Four Audio PR4x1000-2-DSP User manual

PR4x1000-2-DSP
PR3x1000-2-DSP
PR2x1000-2-DSP
PR1x1000-2-DSP
User Manual
Version 1.0
2016-06-02
© Four Audio GmbH & Co. KG 2016

Content
1. Important Safety Information............................................................................................................................................3
2. EC Declaration of Conformity ............................................................................................................................................4
3. Package contents ...............................................................................................................................................................5
4. Product Specifications........................................................................................................................................................5
5. Technical data.....................................................................................................................................................................6
5.1. Block diagram ............................................................................................................................................................7
6. PC software.........................................................................................................................................................................8
6.1. Driver installation ......................................................................................................................................................8
6.2. Firmware Update ......................................................................................................................................................9
7. Contact................................................................................................................................................................................9
8. Document revision history.................................................................................................................................................9

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1. Important Safety Information
This device complies with the CE and VDE directives and fulfills the requirements of class 1 (DIN EN60065: 2006).
It has been manufactured and tested with your safety in mind. However, improper use can result in potential
electric shock or fire hazards.
To avoid defeating the safeguards that have been built into the device, please observe the precautions discussed
in this document.
The lightning flash with arrowhead symbol, within a triangle, is intended to alert you to the presence of
uninsulated “dangerous” voltages within your device’s enclosure that may be of sufficient magnitude to
constitute a risk of electric shock to persons.
The exclamation point within a triangle is intended to alert you to the presence of important instructions in the
literature accompanying the device.
Warnings
TO REDUCE THE RISK OF ELECTRIC SHOCK, DO NOT REMOVE THE COVER OF THE DEVICE.
THERE ARE DANGEROUS VOLTAGES INSIDE THE UNIT EVEN WHEN MAINS IS DISCONNECTED.
THERE ARE NO USER-SERVICEABLE PARTS INSIDE IT.
TO REDUCE THE RISK OF FIRE OR ELECTRIC SHOCK, DO NOT EXPOSE THIS DEVICE TO RAIN OR
MOISTURE.
DO NOT PERFORM ANY SERVICING UNLESS YOU ARE QUALIFIED TO DO SO BY FOUR AUDIO.
REFER ALL SERVICING TO QUALIFIED SERVICE PERSONNEL.
SERVICING THE DEVICE YOURSELF WILL INVALIDATE THE WARRANTY.
THIS IS A PROTECTIVE CLASS 1 DEVICE AND MUST THEREFORE BE EARTHED! NEVER DISCONNECT THE
PROTECTIVE EARTH CONDUCTOR.
Ventilation
Slots and openings in the casing of the device are provided for ventilation, to ensure reliable operation of the
device and to protect it from overheating.
MAKE SURE THAT ALL VENTILATION SLOTS ARE CLEAN AND FREE OF DUST.
NEVER BLOCK THE VENTILATION OPENINGS BY PLACING THE DEVICE ON A BED, SOFA, RUG OR OTHER SIMILAR
SURFACE.
NEVER COVER THE VENTILATION OPENINGS WITH ITEMS SUCH AS NEWSPAPERS, CLOTHS ETC.
DO NOT PLACE THE DEVICE IN A BUILT-IN INSTALLATION SUCH AS A BOOKCASE OR RACK UNLESS PROPER
VENTILATION IS PROVIDED OR YOU HAVE ADHERED TO THE MANUFACTURER’S INSTRUCTIONS.
Water and moisture
The appliance is built for indoor use.
DO NOT EXPLOIT IT TO HUMIDITY OR EXTREME TEMPERATURES
ENSURE THAT NO OBJECTS FILLED WITH LIQUIDS, SUCH AS VASES, ARE PLACED ON THE DEVICE.

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Disposal
When the end-of-life of your device is reached, do not dispose this device in the household waste.
This protects our environment and saves raw materials. Return it to your distributor who will dispose
it free of charge for you.
Four Audio assumes no liability for improper use of the product (e.g. operating errors, incorrect line voltage)
KEEP THIS INFORMATION FOR FUTURE REFERENCE
2. EC Declaration of Conformity
An example of this equipment has been tested and found to comply with the following European and
international Standards for Electromagnetic Compatibility and Electrical Safety:
Radiated Emission (EU): EN55103-1 (1996)
RF Immunity (EU): EN55103-2 (1996)
Electrical Safety (EU): EN60065 (1993)
Manufacturer's Name & Address
Four Audio GmbH & Co. KG
Konrad-Zuse-Str. 4
52134 Herzogenrath
Germany
Product Name
PR4x1000-2-DSP
Aachen, March -10-2016
Rainer Thaden

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3. Package contents
1x PR series DSP amplifier
1x Neutrik ® powerCON True1 cord
4. Product Specifications
The PR series amplifier is an 1…4 input channel to 2…8 output channel DSP controlled class D power amplifier. It
is mainly intended for fixed sound installations and suitable even in surroundings where low operational noise is
relevant. Due to its cooling concept with large heatsink and ultra-low noise fans the amplifier remains quiet even
under full load conditions.
The input channel configuration is represented by the product name PR__x1000-2-DSP. Unless otherwise
mentioned all content of this manual is valid for all versions of the amplifier.
Main features:
500 W per output channel
Analog, digital AES and optional Dante signal inputs
One input is split into two outputs for active crossover usage
Available as 1…4 input version (equals 2, 4, 6, 8 power amplifiers)
Ultra low noise operation (suitable for cinema applications)
PFC (power factor correction)
Versions:
PR1x1000-2-DSP
PR2x1000-2-DSP
PR3x1000-2-DSP
PR4x1000-2-DSP
Analog input
channels (XLR)
1
2
3
4
Digital AES input
channels (XLR)
1x Stereo
2x Stereo
3x Stereo
4x Stereo
Digital Input
channels with
Dante option (RJ45)
2
4
6
8
Output Channels
2
4
6
8
Output power per
channel
500 W
500 W
500 W
500 W

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5. Technical data
Single power amp channel
Please keep in mind that one amplifier input is split into two power amp channels.
Single output power @ 1% THD+N, 1kHz, RL= 8Ω
245 W
Single output power @ 1% THD+N, 1kHz, RL= 4Ω
490 W
Single output power @ 1% THD+N, 1kHz, RL= 2.7Ω
120 V: 600 W
230 V:725 W
Total power amp system efficiency (2 x 250W @ 8Ω)
89 %
Peak output current
30 A
Peak output voltage (unloaded)
70 V
THD+N (1kHz @ 1W)
0,003 %
Dynamic range
120 dB(A)
Idle noise
40 µV(A)
Output impedance(1kHz)
14 mΩ
Protection
Over current, DC, over/under voltage, temperature,
high frequency
DSP
Max. input voltage
23 dBu
Analog input SNR
128 dB(A)
Output SNR
114 dB(A)
Limiters
Look ahead peak limiter, thermal limiter, overall
power supply limiter
EQ
Bell filter, allpass, shelving filter 6 dB and 12 dB
Crossovers
Bessel, Butterworth, Linkwitz-Riley, Critical
Other DSP features
input delay, output delay, phase invert, gain
FIR
Linear phase X-over and linear phase loudspeaker
equalization
Connectors
Analog Input
Balanced XLR
Digital Input
AES / EBU (XLR)
optional Dante® digital audio interface
Programming interface
USB

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General
PR1x1000-2-DSP
PR2x1000-2-DSP
PR3x1000-2-DSP
PR4x1000-2-DSP
Mains input voltage
85VAC –265VAC, 45-65 Hz
Idle power consumption
17,5 W
35 W
52,5 W
70 W
operation noise level (1 m,
20 Hz-20 kHz)
13 dB(A)
16 dB(A)
17,8 dB(A)
19 dB(A)
Dimensions
19”, 2 RU, 435 mm depth
Weight
7,4 kg
9,9 kg
12,4 kg
14,90 kg
All data are subject to change without notice
5.1. Block diagram

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Fig. 1 unknown device
6. PC software
Please contact Four Audio for the PC software and the firmware files. Contact information is provided at the end
of this manual.
6.1. Driver installation
When you first plug a USB cable into the amplifier, you’ll need to install the USB
driver. This needs to be done only once and not for every amplifier channel.
1. Download the drivers and unzip the package.
2. Open the Windows Device Manager and navigate to a device named VCOM,
located in Other Devices (Fig. 1).
3. Right-click the VCOM device and choose Update Driver Software (Fig. 2).
4. Click Browse my computer for driver software
5. Navigate to the directory with the unzipped driver files and click OK.
6. A warning will appear (Fig. 3) stating that the driver is not signed by
Microsoft. The driver will be signed soon. In the meantime, you can safely
choose the second option and install the software anyway.
Fig. 3 Windows security dialogue
Fig. 2 driver update

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6.2. Firmware Update
To update the PR4x1000-2-DSP’s firmware follow these steps:
1. Open the Four Audio PPA software.
2. Connect to the desired amplifier via USB and turn on the amplifier.
3. Choose the Serial Port in the drop down list (Fig. 4). Only serial ports connected to PR amplifiers will be
shown.
4. After the connection is established the Firmware Update button will appear (Fig. 5). Click on this button.
5. A new drive named CRP DISABLE (or PPA-FWU in more recent versions) will appear in the Windows
Explorer
6. This drive contains one file called “firmware.bin”. Delete this file.
7. Copy the new firmware file to the drive. You don’t need to rename the file.
8. You may disconnect the USB cable after the file transfer is completed.
9. Repeat step 2…8 for all amplifier channels
10. Power-cycle the amp. In all displays the new firmware version is shown at the header of the display.
7. Contact
Four Audio GmbH & Co. KG
Konrad-Zuse-Str. 4
52134 Herzogenrath, Germany
[phone]
[email protected]
8. Document revision history
Date
item
Version
author
2016-06-02
1.0
StM
The manufacturer reserves the right to make technical changes and modifications within the framework of legal
norms as well as improving the performance characteristics of the product at any time.
Fig. 4 Serial port selection
Fig. 5 firmware update
button