DCN28
How do I install the driver for the USB-interface?
The USB-interface is actually an onboard USB to COM Port (RS-232) adaptor and the circuit is made by FTDIchip.com.
The driver for this device can be downloaded here FTDI driver (Windows OS) or at the manufactures web page
- also drivers for Mac. If you place the driver file on the desktop, it’s easy to find and to point out to the installation wizard.
How do I know which COM-port number is assigned to the attached digital crossover?
If you get an error message you might have chosen a wrong COM Port number. Then you simply press the button
Refresh Ports. Now you should be able to see which COM Port number the attached DCN28 has been assigned and be able to program the DCN28 from the XOverWizard II software.
You can also see this in the Device Manager of your Windows OS under Ports (COM & LPT) as a USB Serial Port (COM number).
Windows will automatically assign a free COM Port and Windows on this specific PC will always use this number for this specific DCN filter unless you change it.
You can open the Device Manager by right click on the desktop icon and the choose Properties/Hardware tab/Device Manager or Control Panel/Administrative Tools/Computer Management
In rare occasions your PC / laptop could have had many USB device attached and therefore the Windows OS have assigned many virtual COM ports to different devices
– in such rare occasion the number assigned to the current DCN28 might have gone over COM9, which for some reason will not work. In this event you have to reassign
a COM port number low than 10 manually. This is done in the device manager described above.
Connecting an unbalanced analogue source to the DCN28 XLR input...
If you got a single-ended RCA / chinch output of your analogue source you to buy an adaptor or buy / make an adaptor cable with RCA connector in one end of a microphone cable (2 conductors + shield) and a XLR connector at the other. Connect like this: RCA inner connector - conductor (often red) – XLR pin 2 (hot), RCA shield – resistor (100R) or short – conductor (often white) – XLR pin 3 (cold), RCA shield – wire shield – XLR pin 1 (neutral).
RCA to XLR cable
Connecting a power amplifier with RCA to DCN28 balanced XLR output...
If a connected power amplifier only has RCA input (singled ended) you will have to use an adapter or better yet an adapter cable.
IMPORTANT NOTE: make sure that the inverted output (pin3) is NOT shorted to GND (pin1). You might damage the output buffer in DCN28.
DIY cable connect like this: XLR pin 2 (hot) - conductor (often red) – RCA inner connector, XLR pin 3 (cold) NOT connected, XLR pin 1
(neutral) – wire shield – RCA shield.
How do I attenuate the individual output channels of DCN28?
There is two ways of attenuating the individual channels in the DCN28 either via the software or via the encoder button on the DCN28 front panel maximum -15dB.
If you know there is a big difference between driver sensitivity AND gain of used power amplifier channels it is advisable to attenuate the drivers
via the front panel menu, which in turn makes the attenuation in analogue domain. If there isn't much difference between driver sensitivities it's
okay to simply do it via the XOverWizard software setup - the attenuation is now done in the digital domain.
Theoretically it is better to do the individual channel attenuation in the analogue domain AFTER the DAC, so there is no bit reduction in the
digital domain. If the difference is minor the advantage is also minor.
How do I set the start volume of DCN28?
You can alter the start up volume via the encoder button on the DCN28 front panel.
It's done in the last menu option labeled "StartVol"
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