Owner's Manual
Hünegräben 26 · 57392 Schmallenberg · Germany · Tel.: +49 2972 97880 · E-mail: contact@audiotec-scher.com
6.  Make sure that the module is installed properly and all pins are 
fully inserted into the socket:
7. If the bottom plate was bolted, x the new side panel which is
delivered with the Extension Card. Afterwards reinsert the bottom 
plateandxit,too.Otherwisereinsertthebottomplateatrstand
thenxthenewsidepanelwiththescrews.
8.  Reconnect the power supply and ground cable to the device. 
9. Connect the amplier / DSP to your computer. If you have to
bridge longer distances please use an active USB extension 
cable with integrated repeater or the optionally available WIFI 
 CONTROL  interface. 
10. First turn on the device and then start the latest software or at 
least software version 4.61a. The Extension Card is automatically 
detected.
11. IMPORTANT: After you have made the rough adjustment of the 
input sensitivity and input load (see point 3), the input sensitivity 
has to be ne adjusted in the DCM menu of the DSP PC-Tool
software. To do so follow the subsequent steps:
  1. Open the “Extended Features” tab of the DCM menu.
 2.Select the congured Input Sensitivity Switch Position 
 position of your module.
  3.  Adjust the input sensitivity to match the output voltage of the 
connected signal source.
12. Reconnect all remaining cables to the device. 
  Make sure that the polarity is correct. If one or more connections 
havereversedpolarityitmayaecttheperformanceofthedevice.
  Important: It is strictly forbidden to use the modules highlevel 
and lowlevel line input of an individual channel at the same time 
as this may cause severe damage to your head unit / car radio. 
Nevertheless it is possible to use the highlevel input of one chan-
nel and the lowlevel line input of another channel simultaneously.
  Attention: Solely use the connection cable with the 4-pole con-
nector and open leads, which is included in delivery, to connect a 
signal source to the highlevel inputs of the module!
  For the connection of the 3.5 mm stereo line input we recommend 
to use a shielded 3.5 mm jack cable to avoid any background 
noises.
Signal routing of the Extension Card
NowtheinputscanbefreelyconguredasadditionalMAINInputsor
as an AUX source. To do so route the “AUX L” and “AUX R” signals 
whether in the “Main Routing” tab or in the “AUX / HEC Routing” tab. 
The “Used Input” window indicates automatically which input is con-
nected and in case of the highlevel input it also indicates the position 
oftheLoadJumper.Theusedinputhasinuenceoftheadjustable
rangeofthe“InputGain”conguration.
Warranty disclaimer
The limited warranty comply with legal regulations. Failures 
or damages caused by overload or improp er use are not 
covered by the warranty. Please return the defective product 
only with a valid proof of purchase and a detailed malfunction 
description. Technical specications are subject to change! 
Errors are reserved!
For damages on the vehicle and the device, caused 
by hand ling errors of the module, we can’t assume 
liability. These devices are certied for the use 
in vehicles within the European Community (EC).
EXTENSION CARD
HEC / MEC ANALOG IN 


