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16chDSPAMP HELIX DSP ULTRA XT

A 16-channel high-end DSP with 32-bit/96kHz processing, inheriting the design philosophy of BABY BRAX.

【HELIX DSP ULTRA XT | A 16-Channel High-End DSP Built Around the BABY BRAX Concept】

For those who want to refine every detail of their system after upgrading speakers or adding a subwoofer, this HELIX high-end DSP amplifier puts the same level of care into the heart of the system itself.

The HELIX DSP ULTRA XT is a 16-channel high-end DSP developed under the "BABY BRAX" concept, drawing on the design philosophy of HELIX's flagship BRAX line. Internal processing runs at 96kHz/32-bit, and a dedicated ACO (Advanced Co-Processor) handles signal processing separately, keeping headroom available even with complex channel routing and detailed EQ settings.

Resolution Backed by High-Precision Converters

The ADC section uses three ESS 32-bit ES9841Q HyperStream ADCs, while the DAC section uses two ES9081Q HyperStream DACs. With a digital-input S/N ratio of 128dB and total harmonic distortion of 0.0003% or less, the design is built to capture fine nuances in the source material and reproduce a natural sound with minimal coloration.

USB Playback and Expandability

A USB Perfect Stream-compatible USB-C port supports high-quality playback from USB drives and computers. The unit also includes one Extension Card 2.0 slot, leaving room for future functional expansion.

For Those Who Want to Plan Installation and Tuning Together

With a DSP amplifier in this class, sound quality is not determined by the unit's performance alone. The wiring and settings required will vary depending on your vehicle's factory audio configuration and the speakers or subwoofer it is paired with. When considering this unit, please consult with us so we can plan the installation and tuning together.

RCA input

8ch (ch7/8 can also be used as AUX input when Extension Card 2.0 is not installed)

High-level input

16ch (cannot be used simultaneously with the same RCA input channel)

Digital input

1x optical digital (TOSLINK square), 1x coaxial digital, 1x USB-C (S/PDIF: 32-192kHz)

Input sensitivity

RCA input: 1-4V / 2-8V, High-level input: 4-16V / 8-32V

Output terminals

16ch RCA analog output

RCA output voltage

8V RMS

Frequency response

10Hz-44kHz

DSP

High-performance 64-bit/295MHz processor

DSP sampling rate

96kHz/32-bit

A/D & D/A converter

High-quality 32-bit, made by ESS Technology

S/N ratio

128dB (digital input), 116dB (analog input)

Distortion (THD)

0.0003% or less

Input impedance

RCA: 25kΩ, High-level: 9-33Ω (equipped with ADEP.3 function)

Operating voltage

9.6-18V (supports a momentary voltage drop to as low as 6V for up to 5 seconds)

Dimensions (W x H x D)

255 x 55 x 170mm

Accessories

USB C-to-C cable, USB-A/C conversion adapter

List price¥ 550,000 (Tax included)