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Pure Class GD amplifier technology
Audiotec Fischers proprietary Pure Class GD con-
cept takes the efficiency of conventional Class D
amps to the next level. By varying the internal
supply voltage depending on the amplifier’s input
signals, idle losses are significantly reduced and
overall efficiency is close to maximum at any time.
So heat dissipation is almost negligible thus allow-
ing smallest heat sinks and most compact form fac-
tors. Besides that Pure Class GD amp outperforms
conventional Class D designs in terms of sound
quality by implementing a fully differential signal
path and improved output filter design.
ACO – Advanced 32 Bit CoProcessor
The HELIX V TWELVE DSP MK2 incorporates an
extraordinary powerful 32 Bit CoProcessor of the
latest generation for all monitoring and communi-
cation tasks, both internally and externally. In oppo-
site to the 8 Bit predecessor generation this MCU
achieves way higher speeds with respect to setup
switching and data communication with our DSP
PC-Tool software. A further significant advantage is
the integrated, native boot loader of the CoProces-
sor. It allows software upgrades of all components
of the integrated DSP in order to adjust the micro-
controller-controlled ADEP.3 circuit for example to
future requirements of the diagnostic system of
factory radios or if the device will be extended with
additional interfaces. In addition, thanks to the new
flash memory, the ACO offers 10 memory locations
for sound setups instead of the common two.
Smart highlevel input ADEP.3
Modern, factory-installed car radios incorporate so-
phisticated possibilities of diagnosing the connect-
ed speakers. In particular the latest generation of
car radios are equipped with additional monitoring
functions so that failure messages and loss of spe-
cific features (e.g. fader function) quite often appear
if an amplifier will be hooked up – but not with the
V TWELVE DSP MK2.
The new ADEP.3 circuit (Advanced Diagnostics
Error Protection, 3rd Generation), which can be
adapted to the diagnostic mode of the radio, avoids
all these problems without loading the speaker out-
puts of the OE radio during high volumes unneces-
sarily (see page 44, item “ADEP.3 Configuration”).
Power Save Mode
The Power Save Mode is incorporated in the ba-
sic setup. It allows to significantly reduce the power
consumption of the amplifiers that are connected
to the HELIX V TWELVE DSP MK2 once there’s
no input signal present for more than 60 seconds.
Please note that in many up-to-date cars with “CAN”
or any other internal bus structures it may happen
that the radio remains “invisibly” turned on for up to
45 min. even after locking and leaving the car! Once
the “Power Save Mode“ is active the remote out
-
put and therefore the connected amplifiers will be
turned off. The V TWELVE DSP MK2 will reactivate
the remote output within a second if a music signal
is applied. It is possible to either modify the turn-off
time of 60 sec. or completely deactivate the “Power
Save Mode” via the DSP PC-Tool software.
Start-Stop capability
The switched power supply of the HELIX
V TWELVE DSP MK2 assures a constant internal
supply voltage even if the battery’s voltage drops to
6 Volts during engine crank.
Unique Features of the HELIX V TWELVE DSP MK2
