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User manual version 1

AV dsp amp

As a rule of thumb, sharp dips are diffraction artefacts while sharp peaks are 
caused by the drivers themselves. Exceptions are room resonances (if the 
response is not correctly truncated) and diffractions on repetitive patterns.
The second step is designing the actual crossover filters. All the usual 
strategies work. Delaying higher frequency drivers with respect to lower-
frequency ones is a powerful alternative to using asymmetric slopes and yields 
substantially improved coherence through the crossover region.

Download

Under download the user can press  load DSP  to download its designed filters to

 

the AV dsp amp. 

Firmware update

Every module has the ability to update its firmware, when  provides a new 
firmware version. The firmware version of the module is shown in the statusbar 
of the filter design window and under About.
The firmware can be easily updated by USB, the same for master and slave module. 
Under option  download  you can find  Firmware update . When this option is

 

selected the user can select the new firmware file. This is a complete hex file 
provided by , no adapts can and may be made by the user! 
After the file is selected the update begins. 

DO NOT DISCONNECT THE MODULE AT THIS PIONT!

When the progress bar is filled the update is completed. On a CRC error the 
update is automatically restarted, after three errors the update is aborted. 
Figure 11 shows a completed firmware update. 
After restarting the module the new firmware is running.

 

Note that the new firmware does not have any filters installed, so the filters must be reloaded with the 

correct values.

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Содержание AV dsp amp

Страница 1: ...User Manual AV dsp amp...

Страница 2: ...io input 8 Audio performance data 8 Remote control 8 Product overview 9 Hardware part 9 Software installation 11 Control panel 11 Filter design 12 Graph Area 13 Filter Definition Area 14 Settings wind...

Страница 3: ...ding a digital audio board SPDIF stereo audio input Input sample rates up to 192kHz Link communication trough SPDIF link cable one cable for audio and link USB audio input Low signal to noise 104dB 3...

Страница 4: ...ystem 2 channel system with active subwoofer 2 channel system both modules in bridge mode for more power All setups are both possible with analogue and optional with the digital audio inputs SPDIF and...

Страница 5: ...R in 3 5mm max 4 5V 8a USB control input 9 Master trigger output slave trigger input Right channel trough 11 230 volt input Digital version only 2 SPDIF audio input 3 SPDIF audio output Audio trough f...

Страница 6: ...board DSP digital signal processor Figure 1 shows the block diagram of the amplifier When two modules are used the second unit slaves to the first unit master through a link cable The link cable a ste...

Страница 7: ...able doubles as a master slave link obviating the need for the mini jack cable The mini jack cable remains functional though and does not have to be removed Audio performance data MBW 20kHz unless oth...

Страница 8: ...sp amp When your master is the left channel the slave will become the right channel When you want to set the master as right channel with analogue input you will have to change the input cinches left...

Страница 9: ...t channel is linked trough so if you want the left channel to be linked trough you just switch left and right For digital sources the left and right channel are linked An example is given in the last...

Страница 10: ...io device When the installation is done the connected window will appear and the connection light will turn green You can also manually make a connection by the connect button on the bottom right of t...

Страница 11: ...to use one subwoofer but if you want to use a subwoofer on both sides you can set the subout to only use left or right input signal The last thing that can be controlled in this window is volume This...

Страница 12: ...idual filtered driver responses and the sum Colour Function Blue thin Measured woofer response Green thin Measured midrange response Red thin Measured tweeter response Blue thick Filtered woofer respo...

Страница 13: ...hannels have up to 12 biquads selected using the Biquad Section radio buttons in the middle The Subwoofer lineout has only 6 biquads sections for only simple filter settings To the right is a settings...

Страница 14: ...may also be used for measuring the drivers provided the amplifier s output impedance is as low as the DSP unit s Importing response data Select the tab for the channel you want to import and click sel...

Страница 15: ...good deal of interpretation but it is doable Important Avoid making any corrections for which no anechoic data is available If reflections are included they are guaranteed to dominate the measurement...

Страница 16: ...nd for the midband peak dip combo of most midwoofer speakers Asymmetric Shelf Pole frequency and Q Zero frequency and Q Equalising the bottom end of closed box woofers with large magnets Boost Cut Cen...

Страница 17: ...e its firmware when provides a new firmware version The firmware version of the module is shown in the statusbar of the filter design window and under About The firmware can be easily updated by USB t...

Страница 18: ...akers connected Master 1 Plug in the power connector and switch the module to ON 2 Power up the module by the control panel or remote 3 Start the pc program filter design 4 Plug in the USB cable assum...

Страница 19: ...w just leave it Auto detect Note that in auto detect the USB source is selected when the module is connected to the pc 8 Switch to the Filter design Window under view or press ctrl f 9 Fill in your bi...

Страница 20: ...oad the filters to you module under Download or press ctrl F9 8 When download is completed you can power down the module and disconnect the USB cable 9 Master and Slave are now set up as a 2 channel s...

Страница 21: ...ng system that can not detect the USB device 6 Set the system to the desired setup for this example stereo left because the left speaker holds the AV dsp amp module 7 Set the Subout control to L R bec...

Страница 22: ...r filters at any time just repeat the steps of this example Technical data Supply voltage 230Volt AC 50Hz 10 Dimensions 225mmx83mmx350mm WxHxD Weight 4 3 kg Warranty The work carries warranty out for...

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