Installation - Ecler ALMAcard Bedienungsanleitung

3. INSTALLATION

The ALMAcard can be mounted in the rear bay of an Ecler DPA-Series amplifier. The amplifier
will redirect its audio signal inputs to the ALMAcard inputs, taking internally two of its outputs to feed the
stereo amplification circuitry. The other 2 processor outputs (STACK) will be available for connection to
other amplifiers or external devices.
The ALMAcard installation procedure in a DPA amplifier is the following:
1. Unplug the amplifier.
2. Unscrew and remove amplifier's cover and back plate.
3. Remove the two jumpers from the input stage connector. Keep the jumpers and the back plate in safe
place. You'll need them to use the amplifier without the filter.
4. Insert the filter in its back panel location and plug its cable (see diagram).
5. Screw the filter and the cover.
CAUTION: Filter installation must be done by a qualified technician.
Ground Loops
Care should be taken, so that the different mechanical and electrical grounds, as well as the
chassis and ground connections arriving to the device, to be independent from each other.
Ground loops can be easily detected through a low frequency hum noise (50Hz). Depending on
the level of this noise, it can interfere on the music quality.
Audio connections
Usually, many people do not care enough about the quality of cables. Many times, because of a
bad connection or bad quality cables, there can be important problems during the music reproduction.
6