Helix DSP 8 Channel Digital Signal Processor with High Level Inputs DSP.3S

HelixSKU: DSP.3

Sale price£479.99



Refining our standards

The HELIX DSP.3S is our new definition of the standard for digital signal processors. Continuously refined, this 8-channel DSP presents numerous improvements in detail. Besides the obligatory optical digital input, an additional coaxial digital input now provides the best conditions for connecting high-resolution signal sources with a sampling frequency of up to 192 kHz.

Most advanced technology for ultimate High-Res sound experience

The 64 Bit audio DSP of the latest Sigma350 generation and a throughout, native high resolution signal processing with 96 kHz sampling rate as well as A/D and D/A signal converters from BurrBrown provide outstanding sound quality. This makes the DSP.3S perfectly prepared for processing High-Res audio signals with a bandwidth of more than 40 kHz.

ACO – Advanced 32 Bit CoProcessor platform

Of course, the DSP.3 is also equipped with our proprietary 32 Bit ACO platform. This not only takes over all control tasks ultra-fast, but also the lightning-fast switching between up to ten possible sound setups. But ACO offers much more – fantastic sound effects such as Augmented Bass Processing or StageXpander are implemented as well as a channel-separated Input EQ including Input Signal Analyzer (ISA) for easy analysis and compensation of input signals of OE radios, which already include a sound setup by default.

Practice-oriented features for maximum connectivity

The sophisticated features of the DSP.3S offer everything for easy connection to factory radios or multi-channel factory sound systems. In addition to the smart highlevel input with ADEP.3 circuit, an optical and now also a coaxial digital input, an Auto Remote switch as well as a HEC slot for system expansions such as Bluetooth® HD audio streaming etc. are also part of the basic equipment.

But that’s not all – The new Smart Control Port (SCP) was implemented during the DSP.3S review process. This allows the multifunctional connection of accessory products and now even takes over their complete power supply. The solid design with snap-in function guarantees a stable connection while helping to prevent plug and cable damage and thus facilitates compact, space-saving installation concepts.

Focus on the essentials

HELIX-typical, clean and very compact design – therefore, the DSP.3S offers ideal conditions for quick and easy integration.

DSP PC-Tool – fine tuning for highest demands

There is no doubt – the HELIX DSP.3S is easily configurable via our professional and yet very user-friendly DSP PC-Tool software. The numerous adjustment options leave nothing to be desired and thus guarantees extremely precise sound adaption even with complex system configurations.


  • Extremely powerful 64 Bit “fixed point” Audio DSP with 1.2 billion MAC operations per second
  • High Resolution audio bandwidth up to more than 40 kHz for unrivalled sound quality
  • A/D and D/A signal converters from BurrBrown
  • Advanced CoProcessor (ACO) for extended feature set
  • Input Signal Analyzer (ISA) and InputEQ
  • DSP Sound Effects (SFX) such as the “Augmented Bass Processing” which dynamically optimizes the bass response of the subwoofer, the “StageXpander” that significantly widens the stereo perspective, the “RealCenter” function, which allows a perfectly focussed sound staging for both driver and co-driver and much more
  • 10 internal memory locations for sound setups
  • Smart highlevel input with ADEP.3 circuit and Auto Turn-On function
  • Optical (max. 96 kHz) and coaxial (max. 192 kHz) digital input in SPDIF format
  • Compact, future-proof Smart Control Port (SCP)
  • HEC slot for system add-ons like Bluetooth® HD Audio Streaming, High Resolution Audio Streaming via USB etc.
  • Freely definable signal routing with separate matrices for line, SPDIF and HEC/AUX
  • Optimal signal path and power supply for further improved sound quality
  • “Ground lift” switch to avoid ground loops
  • Compact dimensions for easy integration into the vehicle
  • Easiest configuration via the intuitive DSP PC-Tool V4 software

96 kHz sampling rate

The HELIX DSP.3S allows to handle all signals with the doubled sampling rate of 96 kHz. Thus the audio bandwidth is no longer limited to usual values like 22 kHz but allows an extended frequency response to more than 40 kHz. Doubling the sampling rate requires significantly higher DSP power as the number of possible arithmetic operations is halved. Only the implementation of the latest DSP chip generation allows raising the sampling rate to 96 kHz and adding new features at the same time.

ACO – Advanced 32 Bit CoProcessor

The HELIX DSP.3S 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 signal processor will be hooked up – but not with the DSP.3S.

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 DSP.3S 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 amplifiers that are connected to the HELIX DSP.3S 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 HELIX DSP.3S 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.

Automatic Digital Signal Detection

The HELIX DSP.3S allows signal-controlled switching between the analog and the digital inputs. As soon as an input signal is detected on the Optical or Coaxial Input, the signal processor automatically switches to the appropriate input. This feature can be deactivated in the DSP PC-Tool software.

Alternatively you can use an optional remote control for manual switching between analog and digital inputs.

Technical Data

Inputs: 6 x RCA / Cinch, 6 x Highlevel speaker input, 1 x Optical SPDIF (12 - 96 kHz), 1 x Coax SPDIF (12 - 192 kHz), 1 x Remote In

Input sensitivity: RCA / Cinch 2 - 4 Volts

Highlevel: 5 - 11 Volts

Outputs: 8 x RCA / Cinch, 1 x Remote Out

Output voltage: 6 Volts

Frequency response: 10 Hz - 44,000 Hz

DSP resolution: 64 Bit

DSP power: 295 MHz (1.2 billion MAC operations/second)

Sampling rate: 96 kHz

DSP type: Audio signal processor

Signal converters: A/D: BurrBrown, D/A: BurrBrown

Signal-to-noise ratio digital input: 112 dB (A-weighted)

Signal-to-noise ratio analog input: 107 dB (A-weighted)

Total harmonic distortion (THD+N) digital input: < 0.0008 %

Total harmonic distortion (THD+N) analog input: < 0.002 %

IM distortion (IMD) digital input: < 0.003 %

IM distortion (IMD) analog input: < 0.005 %

Crosstalk: > 90 dB

Operating voltage: 9.6 - 17 Volts (max. 5 sec. down to 6 Volts)

Power rating: DC 12 V ⎓ 3 A max.

Current draw: < 450 mA

Max. remote output current: 500 mA

Additional features: HEC slot, Ground lift switch, Smart Control Port, 32 Bit CoProcessor, ADEP.3 circuit, Auto Remote switch

Dimensions (H x W x D): 40 x 177 x 120 mm / 1.58 x 6.97 x 4.72”

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