thomann Quadro 500 DSP User Manual

Quadro 500 DSP

power amplifier

user manual

Musikhaus Thomann
Thomann GmbH
Hans-Thomann-Straße 1
96138 Burgebrach
Germany
Telephone: [phone]
E-mail: [e-mail]
Internet: www.thomann.de

11.07.2018, ID: 438086

Table of contents

1 General notes............................................................................................................................................... 4

1.1 Further information........................................................................................................................... 5

1.2 Notational conventions.................................................................................................................... 6

1.3 Symbols and signal words............................................................................................................... 6

2 Safety instructions..................................................................................................................................... 8

3 Features....................................................................................................................................................... 13

4 Installation.................................................................................................................................................. 14

5 Connections and controls................................................................................................................... 16

6 Operating.................................................................................................................................................... 20

7 Technical specifications....................................................................................................................... 24

8 Plug and connection assignment.................................................................................................... 26

9 Cleaning....................................................................................................................................................... 29

10 Protecting the environment.............................................................................................................. 30

Table of contents

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1 General notes

This manual contains important instructions for the safe operation of the unit. Read and follow
the safety instructions and all other instructions. Keep the manual for future reference. Make
sure that it is available to all those using the device. If you sell the unit please make sure that
the buyer also receives this manual.

Our products are subject to a process of continuous development. Thus, they are subject to
change.

General notes

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1.1 Further information

On our website (www.thomann.de) you will find lots of further information and details on the
following points:

Download This manual is also available as PDF file for you to download.

Keyword search

Use the search function in the electronic version to find the topics of
interest for you quickly.

Online guides

Our online guides provide detailed information on technical basics
and terms.

Personal consultation For personal consultation please contact our technical hotline.

Service

If you have any problems with the device the customer service will
gladly assist you.

General notes

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1.2 Notational conventions

This manual uses the following notational conventions:

The letterings for connectors and controls are marked by square brackets and italics.
Examples: [VOLUME] control, [Mono] button.

Texts and values displayed on the device are marked by quotation marks and italics.

Examples: ‘24ch’ , ‘OFF’.

1.3 Symbols and signal words

In this section you will find an overview of the meaning of symbols and signal words that are
used in this manual.

Letterings

Displays

General notes

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Signal word Meaning
DANGER! This combination of symbol and signal word indicates an

immediate dangerous situation that will result in death or
serious injury if it is not avoided.

CAUTION! This combination of symbol and signal word indicates a pos-

sible dangerous situation that can result in minor injury if it
is not avoided.

NOTICE! This combination of symbol and signal word indicates a pos-

sible dangerous situation that can result in material and
environmental damage if it is not avoided.

Warning signs Type of danger

Warning – high-voltage.

Warning – danger zone.

General notes

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2 Safety instructions

This device amplifies electric audio frequency signals to operate passive speakers. Use the
device only as described in this user manual. Any other use or use under other operating con­ditions is considered to be improper and may result in personal injury or property damage. No
liability will be assumed for damages resulting from improper use.

This device may be used only by persons with sufficient physical, sensorial, and intellectual
abilities and having corresponding knowledge and experience. Other persons may use this
device only if they are supervised or instructed by a person who is responsible for their safety.

DANGER!
Danger for children

Ensure that plastic bags, packaging, etc. are disposed of properly and are not
within reach of babies and young children. Choking hazard!

Ensure that children do not detach any small parts (e.g. knobs or the like) from
the unit. They could swallow the pieces and choke!

Never let children unattended use electrical devices.

Intended use

Safety

Safety instructions

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DANGER!
Electric shock caused by high voltages inside

Within the device there are areas where high voltages may be present. Never
remove any covers.

There are no user-serviceable parts inside.
Do not use the device if covers, protectors or optical components are missing or

damaged.

DANGER!
Electric shock caused by short-circuit

Always use proper ready-made insulated mains cabling (power cord) with a pro­tective contact plug. Do not modify the mains cable or the plug. Failure to do so
could result in electric shock/death or fire. If in doubt, seek advice from a regis­tered electrician.

Safety instructions

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CAUTION!
Possible hearing damage

The device can produce volume levels that may cause temporary or permanent
hearing impairment. Over an extended period of time, even levels that seem to
be uncritical can cause hearing damage.

Decrease the volume level immediately if you experience ringing in your ears or
hearing impairment. If this is not possible, keep a greater distance or use suffi­cient ear protectors.

NOTICE!
Risk of fire

Do not block areas of ventilation. Do not install the device near any direct heat
source. Keep the device away from naked flames.

Safety instructions

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NOTICE!
Operating conditions

This device has been designed for indoor use only. To prevent damage, never
expose the device to any liquid or moisture. Avoid direct sunlight, heavy dirt, and
strong vibrations.

NOTICE!
Power supply

Before connecting the device, ensure that the input voltage (AC outlet) matches
the voltage rating of the device and that the AC outlet is protected by a residual
current circuit breaker. Failure to do so could result in damage to the device and
possibly injure the user.

Unplug the device before electrical storms occur and when it is unused for long
periods of time to reduce the risk of electric shock or fire.

Safety instructions

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NOTICE!
Magnetic fields

The device generates strong magnetic fields that can interfere with the function
of poorly shielded devices. The strongest magnetic fields are directly above and
below the power amplifier. Therefore, never place sensitive devices such as pre­amplifiers, radio transmission systems, or tape decks directly above or below the
power amplifier. When installing the power amplifier into a rack, you should place
it in the lowest position, and further equipment such as pre-amplifiers in the
highest position.

NOTICE!
Possible staining

The plasticiser contained in the rubber feet of this product may possibly react
with the coating of your parquet, linoleum, laminate or PVC floor and after some
time cause permanent dark stains.

In case of doubt, do not put the rubber feet directly on the floor, but use felt-pad
floor protectors or a carpet.

Safety instructions

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3 Features

n 4-channel Class D power amplifier with built-in digital signal processor (DSP)
n

Connections for four signal inputs, designed as XLR sockets

n

Four lockable output sockets (Speaker Twist)

n

Extensive adjustment options allow individual adaptation to different rooms and signal
sources

n

USB port for connection to a PC

n

19" rack-mountable (1 RU)

Features

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4 Installation

NOTICE!
Possible staining

The plasticiser contained in the rubber feet of this product may possibly react
with the coating of your parquet, linoleum, laminate or PVC floor and after some
time cause permanent dark stains.

In case of doubt, do not put the rubber feet directly on the floor, but use felt-pad
floor protectors or a carpet.

Unpack and carefully check that there is no transportation damage before using the unit. Keep
the equipment packaging. To fully protect the device against vibration, dust and moisture
during transportation or storage use the original packaging or your own packaging material
suitable for transport or storage, respectively.

Create all connections while the device is off. Use the shortest possible high-quality cables for
all connections. Take care when running the cables to prevent tripping hazards.

Installation

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The unit has been designed for rack mounting in a standard 19-inch rack; it occupies one rack
unit.

Rack mounting

Installation

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5 Connections and controls

1 [POWER]

Main switch. Turns the device on and off

2 Display

Front panel

Connections and controls

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3 [Functions Control]

Rotary control to open menus, set values, and confirm selections

4 Vents
5 [Data]

USB port to connect a computer

Connections and controls

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6 [INPUT CH A] … [INPUT CH D]

Connections for four signal inputs, designed as XLR sockets

7 [OUTPUT CH A] … [OUTPUT CH D]

Speaker outputs, designed as lockable panel sockets (Speaker Twist)

Rear panel

Connections and controls

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8 [Breaker]

Resettable fuse

9 IEC chassis plug for the power supply.

Connections and controls

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6 Operating

When the main menu is closed, the display symbolically shows the level of the four input chan­nels.

To adjust the volume of the inputs, proceed as follows:

1. Use the [Functions Control] to select one of the channels ‘CH1’ …‘CH4’ and press the

control.

2. Adjust the level in a range of –70 dB…+10 dB or mute the input (‘MUTE’ ).

3. Press the control.

Level meter and setting

Operating

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In the main menu, important settings are directly accessible.

1. Use the [Functions Control] to select ‘MENU’ and press the control.

ð

The main menu opens up.

2. Use the [Functions Control] for selection, setting values, and navigation in the menu.

Pressing the control opens a menu item or confirms a setting.
The table below shows on overview of the available menus.

3. In each submenu, select ‘EXIT’ to close the submenu.

4. In the main menu, select ‘EXIT’ to close the main menu.

Menu item Meaning

‘ROUTING’ Opens the settings for assigning input channels to outputs.
‘MUTE’ Opens the settings for muting input channels.
‘DELAY’ Opens the settings for the channel-wise adjustable delay time.

Main menu

Operating

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Menu item Meaning

‘INVERT’ Opens the settings for the channel-wise adjustable phase inversion.
‘EQSETTING’ Opens the settings for the channel-wise switchable 8-band equalizer, the low-pass filter and the

high-pass filter.
For each of the eight bands, the frequency (‘FREQ’ ), the Q-shape (‘Q’), and the level boost / cut

(‘Gain’ ) can be set. Using the Bypass option (‘BP’), the equalizer for the respective frequency can
also be switched off completely.

For each channel, the option ‘LP’ can be used to turn on a low-pass filter whose filter type and
cut-off frequency can be adjusted. Using the Bypass option (‘BPSS’ ), the low-pass filter for the
respective input can also be switched off completely.

For each channel, the option ‘HP’ can be used to turn on a high-pass filter whose filter type and
cut-off frequency can be adjusted. Using the Bypass option (‘BPSS’ ), the high-pass filter for the
respective input can also be switched off completely.

The option ‘ALLBYPASS’ makes it possible to completely switch off the entire tone control for the
respective input channel.

Operating

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Menu item Meaning

‘COMP’ Opens the settings for the channel-wise switchable compressor: Threshold (‘THRES’ ), attack time

(‘ATTACK’ ), release time (‘RELEASE’).
The option ‘BYPASS’ makes it possible to completely switch off the compressor for the respective

input channel.

‘PRESET’ Allows to load and save presets and resetting to factory defaults.
‘NOISEGATE’ Opens the settings for the channel-wise switchable noise gate.
‘SYSTEM’ Opens the menu for important basic settings.

n ‘WORKMODE’ : Selecting the interconnection of the channels (bridged or parallel). In ‘Linked’

mode, the settings of channels B, C and D are automatically linked to those of channel A.

n

‘PIN’ : PIN selection and key lock activation.

n

‘TEMP’ : Setting the temperature used for the conversion of delay time into distance.

n

‘NAME’ : Naming the device with a string. When the main menu is closed, this string is shown

in the display.

n

‘FIRMWARE’ : Display of the firmware version used in the device.

Operating

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7 Technical specifications

Load impedance 8 Ω 4 Ω
Rated output power 4 × 250 W 4 × 500 W
Max. output power ‘bridged’ 1000 W
Total harmonic distortion (THD) < 0.15 %
Crosstalk below rated power > 50 dB
Frequency range 20 Hz … 20 kHz (0 /– 1 dB)
Input impedance 20 kΩ (balanced)

10 kΩ (unbalanced)
Input sensitivity (limiter off) 0.9 V…1.1 V (0 /– 1 dBv)
Damping factor (1 kHz, 8 Ω) > 180
Voltage amplification 34 dB ±0.5 dB

Technical specifications

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Signal-to-noise ratio (@ rated power, A­weighted)

95 dB (A-weighted)

Operating supply voltage

230 V 50 Hz
Power consumption 1100 W
Dimensions (W × H × D) 483 mm × 44 mm × 460 mm
Weight 8.0 kg

Block diagram

Technical specifications

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8 Plug and connection assignment

This chapter will help you select the right cables and plugs to connect your valuable equip­ment in such a way that a perfect sound experience is ensured.

Please note these advices, because especially in ‘Sound & Light’ caution is indicated: Even if a
plug fits into the socket, an incorrect connection may result in a destroyed power amp, a short
circuit or ‘just’ in poor transmission quality!

Unbalanced transmission is mainly used in semi-professional environment and in hifi use.
Instrument cables with two conductors (one core plus shielding) are typical representatives of
the unbalanced transmission. One conductor is ground and shielding while the signal is trans­mitted through the core.

Unbalanced transmission is susceptible to electromagnetic interference, especially at low
levels, such as microphone signals and when using long cables.

In a professional environment, therefore, the balanced transmission is preferred, because this
enables an undisturbed transmission of signals over long distances. In addition to the conduc­tors ‘Ground’ and ‘Signal’, in a balanced transmission a second core is added. This also transfers
the signal, but phase-shifted by 180°.

Introduction

Balanced and unbalanced trans­mission

Plug and connection assignment

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Since the interference affects both cores equally, by subtracting the phase-shifted signals, the
interfering signal is completely neutralized. The result is a pure signal without any noise inter­ference.

1 Ground, shielding
2 Signal (in phase, +)
3 Signal (out of phase, –)
4 Shielding on plug housing (option)

XLR plug (balanced)

Plug and connection assignment

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1, + Signal 1 (in phase)
1, – Signal 1 (out of phase)
2, + Signal 2 (in phase)
2, – Signal 2 (out of phase)

Speaker Twist chassis connector

Plug and connection assignment

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9 Cleaning

The fan grids of the device must be cleaned on a regular basis to remove dust and dirt. Before
cleaning, switch off the device and disconnect AC-powered devices from the mains. Use a lint­free damp cloth for cleaning. Never use solvents or alcohol for cleaning.

Fan grids

Cleaning

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10 Protecting the environment

For the transport and protective packaging, environmentally friendly materials have been
chosen that can be supplied to normal recycling.

Ensure that plastic bags, packaging, etc. are properly disposed of.
Do not just dispose of these materials with your normal household waste, but make sure that

they are collected for recycling. Please follow the notes and markings on the packaging.

This product is subject to the European Waste Electrical and Electronic Equipment Directive
(WEEE) in its currently valid version. Do not dispose with your normal household waste.

Dispose of this device through an approved waste disposal firm or through your local waste
facility. When discarding the device, comply with the rules and regulations that apply in your
country. If in doubt, consult your local waste disposal facility.

Disposal of the packaging mate­rial

Disposal of your old device

Protecting the environment

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Musikhaus Thomann · Hans-Thomann-Straße 1 · 96138 Burgebrach · Germany · www.thomann.de