HELIX NEXT DSP ULTRA XT - 16 Channel High Resolution DSP
The HELIX NEXT DSP ULTRA XT takes the already impressive ULTRA platform even further, offering 16 channels of high-end DSP processing for complex, no-compromise car audio systems. With TwinDSP processing power, 8 RCA and 12 high-level inputs, 16 RCA outputs, ESS Technology signal converters, USB PerfectStream, Virtual Channel Processing, and extensive OEM integration capabilities, the DSP ULTRA XT is built for systems that demand maximum processing flexibility and sound quality.
$2,800.00 $3,200.00
A New Dimension of Sound
Advanced Technology, Expanded Capability
The HELIX NEXT DSP ULTRA XT takes high-end digital signal processing to the next level with expanded channel capability, advanced signal conversion, extensive OEM integration, and a new generation of connectivity. With 16 processed output channels, eight additional virtual channels, TwinDSP processing power, USB PerfectStream, and flexible analog and digital inputs, the DSP ULTRA XT is designed to serve as the processing center of sophisticated, fully active car audio systems.
Despite its extensive capabilities, the DSP ULTRA XT remains a compact standalone processor, providing the flexibility required for complex system designs without integrated amplification.
Audio Performance Par Excellence
At the heart of the DSP ULTRA XT are high-performance ESS Technology signal converters. Analog-to-digital conversion is handled by the ESS ES9841Q with HyperStream IV architecture and SABRE technology, while the ESS ES9081Q with HyperStream IV architecture and SABRE HIFI technology handles digital-to-analog conversion.
The result is exceptional measured performance, including a signal-to-noise ratio of up to 128 dB through the digital input, THD+N as low as 0.0003%, and a frequency response extending from 10 Hz to 44,000 Hz. Its 16 RCA outputs provide up to 8 Volts RMS, giving downstream amplifiers a strong, clean signal.
TwinDSP Power
Complex system processing requires serious computing power. The DSP ULTRA XT utilizes two 295 MHz audio signal processors operating at 64-bit DSP resolution, providing a combined 2.4 billion MAC operations per second.
This processing architecture supports eight additional processed virtual channels and 16 processed output channels while maintaining a 96 kHz internal sampling rate.
The additional output capability makes the DSP ULTRA XT especially well suited for large fully active systems requiring extensive crossover, equalization, time alignment, signal routing, and system integration.
ACO – Advanced 32 Bit CoProcessor Platform
The DSP ULTRA XT features HELIX's new-generation ACO platform with a dedicated 32 Bit CoProcessor handling control and communication functions independently from the primary audio processing.
The processor provides 10 internal memory locations for sound setups, allowing multiple configurations to be stored directly on the device. Compatible HELIX remote controls can be used to switch between stored setups and control additional DSP functions
The ACO platform also enables USB PerfectStream, Advanced Input Signal Analyzer functionality, Power Save Mode, and other system-level features.
USB PerfectStream – High-Resolution Audio & Measurement Over USB
The DSP ULTRA XT introduces USB PerfectStream, a lossless, bidirectional USB audio interface integrated directly into the new-generation ACO platform.
Through a single USB-C connection, the DSP can simultaneously support high-resolution audio streaming, AISA measurements, and DSP PC-Tool configuration. USB audio streaming supports resolutions up to 192 kHz / 32 Bit.
PerfectStream can also transmit test tones and measurement signals directly between the DSP and computer, allowing AISA measurements to be performed without additional measurement hardware.
USB PerfectStream supports Windows 10 and 11, macOS, Android, and iOS.
Virtual Channel Processing – Advanced Signal Routing
Modern OEM systems often require multiple input signals to be combined, corrected, processed, and redistributed across complex multi-way systems. HELIX Virtual Channel Processing adds an additional processing layer between the physical inputs and outputs to simplify these configurations.
The DSP ULTRA XT provides eight additional processed virtual channels alongside its 16 processed output channels.
This architecture enables cross-channel group equalization, multi-way configuration of DSP Sound Effects, and additional functions such as Rear Attenuation.
Advanced OEM Integration
The DSP ULTRA XT provides 12 high-level speaker inputs capable of accepting signals directly from factory radios, aftermarket radios, or factory-installed amplifiers.
High-level input sensitivity can be configured across a total range of 4 to 32 Volts, while its eight RCA inputs provide an adjustment range of 1 to 8 Volts. This wide operating range makes the DSP ULTRA XT suitable for integration with everything from conventional aftermarket sources to higher-powered OEM amplifiers.
HELIX's ADEP.3 circuit further supports integration with modern factory audio systems.
Connectivity at the Highest Level
The DSP ULTRA XT provides extensive analog and digital connectivity for both aftermarket and OEM systems.
Analog connectivity includes 8 RCA inputs, 12 high-level speaker inputs, and 16 RCA outputs. Digital sources can be connected through optical SPDIF, coaxial SPDIF, or USB PerfectStream. The optical SPDIF input supports 24–96 kHz signals, while the coaxial SPDIF input supports signals up to 192 kHz.
An optical SPDIF output provides an additional digital signal path for compatible downstream equipment.
The Extension Card 2.0 slot allows compatible modules to add functionality such as high-definition Bluetooth audio streaming, additional analog inputs, and other interfaces.
Finally, the Smart Control Port (SCP) provides connectivity for compatible HELIX remote controls and accessories.
Elegant, Smart and Compact
Even with 16 processed outputs, extensive analog and digital connectivity, TwinDSP processing, and the new ACO platform, the DSP ULTRA XT measures just 55 x 255.6 x 170 mm / 2.17 x 10.06 x 6.69 inches.
The result is a powerful standalone DSP designed for high-end systems where processing capability, OEM integration, connectivity, and tuning flexibility are all priorities.
TwinDSP Power
The HELIX NEXT DSP ULTRA XT utilizes two high-performance 295 MHz audio signal processors with 64-bit DSP resolution and a combined processing capability of 2.4 billion MAC operations per second.
Together with a 96 kHz sampling rate, this processing architecture provides the computational capability required for the DSP ULTRA XT's eight virtual channels, 16 processed output channels, extensive routing, equalization, and DSP functionality.
ACO – Advanced 32 Bit CoProcessor
A dedicated 32 Bit CoProcessor handles control and system-management functions independently from the primary audio DSPs.
The DSP ULTRA XT provides 10 internal sound setup memory locations. Two defined memory locations can be switched using the onboard Control button or an optional URC.3, while compatible controllers such as the DIRECTOR and CONDUCTOR can provide access to all internal memory locations.
USB PerfectStream
USB PerfectStream provides a lossless, bidirectional USB audio connection through the integrated USB-C port.
It enables:
- Lossless high-resolution audio streaming up to 192 kHz / 32 Bit
- Playback of test tones and measurement signals directly from a computer
- AISA measurement without additional measurement hardware
- DSP PC-Tool communication through the same USB-C connection
Advanced Input Signal Analyzer – AISA
When integrating high-level factory signals, the Advanced Input Signal Analyzer can be used to analyze the incoming signal for factory-applied equalization, time alignment, high-pass, low-pass, and all-pass filters.
PerfectStream allows the required measurement signals to be transferred directly through USB-C without requiring additional measurement hardware.
Virtual Channel Processing
Virtual Channel Processing adds an additional DSP layer between the physical input and output processing stages.
The DSP ULTRA XT provides 8 processed virtual channels and 16 processed output channels, allowing complex routing and processing structures to be created without tying every function directly to a physical input or output.
Smart High-Level Integration with ADEP.3
Twelve high-level inputs provide direct integration with factory radios and factory-installed amplifiers, with input sensitivity adjustable from 4 to 32 Volts.
The integrated ADEP.3 circuit provides additional support for integration with modern OEM audio systems.
Extension Card 2.0
The integrated Extension Card 2.0 slot provides a modular path for expanding the DSP ULTRA XT.
Compatible EC 2.0 modules can add interfaces for functions such as high-definition Bluetooth audio streaming, additional analog inputs, and additional functionality, depending on the installed module.
Power Save Mode
Power Save Mode reduces overall system power consumption when no music signal is detected. When activated, the DSP ULTRA XT switches off its Remote Out, which can shut down connected amplifiers.
The shutoff delay can be configured between 10 and 600 seconds, with 60 seconds set by default.
- High-end standalone 16-channel digital signal processor
- 16 processed output channels
- 8 additional processed virtual channels
- TwinDSP architecture with two 295 MHz audio signal processors
- 64 Bit DSP resolution
- 2.4 billion MAC operations per second
- 96 kHz internal sampling rate
- ESS Technology ES9841Q ADC
- ESS Technology ES9081Q DAC
- HyperStream IV architecture
- SABRE and SABRE HIFI technology
- Signal-to-noise ratio up to 128 dB through digital input
- Maximum 8 Volt RMS RCA output
- 8 RCA / Cinch inputs
- 12 high-level speaker inputs
- 16 RCA / Cinch outputs
- RCA input sensitivity from 1–8 Volts
- High-level input sensitivity from 4–32 Volts
- Optical SPDIF input
- Coaxial SPDIF input
- Optical SPDIF output
- USB-C connectivity
- USB PerfectStream
- High-resolution USB audio streaming up to 192 kHz / 32 Bit
- Advanced Input Signal Analyzer (AISA)
- Virtual Channel Processing (VCP)
- ADEP.3 circuit
- Extension Card 2.0 slot
- Smart Control Port (SCP)
- 32 Bit CoProcessor
- 10 internal sound setup memory locations
- GND Connection switch
- Auto Remote switch
- Power Save Mode
- Operating voltage from 9.6–18 Volts
- Start-Stop capability down to 6 Volts for up to 5 seconds
- DSP PC-Tool configuration
Virtual Channel Processing (VCP)
Virtual Channel Processing adds an additional processed signal layer between the physical inputs and outputs. The DSP ULTRA XT provides eight processed virtual channels and 16 processed output channels, giving installers significantly more flexibility when routing and processing complex multi-channel systems.
VCP enables cross-channel group equalization, multi-way configuration of DSP Sound Effects, and functions such as Rear Attenuation.
Advanced Input Signal Analyzer (AISA)
AISA is designed to help analyze factory input signals before processing. It can identify factory-applied equalization as well as high-pass, low-pass, and all-pass filtering, helping installers understand and compensate for the signal being supplied by an OEM system.
With USB PerfectStream, the measurement process can be performed without additional measurement hardware.
USB PerfectStream
USB PerfectStream provides lossless, bidirectional communication between the DSP ULTRA XT and a compatible computer or mobile device.
In addition to high-resolution music streaming at up to 192 kHz / 32 Bit, the connection supports direct playback of test and measurement signals, AISA measurement, and DSP configuration.
InputEQ
InputEQ provides input-side processing for correcting or compensating for the characteristics of incoming signals, particularly when integrating factory audio systems.
Together with AISA, this allows the incoming signal to be analyzed and corrected before the system's primary output tuning is performed.
DSP Sound Effects (SFX)
Virtual Channel Processing supports multi-way configuration of HELIX DSP Sound Effects, allowing compatible SFX processing to be incorporated into more complex system configurations. The manual specifically identifies multi-way DSP Sound Effect configuration as one of the core advantages of VCP.
A New Dimension of Sound
Advanced Technology, Expanded Capability
The HELIX NEXT DSP ULTRA XT takes high-end digital signal processing to the next level with expanded channel capability, advanced signal conversion, extensive OEM integration, and a new generation of connectivity. With 16 processed output channels, eight additional virtual channels, TwinDSP processing power, USB PerfectStream, and flexible analog and digital inputs, the DSP ULTRA XT is designed to serve as the processing center of sophisticated, fully active car audio systems.
Despite its extensive capabilities, the DSP ULTRA XT remains a compact standalone processor, providing the flexibility required for complex system designs without integrated amplification.
Audio Performance Par Excellence
At the heart of the DSP ULTRA XT are high-performance ESS Technology signal converters. Analog-to-digital conversion is handled by the ESS ES9841Q with HyperStream IV architecture and SABRE technology, while the ESS ES9081Q with HyperStream IV architecture and SABRE HIFI technology handles digital-to-analog conversion.
The result is exceptional measured performance, including a signal-to-noise ratio of up to 128 dB through the digital input, THD+N as low as 0.0003%, and a frequency response extending from 10 Hz to 44,000 Hz. Its 16 RCA outputs provide up to 8 Volts RMS, giving downstream amplifiers a strong, clean signal.
TwinDSP Power
Complex system processing requires serious computing power. The DSP ULTRA XT utilizes two 295 MHz audio signal processors operating at 64-bit DSP resolution, providing a combined 2.4 billion MAC operations per second.
This processing architecture supports eight additional processed virtual channels and 16 processed output channels while maintaining a 96 kHz internal sampling rate.
The additional output capability makes the DSP ULTRA XT especially well suited for large fully active systems requiring extensive crossover, equalization, time alignment, signal routing, and system integration.
ACO – Advanced 32 Bit CoProcessor Platform
The DSP ULTRA XT features HELIX's new-generation ACO platform with a dedicated 32 Bit CoProcessor handling control and communication functions independently from the primary audio processing.
The processor provides 10 internal memory locations for sound setups, allowing multiple configurations to be stored directly on the device. Compatible HELIX remote controls can be used to switch between stored setups and control additional DSP functions
The ACO platform also enables USB PerfectStream, Advanced Input Signal Analyzer functionality, Power Save Mode, and other system-level features.
USB PerfectStream – High-Resolution Audio & Measurement Over USB
The DSP ULTRA XT introduces USB PerfectStream, a lossless, bidirectional USB audio interface integrated directly into the new-generation ACO platform.
Through a single USB-C connection, the DSP can simultaneously support high-resolution audio streaming, AISA measurements, and DSP PC-Tool configuration. USB audio streaming supports resolutions up to 192 kHz / 32 Bit.
PerfectStream can also transmit test tones and measurement signals directly between the DSP and computer, allowing AISA measurements to be performed without additional measurement hardware.
USB PerfectStream supports Windows 10 and 11, macOS, Android, and iOS.
Virtual Channel Processing – Advanced Signal Routing
Modern OEM systems often require multiple input signals to be combined, corrected, processed, and redistributed across complex multi-way systems. HELIX Virtual Channel Processing adds an additional processing layer between the physical inputs and outputs to simplify these configurations.
The DSP ULTRA XT provides eight additional processed virtual channels alongside its 16 processed output channels.
This architecture enables cross-channel group equalization, multi-way configuration of DSP Sound Effects, and additional functions such as Rear Attenuation.
Advanced OEM Integration
The DSP ULTRA XT provides 12 high-level speaker inputs capable of accepting signals directly from factory radios, aftermarket radios, or factory-installed amplifiers.
High-level input sensitivity can be configured across a total range of 4 to 32 Volts, while its eight RCA inputs provide an adjustment range of 1 to 8 Volts. This wide operating range makes the DSP ULTRA XT suitable for integration with everything from conventional aftermarket sources to higher-powered OEM amplifiers.
HELIX's ADEP.3 circuit further supports integration with modern factory audio systems.
Connectivity at the Highest Level
The DSP ULTRA XT provides extensive analog and digital connectivity for both aftermarket and OEM systems.
Analog connectivity includes 8 RCA inputs, 12 high-level speaker inputs, and 16 RCA outputs. Digital sources can be connected through optical SPDIF, coaxial SPDIF, or USB PerfectStream. The optical SPDIF input supports 24–96 kHz signals, while the coaxial SPDIF input supports signals up to 192 kHz.
An optical SPDIF output provides an additional digital signal path for compatible downstream equipment.
The Extension Card 2.0 slot allows compatible modules to add functionality such as high-definition Bluetooth audio streaming, additional analog inputs, and other interfaces.
Finally, the Smart Control Port (SCP) provides connectivity for compatible HELIX remote controls and accessories.
Elegant, Smart and Compact
Even with 16 processed outputs, extensive analog and digital connectivity, TwinDSP processing, and the new ACO platform, the DSP ULTRA XT measures just 55 x 255.6 x 170 mm / 2.17 x 10.06 x 6.69 inches.
The result is a powerful standalone DSP designed for high-end systems where processing capability, OEM integration, connectivity, and tuning flexibility are all priorities.
TwinDSP Power
The HELIX NEXT DSP ULTRA XT utilizes two high-performance 295 MHz audio signal processors with 64-bit DSP resolution and a combined processing capability of 2.4 billion MAC operations per second.
Together with a 96 kHz sampling rate, this processing architecture provides the computational capability required for the DSP ULTRA XT's eight virtual channels, 16 processed output channels, extensive routing, equalization, and DSP functionality.
ACO – Advanced 32 Bit CoProcessor
A dedicated 32 Bit CoProcessor handles control and system-management functions independently from the primary audio DSPs.
The DSP ULTRA XT provides 10 internal sound setup memory locations. Two defined memory locations can be switched using the onboard Control button or an optional URC.3, while compatible controllers such as the DIRECTOR and CONDUCTOR can provide access to all internal memory locations.
USB PerfectStream
USB PerfectStream provides a lossless, bidirectional USB audio connection through the integrated USB-C port.
It enables:
- Lossless high-resolution audio streaming up to 192 kHz / 32 Bit
- Playback of test tones and measurement signals directly from a computer
- AISA measurement without additional measurement hardware
- DSP PC-Tool communication through the same USB-C connection
Advanced Input Signal Analyzer – AISA
When integrating high-level factory signals, the Advanced Input Signal Analyzer can be used to analyze the incoming signal for factory-applied equalization, time alignment, high-pass, low-pass, and all-pass filters.
PerfectStream allows the required measurement signals to be transferred directly through USB-C without requiring additional measurement hardware.
Virtual Channel Processing
Virtual Channel Processing adds an additional DSP layer between the physical input and output processing stages.
The DSP ULTRA XT provides 8 processed virtual channels and 16 processed output channels, allowing complex routing and processing structures to be created without tying every function directly to a physical input or output.
Smart High-Level Integration with ADEP.3
Twelve high-level inputs provide direct integration with factory radios and factory-installed amplifiers, with input sensitivity adjustable from 4 to 32 Volts.
The integrated ADEP.3 circuit provides additional support for integration with modern OEM audio systems.
Extension Card 2.0
The integrated Extension Card 2.0 slot provides a modular path for expanding the DSP ULTRA XT.
Compatible EC 2.0 modules can add interfaces for functions such as high-definition Bluetooth audio streaming, additional analog inputs, and additional functionality, depending on the installed module.
Power Save Mode
Power Save Mode reduces overall system power consumption when no music signal is detected. When activated, the DSP ULTRA XT switches off its Remote Out, which can shut down connected amplifiers.
The shutoff delay can be configured between 10 and 600 seconds, with 60 seconds set by default.
- High-end standalone 16-channel digital signal processor
- 16 processed output channels
- 8 additional processed virtual channels
- TwinDSP architecture with two 295 MHz audio signal processors
- 64 Bit DSP resolution
- 2.4 billion MAC operations per second
- 96 kHz internal sampling rate
- ESS Technology ES9841Q ADC
- ESS Technology ES9081Q DAC
- HyperStream IV architecture
- SABRE and SABRE HIFI technology
- Signal-to-noise ratio up to 128 dB through digital input
- Maximum 8 Volt RMS RCA output
- 8 RCA / Cinch inputs
- 12 high-level speaker inputs
- 16 RCA / Cinch outputs
- RCA input sensitivity from 1–8 Volts
- High-level input sensitivity from 4–32 Volts
- Optical SPDIF input
- Coaxial SPDIF input
- Optical SPDIF output
- USB-C connectivity
- USB PerfectStream
- High-resolution USB audio streaming up to 192 kHz / 32 Bit
- Advanced Input Signal Analyzer (AISA)
- Virtual Channel Processing (VCP)
- ADEP.3 circuit
- Extension Card 2.0 slot
- Smart Control Port (SCP)
- 32 Bit CoProcessor
- 10 internal sound setup memory locations
- GND Connection switch
- Auto Remote switch
- Power Save Mode
- Operating voltage from 9.6–18 Volts
- Start-Stop capability down to 6 Volts for up to 5 seconds
- DSP PC-Tool configuration
Virtual Channel Processing (VCP)
Virtual Channel Processing adds an additional processed signal layer between the physical inputs and outputs. The DSP ULTRA XT provides eight processed virtual channels and 16 processed output channels, giving installers significantly more flexibility when routing and processing complex multi-channel systems.
VCP enables cross-channel group equalization, multi-way configuration of DSP Sound Effects, and functions such as Rear Attenuation.
Advanced Input Signal Analyzer (AISA)
AISA is designed to help analyze factory input signals before processing. It can identify factory-applied equalization as well as high-pass, low-pass, and all-pass filtering, helping installers understand and compensate for the signal being supplied by an OEM system.
With USB PerfectStream, the measurement process can be performed without additional measurement hardware.
USB PerfectStream
USB PerfectStream provides lossless, bidirectional communication between the DSP ULTRA XT and a compatible computer or mobile device.
In addition to high-resolution music streaming at up to 192 kHz / 32 Bit, the connection supports direct playback of test and measurement signals, AISA measurement, and DSP configuration.
InputEQ
InputEQ provides input-side processing for correcting or compensating for the characteristics of incoming signals, particularly when integrating factory audio systems.
Together with AISA, this allows the incoming signal to be analyzed and corrected before the system's primary output tuning is performed.
DSP Sound Effects (SFX)
Virtual Channel Processing supports multi-way configuration of HELIX DSP Sound Effects, allowing compatible SFX processing to be incorporated into more complex system configurations. The manual specifically identifies multi-way DSP Sound Effect configuration as one of the core advantages of VCP.
FAQ
HELIX products purchased through ResoNix include a one-year warranty through us. Please contact us if you experience an issue with your product or need assistance with a warranty claim.
The best DSP depends on your vehicle, factory audio system, speaker configuration, and overall system goals. Contact the ResoNix team for a vehicle-specific recommendation before placing your order.
Yes. We offer educational resources for customers who would like to learn how to tune their own DSP. For those who prefer professional assistance, ResoNix also offers remote tuning services to help properly configure and optimize the system.
The correct connection method depends on your vehicle, head unit, and factory audio system. Contact the ResoNix technical support team for a vehicle-specific integration recommendation.
The correct version depends on whether your HELIX DSP uses an SCP (Smart Control Port) or a Control Input connection. Please refer to the official HELIX CONDUCTOR compatibility chart to identify the correct version for your processor.
The Control Input version can also be connected to newer devices with an SCP input using the optional SCP-to-Control Input adapter.
The output channels on HELIX V Series and P Series DSP amplifiers cannot be bridged. However, the output channels on the HELIX AMPLIFY 206 DSP can be configured for bridged operation.
Yes. A calibrated measurement microphone is required to complete the remote tuning process accurately. ResoNix offers a complete Measurement and DSP Tuning Kit with the equipment needed for your remote tuning session.
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