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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 EIGHT 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 EIGHT DSP MK2.
The new ADEP.3 circuit (Advanced Diagnostics
Error Protection, 3rd Generation) avoids all these
problems without loading the speaker outputs of the
OE radio during high volumes unnecessarily.
Start-Stop capability
The switched power supply of the HELIX
V EIGHT DSP MK2 assures a constant internal
supply voltage even if the battery’s voltage drops to
6 Volts during engine crank.
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 EIGHT DSP MK2 once there’s no in
-
put 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 output and
therefore the connected amplifiers will be turned off.
The V EIGHT 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.
Unique Features of the HELIX V EIGHT DSP MK2
