thomann the t.racks DSP 4x4 Amp 4.250 User manual

DSP 4x4 Amp 4.250, DSP 4x4 Amp100V
Controller
User Manual

Thomann GmbH
Hans-Thomann-Straße 1
96138 Burgebrach
Germany
Telephone: [phone]
Internet: www.thomann.de
13.06.2023, ID: 555931, 555941

Table of contents
1 General information................................................................................................................................. 4
1.1 Further information........................................................................................................................... 5
1.2 Notational conventions.................................................................................................................... 5
1.3 Symbols and signal words............................................................................................................... 6
2 Safety instructions..................................................................................................................................... 8
3 Features....................................................................................................................................................... 10
4 Installation and starting up................................................................................................................ 12
5 Connections and controls................................................................................................................... 13
6 Operating on a PC................................................................................................................................... 16
7 Technical specications....................................................................................................................... 32
8 Plug and pin assignments................................................................................................................... 38
9 Protecting the environment.............................................................................................................. 40
Table of contents
DSP 4x4 Amp 4.250, DSP 4x4 Amp100V 3
Controller

1 General information
This user manual contains important information on the safe operation of the device. Read and
follow all safety notes and all instructions. Save this manual for future reference. Make sure
that it is available to all persons using this device. If you sell the device to another user, be sure
that they also receive this manual.
Our products and user manuals are subject to a process of continuous development. We there‐
fore reserve the right to make changes without notice. Please refer to the latest version of the
user manual which is ready for download under www.thomann.de.
General information
4DSP 4x4 Amp 4.250, DSP 4x4 Amp100V
Controller

1.1 Further information
On our website (www.thomann.de) you will nd lots of further information and details on the
following points:
Download This manual is also available as PDF le for you to download.
Keyword search Use the search function in the electronic version to nd 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.
1.2 Notational conventions
This manual uses the following notational conventions:
General information
DSP 4x4 Amp 4.250, DSP 4x4 Amp100V 5
Controller

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’ .
The individual steps of an instruction are numbered consecutively. The result of a step is
indented and highlighted by an arrow.
Example:
1. Switch on the device.
2. Press [Auto].
ðAutomatic operation is started.
3. Switch o the device.
1.3 Symbols and signal words
In this section you will nd an overview of the meaning of symbols and signal words that are
used in this manual.
Letterings
Displays
Instructions
General information
6DSP 4x4 Amp 4.250, DSP 4x4 Amp100V
Controller

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.
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 information
DSP 4x4 Amp 4.250, DSP 4x4 Amp100V 7
Controller

2 Safety instructions
This device is intended to be used for amplication, mixing and playback of signals from
musical instruments and microphones. 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 sucient 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.
Safety
DANGER!
Risk of injury and choking hazard for children!
Children can suocate on packaging material and small parts. Children can injure themselves when handling the device. Never allow
children to play with the packaging material and the device. Always store packaging material out of the reach of babies and small
children. Always dispose of packaging material properly when it is not in use. Never allow children to use the device without supervi‐
sion. Keep small parts away from children and make sure that the device does not shed any small parts (such knobs) that children
could play with.
DANGER!
Danger to life due to electric current!
A short circuit could lead to a re hazard and risk of death. Always use proper ready-made insulated triple-core mains cable with a
safety plug. Do not modify the mains cable or the plug. In case of isolation damage, disconnect immediately the power supply and
arrange repair. If in doubt, seek advice from a qualied electrician.
Intended use
Safety instructions
8DSP 4x4 Amp 4.250, DSP 4x4 Amp100V
Controller

DANGER!
Danger to life due to electric current!
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 when covers, safety equipment or optical components are missing or damaged.
DANGER!
Risk of death from electrical current!
The output voltages of modern high-performance ampliers may result in death or serious injury. Never touch the bare ends of loud‐
speaker cables when the amplier is on.
NOTICE!
Risk of re
Do not block areas of ventilation. Do not install the device near any direct heat source. Keep the device away from naked ames.
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. Only operate the device within the ambient conditions specied in the chapter
‘Technical specications’ of this user manual. Avoid heavy temperature uctuations and do not switch the device on immediately
after it was exposed to temperature uctuations (for example after transport at low outside temperatures). Dust and dirt inside can
damage the unit. When operated in harmful ambient conditions (dust, smoke, nicotine, fog, etc.), the unit should be maintained by
qualied service personnel at regular intervals to prevent overheating and other malfunction.
Safety instructions
DSP 4x4 Amp 4.250, DSP 4x4 Amp100V 9
Controller

3 Features
n4-channel DSP installation power amplier
nFront-side power switch
n4 × 250 W into 8 ohms or 4 × 350 W into 4 ohms
nProgramming via USB
n3 front-side buttons for preset switching
n3 rear-side contact inputs via screw terminals for preset switching
nInputs: 4 × XLR (balanced)
nOutputs: 4 × Speaker Twist and 4 × 6.35 mm (1/4-inch) TRS jack (pre-out)
nFrequency response: 20 Hz…20 kHz
nClass-D power amplier
DSP 4x4 Amp 4.250
Features
10 DSP 4x4 Amp 4.250, DSP 4x4 Amp100V
Controller

n4-channel DSP installation power amplier
nFront-side power switch
n4 × 40 W into 8 ohms
nProgramming via USB
n3 front-side buttons for preset switching
n3 rear-side contact inputs via screw terminals for preset switching
nInputs: 4 × XLR (balanced)
nOutputs: 4 × screw terminals and 4 × 6.35 mm (1/4-inch) TRS jack (pre-out)
nFrequency response: 20 Hz…20 kHz
nClass-D power amplier
DSP 4x4 Amp100V
Features
DSP 4x4 Amp 4.250, DSP 4x4 Amp100V 11
Controller

4 Installation and starting up
Unpack and check carefully there is no transportation damage before using the unit. Keep the
equipment packaging. To fully protect the product 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 o. Use the shortest possible high-quality cables for
all connections. Take care when running the cables to prevent tripping hazards.
The gure schematically shows how the device can be controlled via a computer's USB port.Conguration example
Installation and starting up
12 DSP 4x4 Amp 4.250, DSP 4x4 Amp100V
Controller

5 Connections and controls
ö#$ % & '(
1[CLIP] LED for each channel | The LED lights up when the signal on the respective input is overloading.
2[SIG] LEDs for each channel | The LED lights up when a signal is present at the respective input.
3 Rotary control [CH 1]…[CH 4] | Controls the output level of the corresponding channel.
4 Buttons [U01], [U02], [U03] | Buttons for calling up the presets. Press and hold the button for 2 seconds to call them up.
5[USB] | USB interface for connecting to a PC
6[POWER] | The LED lights when the device is on.
7[POWER] button | Button for switching on and o
Front
Connections and controls
DSP 4x4 Amp 4.250, DSP 4x4 Amp100V 13
Controller

+ , -) * .
DSP 4×4 Amp 4.250
8 Connection for the power cable
9 Screw terminal strip for switching the presets. The relevant preset is called up through potential-free bridging of pins
[Gnd] and [U01]…[U03] for 2 seconds.
10 Switch to toggle the supply voltage
11 [AMP OUT] | Outputs [CH1]…[CH4], designed as Speaker Twist
12 [PRE OUT] | Outputs [1]…[4], designed as 6.35 mm (1/4-inch) jack sockets (mono, balanced)
13 [INPUT] | Inputs [CH1]…[CH4], designed as XLR (mono, balanced)
Back
Connections and controls
14 DSP 4x4 Amp 4.250, DSP 4x4 Amp100V
Controller

+ , -) *
DSP 4×4 Amp100V
8 Connection for the power cable
9[MODE] | Screw terminal strip for switching the presets. The relevant preset is called up through potential-free bridging of
pins [Gnd] and [U01]…[U03].
10 [AMP OUT] | 100 V outputs [CH 1]…[CH 4], designed as screw terminal strip
11 [PRE OUT] | Outputs [1]…[4], designed as 6.35 mm (1/4-inch) jack sockets (mono, balanced)
12 [INPUT] | Inputs [CH1]…[CH4], designed as XLR (mono, balanced)
Connections and controls
DSP 4x4 Amp 4.250, DSP 4x4 Amp100V 15
Controller

6 Operating on a PC
1. Insert the software CD into the disk drive of your Windows PC and start the installation
programme that matches the device version.
2. Follow the instructions of the installation programme to completion.
3. Connect your PC to the device via a USB cable and turn on the device.
ðThe operating system detects the newly added USB device.
4. Open the PC programme. It automatically detects the connected device.
ðIn the upper right corner of the programme window the marking ‘Online’ appears.
1. Click the ‘Online’ button in the programme window.
2. Close the programme window.
Install and start the software.
Exiting the software
Operating on a PC
16 DSP 4x4 Amp 4.250, DSP 4x4 Amp100V
Controller

All tabs of the programme window have a similar structure and are divided into the following
areas:
'
$
&
%
ö
#
1 Tab for selecting a function group
2 Main menu
3 Button for the status of the connection to the PC
Components of the programme
window
Operating on a PC
DSP 4x4 Amp 4.250, DSP 4x4 Amp100V 17
Controller

4 Display area
5 Control area
6 Buttons for quick access to important presets
Menu item Meaning
‘File’ Loading user presets and saving them on the PC
‘Link’ Assignment of input to output channels
‘Copy’ Copying parameter settings from one input or output channel to another
‘Lock’ Changing device password
‘Test Tone’ Setting the internal test tone generator: pink noise, white noise, sine wave 20 Hz…20 kHz
‘Language’ Selecting the language for the user interface of the programme (English or German)
‘About’ Information about the programme version
Main menu
Operating on a PC
18 DSP 4x4 Amp 4.250, DSP 4x4 Amp100V
Controller

Area Meaning
‘Address’ Display of the marking of the device
‘Preset’ Display of the current user's preset
‘Store’ Saving a user preset
‘Recall’ Recalling a user preset
Buttons for quick access to
important presets
Operating on a PC
DSP 4x4 Amp 4.250, DSP 4x4 Amp100V 19
Controller

“Gain” tab
Operating on a PC
20 DSP 4x4 Amp 4.250, DSP 4x4 Amp100V
Controller