• 20 DSP channels for maximum flexibility with multi-channel sound upgrades
• 18-channel amplifier with Pure Class GD concept, which combines exceptional sound quality with high performance
• High power 18-channel highlevel input with up to 32 V RMS input sensitivity and ADEP.3 circuit
• 1:1 IOR (Input-to-Output Routing) – same number of highlevel inputs and amplifier outputs
• Up to 160 W RMS output power per channel into 2 Ω
• TwinDSP Power – two extremely powerful “fixed point” Audio DSPs with 64 Bit
• VCP (Virtual Channel Processing) allows even more flexible configuration for highly complex sound systems
• ACO – Advanced 32 Bit CoProcessor platform for system and DSP features like:
• ISA (Input Signal Analyzer) and InputEQ for easy analysis and compensation of input signals
• SFX sound effects – Augmented Bass Processing, StageXpander, RealCenter & Co.
• Compact, future-proof SCP (Smart Control Port) for connecting remote controls and accessories
• HEC slot for system add-ons like Bluetooth® HD Audio Streaming, High Resolution Audio Streaming via USB etc.
• Optical digital input in SPDIF format and two processed signal outputs
• Start-Stop capable power supply with extended input voltage range up to 18 V – ideal for modern EV vehicles
• Automatic Remote switch
• Compact design with low heat dissipation thanks to extraordinary efficiency

Special features:

Pure Class GD amplifier technology

Audiotec Fischers proprietary Pure Class GD concept 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 allowing smallest heat sinks and most compact form factors. 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.

TwinDSP Power

The V EIGHTEEN DSP contains two of the most powerful 64 Bit audio signal processors from Analog Devices with the outstanding overall calculating power of 2.4 billion MAC operations per second. The TwinDSP Power concept makes the 20 separately processed channels and the numerous new sound features possible.

ACO – Advanced 32 Bit CoProcessor

The HELIX V EIGHTEEN DSP amplifier incorporates an extraordinary powerful 32 Bit CoProcessor of the latest generation for all monitoring and communication tasks, both internally and externally. In opposite 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 CoProcessor. It allows software upgrades of all components of the DSP in order to adjust the microcontroller-controlled ADEP.3 circuit for example at future modifications / changes in 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 sophisticated possibilities of diagnosing the connected speakers. In particular the latest generation of car radios are equipped with additional monitoring functions so that failure messages and loss of specific features (e.g. fader function) quite often appear if a common amplifier will be hooked up – but not with the V EIGHTEEN DSP.
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.

Power Save Mode

The Power Save Mode is incorporated in the basic setup. It allows to significantly reduce the power consumption of the amplifiers that are connected to the HELIX V EIGHTEEN DSP 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 output and therefore the connected amplifiers will be turned off.
The V EIGHTEEN DSP 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 EIGHTEEN DSP assures a constant internal supply voltage even if the battery’s voltage drops to 6 Volts during engine crank.

Note: “The Bluetooth® word mark and logos are registered trademarks owned by Bluetooth SIG, Inc. and any use of such marks by Audiotec Fischer GmbH is under license. Other trademarks and trade names are those of their respective owners.”