frequencies can be set with 1Hz accuracy,

delays with 10 microseconds accuracy, and gains with 0.01dB accuracy. When editing values via the front

panel, some values are limited in granularity; e.g. gain is set via 0.25dB steps in this case.

Features:

- 2x2400W plus 4x800W output power @ 4 ohms, 2x1500W plus 4x500W output power @ 8 ohms

- 2 DANTE inputs

- 118dB dynamic range (inputs) / 114dB dynamic range (outputs)

- Electronically balanced inputs

- Matched-impedance outputs

- Frequency range 20Hz....40kHz

- 10 parametric filters per input and output

- EQs can be set as Bell, High Shelf, Low Shelf, Notch, Allpass, Band Pass, High Pass, Low Pass

- 2000ms delay per input, 2000ms delay per output

- Butterworth, Bessel, Linkwitz-Riley filters up to 24dB / oct.

- True RMS Compressor

- Zero Attack Peak Limiter

- Latency 660 microseconds

- Full configuration and real-time monitoring via PC, MAC, iPad or iPhone

- 100 Presets

- 64 bits multi-mode digital processing

- Loudspeaker Library support

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ALLDSP SMA-6P2408

Safety Instructions

WARNING, FOR YOUR PROTECTION READ THE FOLLOWING: The apparatus shall not be exposed to

dripping or splashing liquid and no object filled with liquid, such as vases, shall be placed on the apparatus.

CLEAN ONLY WITH A DRY CLOTH. DO NOT BLOCK ANY VENTILATION OPENINGS. INSTALL IN

ACCORDANCE WITH THE MANUFACTURERS INSTRUCTIONS. DO NOT INSTALL NEAR ANY HEAT

SOURCES SUCH AS RADIATORS, HEAT REGISTERS, STOVES, OR OTHER APPARATUS (INCLUDING

AMPLIFIERS) THAT PRODUCE HEAT. ONLY USE ATTACHMENTS/ACCESSORIES SPECIFIED BY THE

MANUFACTURER. UNPLUG THIS APPARATUS DURING LIGHTNING STORMS OR WHEN UNUSED

FOR LONG PERIODS OF TIME. 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 third prong is provided for your safety. If the provided plug does not

fit your outlet, consult an electrician for replacement of the obsolete outlet. Protect the power cord from being

walked on or pinched particularly at plugs, convenience receptacles, and the point where they exit from the

apparatus. Use only with the cart stand, tripod bracket, or table specified by the manufacture, or sold with the

apparatus. When a cart is used, use caution when moving the cart/apparatus combination to avoid injury from

tip-over. 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. POWER ON/OFF SWITCH: If the equipment has a Power switch, the Power switch used

in this piece of equipment DOES NOT break the connection from the mains. MAINS DISCONNECT: The plug

shall remain readily operable. For rack mount or installation where plug is not accessible, an all-pole mains

switch with a contact separation of at least 3 mm in each pole shall be incorporated into the electrical

installation of the rack or building. FOR PRODUCTS EQUIPPED WITH EXTERNALLY ACCESSIBLE FUSE

RECEPTACLE: Replace fuse with same type and rating only. MULTIPLE-INPUT VOLTAGE: This equipment

may require the use of a different line cord, attachment plug, or both, depending on the available power

source at installation. Connect this equipment only to the power source indicated on the equipment rear

panel. To reduce the risk of fire or electric shock, refer servicing to qualified service personnel or equivalent.

If connected to 240V supply, a suitable CSA/UL certified power cord shall be used for this supply. This

equipment is intended for rack mount use only.

WARNING: THIS APPLIANCE SHALL BE CONNECTED TO A MAINS SOCKET OUTLET WITH A

PROTECTIVE EARTHING CONNECTION. The cores in the mains lead are colored in accordance with the

following code: GREEN and YELLOW - Earth; BLUE - Neutral; BROWN - Live. As colors of the cores in the

mains lead of this appliance may not correspond with the colored markings identifying the terminals in your

plug, proceed as follows: The core which is colored green and yellow must be connected to the terminal in

the plug marked with the letter E, or with the earth symbol, or colored green, or green and yellow. The core

which is colored blue must be connected to the terminal marked N or colored black. The core which is

colored brown must be connected to the terminal marked L or colored red. This equipment may require the

use of a different line cord, attachment plug, or both, depending on the available power source at installation.

If the attachment plug needs to be changed, refer servicing to qualified service personnel who should refer to

the table below. The green/yellow wire shall be connected directly to the product's chassis.

WARNING: If the ground is defeated, certain fault conditions in the processor or in the system to which it is

connected can result in full line voltage between chassis and earth ground. Severe injury or death can then

result if the chassis and earth ground are touched simultaneously. The symbols shown above are

internationally accepted symbols that warn of potential hazards with electrical products. The lightning flash

with arrow point in an equilateral triangle means that there are dangerous voltages present within the

processor. The exclamation point in an equilateral triangle indicates that it is necessary for the user to refer to

the ownerâ€™s manual. These symbols warn that there are no user serviceable parts inside the processor.

Do not open the processor. Do not attempt to service the processor yourself. Refer all servicing to qualified

personnel. Opening the chassis for any reason will void the manufacturerâ€™s warranty. Do not get the

processor wet. If liquid is spilled on the processor, shut it off immediately and take it to a dealer for service.

Disconnect the processor during storms to prevent damage.

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ALLDSP SMA-6P2408

1. Overview of Connectors and Controls

In addition to the available features described in this manual, you also have the option of controlling the

processor remotely over your network. Please refer to the Software Manual for details.

1.1. Front Panel

1.1.1. Input VU Meters

There are four independent input meters available. The LEDs indicate the signal level at the inputs, in dBu,

after the input gain faders. The Peak LED lights when the input level exceeds +20dBu, and blinks slowly

when the input is muted.

1.1.2. Function Buttons: Menu, Exit

Press the Menu button to enter the System Menu. Press Exit to go one level up in the system menu or in the

channel menu.

See section three for a detailed description on the functions of each of these buttons.

1.1.3. Rotary Encoders

The rotary encoders have several functions, depending on the currently visible menu item on the LCD

display.

In the default state, push the encoder to mute or unmute the corresponding input. Push and hold the encoder

to enter the channel menu.

When setting items in the channel menu (e.g. gains etc), pushing a rotary encoder selects the corresponding

channel and shows the parameter on the screen.

When editing the system menu, only the encoder for channel 1 is active and is used to navigate the menu.

When values are changed, the DSP is updated in real-time.

1.1.4. Power Switch

The Power Switch turns the SMA-6P2408 on and off. Note: The power switch is not a hard mains switch.

When powered off, the amplifier still consumes some power. To completely power off the amplifier,

disconnect the mains cord.

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ALLDSP SMA-6P2408

1.2. Rear Panel

1.2.1. Power Connector

The SMA-6P2408 has an internal power supply that will accept voltages ranging from 100V - 240V at

frequencies from 50Hz-60Hz. A power cord is included.

1.2.2. Ethernet Connector

This RJ-45 connector is used to connect your product to a network. It can then be configured and controlled

in real time with our PC and MAC configuration program, or with our iPad / iPhone control software (available

on the Apple App Store). From the PC or MAC you can also update your System Amplifier to the latest

firmware. Please check our website regularly for updates.

1.2.3. DANTE Inputs

The SMA-6P2408 offers two Dante input channels. No separate connector is needed; the SMA-6P2408 uses

one Ethernet connection for Dante signals and Command & Control signals. The System Amplifier will accept

sample rates of 44.1, 48, 88.2, and 96kHz. The Dante inputs can be configured though Audinate's Dante

Controller Software. An internal asynchronous sample rate converter (ASRC) converts the sample rate to the

SMA-6P2408's native sample rate, thus preserving the highest possible processing quality even when

running off a 44.1kHz digital signal.

1.2.4. Analog inputs

The analog input section of the SMA-6P2408 offers four electronically balanced XLR connectors. The input

level is +23dBu max, electronically balanced.

1.2.5. AES3 Inputs

The digital input of the SMA-6P2408 offers two input channels on one electronically balanced XLR connector.

The input will accept AES3 input signals at 44.1, 48, 88.2, or 96kHz. An internal asynchronous sample rate

converter (ASRC) converts the sample rate to the SMA-6P2408's native sample rate, thus preserving the

highest possible processing quality even when running off a 44.1kHz digital signal.

1.2.6. Loudspeaker Outputs

The output section of the SMA-6P2408 offers six output channels, connected via 2 Speakon output

connectors. Channels 1, 3 and 5 are connected to Speakon connector 'Out 1', and channels 2, 4 and 6 to

connector 'Out 2'. This enables you to connect multi-way systems through a single multi-core Speakon cable,

while linking stereo channels. Typically, one would use channels 1 and 2 for Left Sub and Right Sub, etc.

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ALLDSP SMA-6P2408

2. Getting Started

2.1. Quick Start

For those of you that wish to jump right in, the following information has been provided to act as a quick start

guide for optimizing performance of your System Amplifier.

2.2. Connections

When setting up your System Amplifier, make connections as follows:

2.2.1. Signal Connections

- Always make input connections prior to applying power to the System Amplifier.

- Connect the output(s) from the sending device (mixer) to the Ch. 1 XLR input connector (mono) or both, Ch.

1 and Ch. 2 XLR input connectors (stereo).

- Switch your SMA-6P2408 on and make sure the inputs are muted (all 4 Peak LEDs on the front panel are

blinking).

- Make output connections from the output Speakon connector(s) to your loudspeakers.

Always make sure that your power amps are the last item turned on and the first turned off.

Once all of the connections have been made, and the SMA-6P2408 is powered up, you can navigate through

the input signal path of your System Amplifier from the front panel. The display provides you with a clear and

concise overview of each aspect of the signal path. To set loudspeaker configurations (output settings),

please use the remote control software as described in our Software Manual which can be downloaded from

our website.

2.2.2. Remote Monitoring and Control

For the quickest and easiest results we recommend to install and use our freely available iPad, iPhone, PC or

MAC configuration software. It provides a complete and comprehensive tool to make your loudspeaker

configuration settings, and to manage your presets.

When connecting the SMA-6P2408 via an Ethernet network, you have several options. The PC/MAC

application has an auto-discovery tool that will automatically connect to any unit found on the network.

Please refer to the Software Manual available on our website for details on the control software.

Note: Please make sure there is only one device (Windows PC, MAC PC or iOS device) running the ALLDSP

software at any time. The software can control as many devices simultaneously as the network can handle. In

a typical (default) DHCP configuration, this is 200 units.

2.2.2.1. Standard DHCP Network

This is the recommended connection method. For plug-and-play connection, use a standard Ethernet Router,

plug in the unit and your computer, and the connection should be made automatically. Standard routers have

a DHCP server built in and enabled. A DHCP server assigns a network address to your computer and to the

SMA-6P2408, allowing them to connect automatically.

2.2.2.2. Connection without DHCP server

Alternatively, you can use a direct (cross) cable or a simple Ethernet Switch to connect the unit to your PC or

MAC. Please note that in this case, especially Windows computers running Windows XP may take up to

several minutes to assign themselves a network address (indicated by the text: "This connection has limited

or no connectivity"). The computer and the SMA-6P2408 both will assign themselves a network address in

the ZeroConfig range (169.254.0.0 - 169.254.255.255), and the SMA-6P2408 will be discovered

automatically by the PC/MAC application. To facilitate connections without DHCP router, it may be

convenient to set your computer to a fixed IP address. If you do this, please choose any address in the

ZeroConfig range, and set the subnet mask to 255.255.0.0.

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ALLDSP SMA-6P2408

2.2.2.3. Fixed IP address

It is also possible to set a fixed IP address and subnet mask for the SMA-6P2408. WARNING: If you set a

wrong address (in a different range than your computer), you may not be able to connect anymore. It is

strongly recommended to consult a system administrator before making such settings. It is not possible to set

the IP address via the front panel menu. If you have set a fixed IP address and subnet mask, you must set

your computer to an address within the same subnet. To verify this, you can read out the IP address via the

local LCD display: Press "Menu" 4 times, then press the rotary encoder until the IP address and subnet mask

appear.

2.2.2.4. Firewall

After starting the software application for the first time, your computer may ask you to allow or block the

application access to the network. Please make sure to allow this; if there is a firewall between the application

and the SMA-6P2408, the application will not find the SMA-6P2408.

2.3. System Setup and Gain Structure

This product offers a wide range of tools for sound system design and setup. These tools can make your

system more efficient and better sounding, but to get the best possible sound it is important to use these tools

properly.

The following section explains how to maximize system gain and how to use the limiters to protect your

System Amplifier from clipping. In traditional system design, the output of your console would be routed to a

system EQ, a compressor, and a crossover with output level control. From the crossover, there may be

additional filters that are employed to improve the response of your speakers. There may also be

compressors and limiters set up to keep your amplifiers from going into clipping and protect your speakers

from the hazards of a clipped signal. All of these functions are available in the DSP of your SMA-6P2408.

Please refer to our software manual for details on these settings.

Your amplifiers play a vital role in system setup, because they are last item in the chain before your speakers

and offer the greatest amount of gain (that is their job after all). If your limiters and amplifiers are incorrectly

setup you will not be using your system to its fullest potential and could be harming your speakers.

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ALLDSP SMA-6P2408

3. Setup And Operation

Before plugging the System Amplifier in, always make sure that the power supply matches the product

specification voltage. Install this device on a flat, stable surface, not bent or curved. Do not supply power

before all components of the system are set up and connected properly. Make sure your power amplifiers are

switched on last in order to avoid transients, which could damage your speakers or annoy your audience.

3.1. System Check

After connecting all cables, you should mute all outputs first or turn the gain/level setting on your amplifiers to

minimum. Activate the HF-outputs first. In case of wrong cabling, High Frequency (HF) audio signals will

come out of bass-speakers that cannot be harmed this way. Vice versa, the Low Frequency (LF) audio

signals would destroy your HF-speakers. It is advisable to install a large capacitor in series with HF drivers

(47 - 100 uF). That way, drivers are somewhat protected against accidental instrumentation errors.

3.2. Input Setup

Press and hold the rotary encoder to select the input channel you wish to edit. To toggle through the different

items, turn the rotary encoder. To go one level down in the menu, press the rotary encoder. To go one level

up in the menu, press the Exit button.

3.2.1. Gain

Adjust the gain by dialing the rotary encoder. The gain is adjusted in steps of 0.25dB. Smaller steps (0.01dB)

can be set via the PC or MAC interface.

3.2.2. Input Selection

Select the source (Analog, AES3 or Dante) by rotating the encoder.

3.2.3. Delay

Set the delay time by turning the encoder. Select the displayed unit (ms or s, mm or m, feet, inches, or mils)

by pushing the encoder.

3.2.4. Low Pass Filter

Adjust the Low Pass Filter frequency by turning the rotary encoder. You can switch the low pass filter off by

turning the rotary encoder up (clockwise) until the frequency passes 20kHz.

Press the rotary encoder to change the filter type. Select the type by turning the rotary encoder. You can

choose from: Butterworth 6dB, Bessel 6dB, Butterworth 12dB, Bessel 12dB, Linkwitz Riley12dB, Butterworth

18dB, Bessel 18dB, Butterworth 24dB and Bessel 24dB. Higher order filters may be set by adding filter

sections in the PEQ blocks (see below).

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ALLDSP SMA-6P2408

3.2.5. High Pass Filter

Adjust the high pass frequency by dialing the rotary encoder. You can switch the high pass filter off by dialing

the rotary encoder down (counterclockwise) until the frequency passes 20Hz.

Press the rotary encoder to change the filter type. Select the type by turning the rotary encoder. You can

choose from: Butterworth 6dB, Bessel 6dB, Butterworth 12dB, Bessel 12dB, Linkwitz Riley12dB, Butterworth

18dB, Bessel 18dB, Butterworth 24dB and Bessel 24dB. Higher order filters may be set by adding filter

sections in the PEQ blocks (see below).

3.2.6. Parametric Equalizer (PEQ)

There are 10 bands of parametric equalization. Each band can be adjusted freely over the frequency range of

20Hz to 20kHz. Adjust the frequency by dialing the rotary encoder.

Press the rotary encoder to select the parameters. The available parameters are: Frequency (20Hz to

20kHz), Gain (-12dB to +12dB), Q (0.2 to 25), Enabled (On or Off), Type (Bell, High Shelf, Low Shelf, Notch,

All Pass, Band Pass, High Pass, Low Pass). For the Shelving filters, the Q value sets the steepness of the

filter in dB/Oct.

3.2.7. Compressor

The compressor is a true RMS compressor. Turn the rotary encoder to set the threshold. Press the rotary

encoder to select the parameters. The available parameters are: Threshold, Attack, Hold, Release, Ratio,

and Makeup Gain.

3.2.8. Limiter

The limiter is a zero-attack peak limiter. Only the threshold and release can be set. Press the rotary encoder

to select the parameters. The release value is displayed in dB per second.

3.2.9. Channel Link

By linking 2 channels, the settings are guaranteed to be identical for both channels, except for mixer and

mute. Turn the encoder to set the Channel Link on or off.

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ALLDSP SMA-6P2408

3.3. System Menu

Push the Menu button to enter the system menu. Push the Menu button again to toggle through the menu

items. The available menu items are:

3.3.1. Load Preset

Turn the rotary encoder to select the preset you wish to load. Push the rotary encoder to select it, then turn it

again to select "YES" and confirm again by pushing the rotary encoder knob. The preset is loaded and all

settings are applied immediately. All settings that were in the unit prior to loading the preset will be erased.

This action can not be undone.

The presets contain all filter, dynamics, gain settings etc; in other words, everything that makes out a

loudspeaker configuration. Presets do NOT contain the name of the unit, network configuration, automatic

standby delay, user access rights and passwords.

3.3.2. Save Preset

Turn the rotary encoder to select the location of the preset. If that location is not empty, the preset in that

location will be overwritten. This action can not be undone.

The system will ask you to give a name to the preset name. Select a character in the cursor position by

turning the rotary encoder; pushing the rotary encoder confirms the character selected and moves the cursor

to the next character to edit. Pushing the exit/ESC button erases the last confirmed character. Once the

name is set up, push the menu button again. If you want to continue storing the preset, select Yes by turning

the rotary encoder and confirm by pushing it. To cancel, push the exit button. Now your preset is saved in

the selected location.

The presets contain all filter, dynamics, gain settings etc; in other words, everything that makes out a

loudspeaker configuration. Presets do NOT contain the name of the unit, network configuration, automatic

standby delay, user access rights and passwords.

3.3.3. Access Level

The SMA-6P2408 has the option of locking away the front panel controls to avoid tampering of settings by

unauthorized persons. To lock the unit, select "Locked" by turning the rotary encoder, and push it to confirm.

The system will ask you to enter a password. Select a character in the cursor position by turning the rotary

encoder; pushing the rotary encoder confirms the character selected and moves the cursor to the next

character to edit. Pushing the exit/ESC button erases the last confirmed character. Once the password is set

up, push the menu button again and the unit will be locked.

ATTENTION: Make sure to remember the password! When the unit is locked and you forgot the password, it

is not possible to unlock it without contacting your local service representative.

To unlock the unit select "Unlocked" and enter the password. The password is automatically checked after

each entered character, and the unit will exit the system menu when the password is confirmed.

The default password is "Password".

3.3.4. Version Information

By pushing the rotary encoder, the display toggles through the version information about the unit (serial

number, firmware version), as well as some parameters like IP address, subnet mask, MAC address etc.

Page 10/11

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