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Date: 2017-06-28 

 

 

PPA DSP amplifier user manual 

 
 

 

 

 20 

7.3.

 

PPA2200-1 to 3 / Pascal® X-PRO1 to 3 

Use  the  following  parts  for  the  speaker  output 
sockets: 

 

Cable connector housing Molex 42021-2A 
(Farnell 1393363) 

 

Cable  connector  pin  Molex  MLX  42024 
(Farnell 2396371) 

Differences  between  the  X-PRO  1…3  series 
amplifiers:  

 

X-PRO1 has one bridged channel 

 

X-PRO2 = X-PRO1 plus a single-ended channel 

 

X-PRO3 = X-PRO1 plus two single-ended channels 

Note: The following section applies only for X-PRO3. 

The X-PRO3 channel 2 and 3 are single ended amplifier designs which can return energy to the power supply. At 
low frequencies, this can cause asymmetrical power supply voltage rails resulting in premature  clipping of the 
amplifier outputs or over-voltage protection of the power supply. When channel 2 and 3 are used to amplify low 
frequency signals, e.g. with monitors, please take the following actions: 

The input for channel 2 should be inverted. Simultaneously, phase inversion must be set in the software. This will 
prevent the supply pumping between channel 2 and 3. In order to have outputs of channel 2 and channel 3 in 
phase,  the  output  of  channel  2  should  be  phase  inverted  by  interchanging  the  +  and  –  connections  for  the 
speaker (see the drawing below). Tests can be carried out to verify that over-voltage protection is not engaged 
by disconnecting the load on channel 1 and driving the tops on channel 2 and 3 only. 

7.3.1.

 

Bridging 

For  BTL  use  following  setup:  The  channel 2  signal  is  the  inverted  channel 1  signal.  Connect  the  speaker  to 
ST500 Pin 1 for hot and ST300 Pin 1 for cold.  

Remember: Bridging is only possible for X-PRO3 on channels 2 and 3! 

 

 

Figure 10 X-PRO3 Setup with Inverted Channel 2

 

Figure 9 PPA2200 / X-PRO Location of Speaker Sockets

 

Содержание PPA Series

Страница 1: ...PPA Series Datasheet and Manual HW rev 2 1 This document covers passively and actively cooled product versions Version 1 9 2017 06 28 Four Audio GmbH Co KG ...

Страница 2: ...ctions 17 7 1 PPA500 and 1000 Pascal T S PRO Module 18 7 2 PPA1600 Pascal M PRO Module 19 7 3 PPA2200 1 to 3 Pascal X PRO1 to 3 20 7 3 1 Bridging 20 8 Preset or Source Selector 21 9 Installation 22 10 CAD Drawings 23 11 PC Software 24 11 1 Driver installation 24 11 2 Application Key 25 11 3 Example Generate a Preset for a 2 1 Speaker Setup 25 11 3 1 Speaker Tab 27 11 4 Crossover Tab 29 11 5 EQ Gai...

Страница 3: ...O 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 ...

Страница 4: ...SPECIALLY THE SAFETY RECOMMENDATIONS IN THE USER MANUAL ARE ADHERED TO THE AMPLIFIER UNIT IS DESIGNED FOR THE AMPLIFICATION OF PULSED AUDIO SIGNALS AND THE AMPLIFIER UNIT SHOULD ONLY BE CONNECTED TO SPEAKERS WITH AN AVERAGE IMPEDANCE THAT IS NOT LOWER THAN THE IMPEDANCES SPECIFIED IN THE USER S MANUAL DO NOT PLACE THE PRODUCT ON AN UNSTABLE CART STAND TRIPOD BRACKET OR TABLE THE DEVICE MAY FALL CA...

Страница 5: ...AUDIO VISUAL AND ENTERTAINMENTLIGHTING CONTROL APPARATUS FOR PROFESSIONAL USE PART 2 IMMUNITY VENTILATION AND HEAT SINK THE HEATSINK IS PROVIDED TO ENSURE RELIABLE OPERATION OF THE AMPLIFIER UNIT AND TO PROTECT IT FROM OVERHEATING THE HEAT SINK MUST NOT BE BLOCKED OR COVERED THIS PRODUCT SHOULD NOT BE INSTALLED UNLESS PROPER VENTILATIONIS PROVIDED OR MANUFACTURER S INSTRUCTIONS HAVE BEEN ADHERED T...

Страница 6: ... TO MINIMUM BEFORE YOU TURN ON THE AMPLIFIER TO PREVENT SUDDEN HIGH LEVELS OF NOISE WHICH MAY CAUSE HEARING OR SPEAKER DAMAGE SPEAKON CONNECTORS WARNING SPEAKON CONNECTORS MARKED WITH THE LIGHTNING FLASHES INDICATE HIGH VOLTAGES THAT ARE POTENTIALLY LIFE THREATENING WIRING TO THESE TERMINALS REQUIRES INSTALLATION BY AN INSTRUCTED PERSON AND THE USE OF READY MADE LEADS OR CORDS CUSTOM WIRING SHOULD...

Страница 7: ...ual 7 Manufacturer s Name Address Four Audio GmbH Co KG Konrad Zuse Str 4 52134 Herzogenrath Germany Product Names PPA2200 n AC PPA1600 n AC PPA1000 n AC PPA1000 n PC PPA500 n AC PPA500 n PC with n as number 1 4 Aachen May 10 2017 Rainer Thaden ...

Страница 8: ...figurations Dante digital audio network optionally available 32 bit floating point SHARC DSP Analog digital AES and optional Dante signal input Output channels are bridgeable to double single channel power PFC power factor correction Low noise fan or passive cooling option USB and touch screen 4 1 Cooling Concept The PPA models with active cooling use low speed spinning fans In some cases Hi Fi ap...

Страница 9: ...500 150 W n a 500 W yes 2 1 system with active XOV 1000 2 2 S PRO2 1 2 yes optional 2x500 W 100 W 1000 W yes 2 way speaker with active XOV or one 1 way speaker 1000 3 3 S PRO2 S A1 1 2 yes optional 3x500 W 1000 500 W 1000 W yes 3 way speaker with active XOV 1000 4 4 S PRO2 S A2 1 2 yes optional 4x500 W 1000 2x500 W 1000 W yes 2 way speaker with BTL subwoofer 1600 2 2 M PRO2 1 2 yes optional 2x800 ...

Страница 10: ... 120 dB unweighted 118 dB Output idle noise All channels 53 µVRMS 83 3 dBu unweighted 41 µVRMS 85 5 dBu A weighted Output impedance Protection Over current DC temperature high frequency DSP section Max input level 22 9 dBu Total system gain with flat DSP preset no signal processing 14 5 dB Analog input SNR 128 dB A Output SNR 112 dB A Limiters Look ahead peak limiter thermal limiter overall power ...

Страница 11: ...ns input voltage 85 VAC 265 VAC 45 65 Hz Idle power consumption 17 W Dimensions WxH AC version 135x324 mm PC version 135x306 mm AC version 135x405 mm PC version 135x386 mm weight t b a t b a t b a t b a All data are subject to change without notice For more details about the power amp section please consult Pascal s datasheets which are available at http pascal audio com amplifier modules html ...

Страница 12: ...ad 1 THD N 1kHz 1050 700 W 230 120 V Peak output current 30 A Peak output voltage SE 70 V equals RMS value of 36 dBu Peak output voltage BTL 140 V equals RMS value of 42 dBu THD N 1kHz 1W 8 Ω 0 003 Dynamic range SE A weighted 120 dB unweighted 118 dB BTL A weighted 124 dB unweighted 122 dB Output idle noise SE 60 µVRMS 82 2 dBu unweighted 44 µVRMS 84 9 dBu A weighted BTL 75 µVRMS 80 3 dBu unweight...

Страница 13: ...d XLR input impedance 20 kΩ Digital AES in XLR Dante optional RJ45 USB USB Type B for configuration preset generation etc use Four Audio PPA software mains in Neutrik PowerCon True General Mains input voltage 85 VAC 265 VAC 45 65 Hz Idle power consumption 11 2 W 14 6 W 16 5 W Dimensions WxH AC version 135x380 mm PC version 135x331 mm AC version 135x452 mm PC version 135x411 mm weight 1 45 kg 1 45 ...

Страница 14: ...30 A Ch 1 30 A Ch 2 21 A Ch 1 30 A Ch 2 3 21 A Peak output voltage 80 V equals RMS value of 40 3 dBu RL 4 Ω 160 V RL 8 Ω 120 V Ch 1 RL 4 Ω 160 V RL 8 Ω 120 V Ch 2 80 V Ch 1 RL 4 Ω 160 V RL 8 Ω 120 V Ch 2 3 80 V THD N 1kHz 1W 8 Ω 0 003 Dynamic range all channels A weighted 120 dB unweighted 118 dB Output idle noise SE 75 µVRMS 80 3 dBu unweighted 55 µVRMS 83 dBu A weighted Ch 1 140 µVRMS 75 dBu unw...

Страница 15: ...nput impedance 20 kΩ Analog in 2 optional n a n a n a balanced XLR input impedance 20 kΩ Digital AES in XLR Dante optional RJ45 USB USB Type B for configuration preset generation etc use Four Audio PPA software mains in Neutrik PowerCon True General Mains input voltage 85 VAC 265 VAC 45 65 Hz Idle power consumption 33 W Dimensions WxH 205x440 mm 205x470 5 mm 205x510 5 mm 205x550 mm Recommended mou...

Страница 16: ...th different gains at the two A D Converter channels The DRC algorithm in the DSP decides which of the signals is to be used to achieve best signal to noise ratio The Dual Input configuration is optional It can be used e g for stereo setups where the amplifier for left and right channel is built in into one speaker e g 2 1 configuration with passive satellite speakers v Figure 2 Signal Processing ...

Страница 17: ...rth can be used Wind all speaker wires 2 times through the ferrite Place the ferrite close to the amplifier module speaker output connector as shown in Figure 3 All cables shall be kept as far away from the PCB as possible Avoid running cables across the power amplifier module and use twisted pair speaker cables Figure 4 Information and pictures in this chapter taken from S PRO2 Application manual...

Страница 18: ...ker CON702 4 CH1 OUT The amplified speaker signal of channel 1 is available on this pin The S PRO2 channel 1 and 2 are single ended amplifier designs which can pump back energy to the power supply rails At low frequencies this may cause asymmetrical power supply voltage rails resulting in premature clipping of the amplifier outputs or over voltage protection of the power supply When both channels ...

Страница 19: ...t of ST500 Ch 2 is inverted This will prevent pumping of the power supply In order to have outputs of channel 1 and channel 2 in phase the input of channel 2 should be inverted Table 2 PPA1600 M PRO2 speaker connection ST300 ST500 Connector Pin Description ST300 1 CH1 OUT The amplified speaker signal of channel 1 is available on this pin ST300 2 CH1 GND This pin is used for the GND signal of the c...

Страница 20: ... When channel 2 and 3 are used to amplify low frequency signals e g with monitors please take the following actions The input for channel 2 should be inverted Simultaneously phase inversion must be set in the software This will prevent the supply pumping between channel 2 and 3 In order to have outputs of channel 2 and channel 3 in phase the output of channel 2 should be phase inverted by intercha...

Страница 21: ...l of the channel 2 speaker ST500 1 CH3 OUT The amplified speaker signal of channel 3 is available on this pin ST500 2 CH3 GND This pin is used for the GND signal of the channel 3 speaker 8 Preset or Source Selector If you intend to implement a preset or an input source selector use ST8 MicroMatch Connect a Gray coded encoder with max 15 positions Four Audio is able to provide encoders and PCBs Fig...

Страница 22: ...PPA DSP amplifier user manual 22 Note Make sure to pull unused pins to DGND Pin 6 9 Installation In future versions of this manual we will supply some guidelines for the proper assembly of the PPA into your loudspeaker ...

Страница 23: ...Date 2017 06 28 PPA DSP amplifier user manual 23 10 CAD Drawings t b d ...

Страница 24: ...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 c...

Страница 25: ...ency driver The PPA must provide the crossover for the subwoofer The PPA software consists of two main windows 1 PPA Manager Figure 12 2 On starting up the software the PPA Manager is visible Devices connected to the computer appear in a list and basic settings as e g input or preset selection can be carried out directly Via the Menu or Settings button you can e g upload presets The manager is vis...

Страница 26: ... 2 analog 1 2 both signals summed up There is no gain compensation of 6 dB Applies for 2Ch PPA configuration analog DRC If your device is configured as DRC choose this option for analog in AES for digital AES input Choose between Channel 1 2 or the sum of both Dante for digital input using the optional Dante interface Device Settings This means that the input is used which has been chosen for the ...

Страница 27: ...ossovers with speaker compensation For each output click on new and load the spk files Load the subwoofer file to Output 1 which is the internally bridged channel of the X PRO3 module and the satellite file to outputs 2 and 3 Enter the correct microphone distance used when measuring the speakers Figure 14 Speakers tab New to import speaker measurement data for each PPA output channel enter the mea...

Страница 28: ...Date 2017 06 28 PPA DSP amplifier user manual 28 ...

Страница 29: ...e target SPL of 100 dB and the latency of 10ms are ok for this example In the curves section select the measurements for Output one and two For this example we are using a crossover frequency of 400 Hz Next the crossover parameters for LF MF crossover between output channel 1 and the satellite channels 2 and 3 Figure 18 are set Figure 16 Measurement Curves ...

Страница 30: ...e curves section This displays the output frequency and phase responses of the amplifier outputs The orange curve represents output 1 the green one is output 2 These responses are calculated from the speaker measurement and the applied FIR crossover filters and optional EQs IIR filters and gains that is you see the frequency response of an imaginary measurement of speaker and DSP amp on axis The l...

Страница 31: ...tation of the crossover for each input filter latency Crossover parameters for each output Low Cut High Cut smoothing and FIR filter taps choose XOV type Figure 19 Speaker Measurement and FIR Filter for one Satellite dashed FIR filter magnitude dotted speaker measurement solid result of both ...

Страница 32: ... You can add Master EQs belonging to the system setup or add Room EQs which the end user will be able to change with the end user control application Figure 20 EQ and gain tab EQ for personal preferences or system characteristics compensate the room impulse response end user accessible gain mute and delay for each amplifier channel ...

Страница 33: ... is also possible to use 2 band limiters per output e g to adjust limiters for a coaxial driver or a speaker with a passive crossover 11 7 Upload Project to Device Close the PPA Developer window remember all changes are auto saved To upload your project to the PPA device click on the gear wheel and select Upload Developer Project Figure 21 Limiter tab limiter type enter Peak and RMS power of speak...

Страница 34: ...gear wheel and select Switch to Firmware Update Mode Figure 23 5 A new drive named PPA FWU 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 Don t rename the new file 8 You may disconnect the USB cable after the file transfer is completed 9 Power cycle the amp In the display the new firmware version is ...

Страница 35: ...Date 2017 06 28 PPA DSP amplifier user manual 35 ...

Страница 36: ...Date 2017 06 28 PPA DSP amplifier user manual 36 ...

Страница 37: ... 09 Major update of all technical information to HW Rev 2 1 Added complete PPA product range 1 8 StM 2017 04 27 Added BTL for X PRO3 1 0 1 StM 2016 07 06 first official version Update FW Update screenshots Measurements revised 1 0 StM 2016 06 30 Initial draft some parameters missing 0 1 StM The manufacturer reserves the right to make technical changes and modifications within the framework of lega...

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