The HELIX DSP ULTRA S is a 12-channel digital signal processor engineered for advanced car audio tuning and integration. It uses dual 64-bit Analog Devices DSPs and AKM 32-bit A/D and D/A converters to minimize distortion and extend audio bandwidth, and is produced in Germany.

The unit provides eight analog inputs, eight highlevel inputs, optical and coaxial SPDIF, and twelve RCA outputs, plus HEC and SCP expansion options. The ACO 32-bit coprocessor accelerates control tasks and feature processing, while the DSP PC-Tool software enables detailed configuration, time alignment and tuning for OEM and aftermarket systems.