Hünegräben 26 · 57392 Schmallenberg · Germany ·
Tel.: +49 2972 97880 · E-mail: [email protected]
DIGITAL INPUT MODULE FOR HELIX AMPLIFIERS
Congratulations!
Dear Customer,
congratulations on your purchase of this high-qual ity HELIX product.
High-Res signal transmission:
The HDM module realizes a lossless and interference-free digital signal chain
from the signal source to the HDM module as the D/A conversion takes place
inside the HDM module.
These modules are produced by using the latest technology. We wish you
many hours of enjoyment with your new Audiotec Fischer product.
Yours,
AUDIOTEC FISCHER
General installation instructions for HELIX components
To prevent damage to the unit / module and possible injury, read this man-
ual carefully and follow all installation instructions. This product has been
checked for proper function prior to shipping and is guaranteed against man-
ufacturing defects.
Before starting your installation, disconnect the battery’s negative ter-
minal and all cables from the device to prevent damage to the unit / mod-
ule, fire and / or risk of injury.
For a proper performance and to ensure full
warranty coverage, we strongly recommend to get this product installed by an
authorized HELIX dealer.
Install the HELIX Digital Input Module only in the designated device and
its specific slot. Using the module in other devices or slots can result
in damage of the module, the amplifier, the head unit / car radio or other
connected devices!
Note:
These modules can only handle stereo input signals and no MP3- or
Dolby-coded digital audio stream!
Important:
The signal of a digital audio source normally does not contain any
information about the volume level on the outputs of the amplifier. This may
cause severe damage to your speakers. We strongly recommend to only use
volume controlled audio sources!
Technical data
Input sampling rate:
28 kHz to 96 kHz
Input format:
SPDIF
Signal converters:
D/A: BurrBrown
Additional features:
SPDIF Direct In function
Mounting information
Read in the following the steps how to install the module:
1.
First disconnect the power supply (+12 V / GND / REM) and RCA / Cinch
cables from the device.
2.
Remove the acrylic cover by loosening the eight Allen screws.
3.
Then dismantle the side panel where the power supply is located by re-
moving the two Allen screws.
4.
Insert the module into the specific slot of the device which is marked in
the following picture (the picture representatively shows the HDM slot of
the HELIX C FOUR). Make sure that the module is installed properly. The
exact position of the slot can be found in the manual of each device.
5.
Insert the Allen screw which is delivered with the HDM into the mounting
hole of the module and fix it carefully.
Caution:
Do not overtighten the screw as this may damage the module.
6.
Fix the new side panel which is delivered with the HDM module with the
Allen screws. Afterwards remount the acrylic cover.
7.
Reconnect all connections to the device.
8.
Turn on the amplifier. The digital input(s) is/are automatically detected by
the device.
SPDIF Direct In function
The SPDIF Direct In function allows to bypass the input gain stage and routes
the audio signal directly to the internal power stages. The result is a per-
fect,digital signal chain for High-Res music enjoyment.
To activate the direct signal routing of a channel pair you have to set the
SPDIF Direct In switch to “On”. Additionally the appropriate channel pair of the
amplifier must be operated in fullrange mode. Any further information about
the fullrange mode will be found in the respective instruction manual of the
amplifier.
Note:
If the switch is set to “On” position the lowlevel line inputs as well as the
level controls of the amplifier are disabled.
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 de-
scription.
Technical
specifications
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 certified for the use
in vehicles within the European Community (EC).
DIGITAL INPUT MODULE
HDM 1 / HDM 2
