Helix DSP Mini MK2 Compact 6 Channel Digital Signal Processor 64 Bit Audio DSP

The Helix DSP Mini MK2 is a compact 6-channel digital signal processor from Helix's DSP range, featuring a 64 Bit audio DSP running at 295 MHz, 96 kHz sampling, and a high-resolution bandwidth beyond 40 kHz. Designed for car audio installs requiring precise tuning and clean integration with factory or aftermarket head units.

Key specifications

• Inputs: 4 x RCA, 4 x high-level speaker input, 1 x optical SPDIF (12 to 96 kHz), remote in
• Outputs: 6 x RCA, remote out
• DSP: 64 Bit, 295 MHz (1.2 billion MAC operations per second)
• Sampling rate: 96 kHz
• Frequency response: 10 Hz to 44,000 Hz
• Signal-to-noise ratio: 106 dB digital, 103 dB analogue (A-weighted)
• Operating voltage: 9.6 to 18 V (max. 5 sec. down to 6 V)
• Dimensions (H x W x D): 40 x 177 x 104 mm

Digital 6 channel signal processor with 96 kHz / 24 Bit signal path

Despite its compact dimensions, the DSP Mini MK2 is packed with advanced technology. A 64 Bit audio DSP at 295 MHz, combined with 96 kHz sampling and a high-resolution audio bandwidth beyond 40 kHz, delivers outstanding sound quality. Unique DSP sound features include "Augmented Bass Processing", "StageXpander" and "RealCenter" — giving you precise control over your audio system. If you need more outputs or channels, Helix also offers the Helix DSP.3S 8 Channel Digital Signal Processor.

Features

• Extremely powerful "fixed point" audio DSP with 64 Bit resolution and 1.2 billion MAC operations per second
• High-resolution audio bandwidth beyond 40 kHz
• ACO – Advanced 32 Bit CoProcessor for all control and communication tasks
• 10 internal memory locations for sound setups
• Setup switching within milliseconds
• High-speed data transfer and improved usability
• HELIX Extension Card slot (HEC) for system add-ons
• Smart high-level input with ADEP.3 circuit and Auto Turn-On function
• Start-Stop capability down to 6 V supply voltage
• "Augmented Bass Processing" dynamically optimises subwoofer bass response
• "StageXpander" significantly widens the stereo perspective
• "RealCenter" delivers focused sound staging for both driver and co-driver
• Freely definable signal routing with separate matrices for line, SPDIF and HEC/AUX
• Optimal signal path and power supply for improved sound quality
• "Ground lift" switch to avoid ground loops
• Very compact dimensions for easy vehicle integration
• Configured via the intuitive DSP PC-Tool V4 software

96 kHz sampling rate

The DSP Mini MK2 processes all signals at 96 kHz, extending the audio bandwidth well beyond the usual 22 kHz limit to more than 40 kHz. Doubling the sampling rate demands significantly greater DSP processing power, as the number of available arithmetic operations is halved. Only the latest generation of DSP chip makes this possible while still adding new features.

Smart high-level input ADEP.3

Modern factory head units use sophisticated speaker-line diagnostics. Many will trigger fault messages or lose features such as fader control when a signal processor is connected — but not with the DSP Mini MK2.

The ADEP.3 circuit (Advanced Diagnostics Error Protection, 3rd Generation) prevents these issues without placing unnecessary load on the OE radio's speaker outputs at high volumes.

Start-Stop capability

The DSP Mini MK2's switched-mode power supply maintains a stable internal voltage even when the battery drops to 6 V during engine crank.

Power Save Mode

Power Save Mode is active by default. If no input signal is detected for more than 60 seconds, it switches off the remote output and any connected amplifiers — reducing standby power consumption.

Note: in vehicles using CAN bus or similar systems, the head unit may remain active for up to 45 minutes after the car is locked. Power Save Mode will handle this automatically, and the remote output reactivates within one second once a music signal is detected. The 60-second turn-off delay and Power Save Mode itself can both be adjusted or disabled via DSP PC-Tool software.

Automatic digital signal detection

The DSP Mini MK2 automatically switches from analogue to digital input when a signal is detected on the optical input. This behaviour can be disabled in DSP PC-Tool software, or an optional remote control can be used for manual input switching.