26
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.
Smart highlevel input
The latest generation of OE car radios incorpo-
rates sophisticated possibilities of diagnosing the
connected speakers. If a common amplifier will be
hooked up failure messages and loss of specific
features (e.g. fader function) quite often appears -
but not with the V EIGHT DSP.
The new ADEP circuit (Advanced Diagnostics Error
Protection) avoids all these problems without load
-
ing the speaker outputs of the OE radio during high
volumes unnecessarily.
Start-Stop capability
The switched power supply of the HELIX
V EIGHT DSP 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 basic
setup. It allows to significantly reduce the power
consumption of the V EIGHT DSP and connected
amplifiers 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 “in
-
visibly” turned on for up to 45 min. even after leaving
the car! Once the “Power Save Mode“ is active the
remote output (
Rem Out
) and the internal amplifier
stages will be turned off. The HELIX V EIGHT DSP
will reactivate the remote output and the internal
amplifier stages 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.
Automatic Digital Signal Detection
Switching from analog input to the digital input is
done automatically as soon as a signal is detect-
ed on the
Optical Input
. This feature can be deac-
tivated in the DSP PC-Tool software. Alternatively
you can use an optional remote control for manual
switching between analog and digital inputs.
Unique Features of the HELIX V EIGHT DSP
