HiFonics ZXS550/2

The HiFonics ZXS550/2 from the ZEUS STREET series combines the proven performance of the legendary ZEUS amplifiers with modern Class D digital technology and exceptionally compact dimensions. Thanks to its high efficiency, the power amplifier delivers powerful audio performance while taking up relatively little space and generating less heat.

With up to 2 x 275 watts RMS at 2 ohms or 550 watts RMS in bridge mode at 4 ohms, the ZXS550/2 is suitable for both high-power speaker systems and for driving a subwoofer.

The high-quality housing, featuring aluminum logo elements, precisely milled model names, and cast aluminum end caps, highlights the distinctive ZEUS design. Carefully selected, audiophile-tuned components ensure high-quality signal processing.

For integration into modern vehicles, the amplifier features high-level inputs with EPS (Error Protection System), an automatic power-on function, and start-stop compatibility. The low-interference IFT (Interference Free Technology) reduces electromagnetic interference and ensures uninterrupted radio reception.

The adjustable high-pass and low-pass filters allow the power amplifier to be flexibly adapted to different speaker configurations. A compact bass-level remote control makes it easy to adjust the bass level from the driver's seat.

Technical Specifications

General Characteristics

• Manufacturer: HiFonics

• Model: ZXS550/2

• Series: ZEUS STREET ZXS

• Amplifier Type: 2-Channel Digital Amplifier

• Amplifier Class: Class D

• Number of channels: 2

• Bridge operation: Yes

• Operating voltage: 12 V vehicle electrical system

• Speaker impedance: 2–8 ohms in stereo mode

• Efficiency: approx. 90%
  
  

RMS Output Power at 14.4 V

• 2 x 150 watts RMS at 4 ohms

• 2 x 275 watts RMS at 2 ohms

• 1 x 550 watts RMS bridged at 4 ohms
  
  

Audio Characteristics

• Frequency response (-3 dB): 4–39,000 Hz

• Signal-to-noise ratio: 107 dB

• Damping factor: greater than 300

• Total harmonic distortion at 1 watt RMS: less than 0.02%

• Total harmonic distortion at 5 watts RMS: less than 0.005%

• Input sensitivity: 0.2–5 V
  
  

Crossover Networks and Filters

• Crossover modes: Full / HP / LP

• High-pass filter (HPF): 50–500 Hz

• Low-pass filter (LPF): 50–500 Hz

• Adjustable filter: Yes

• Full-range operation: Yes
  
  

Connections and Features

• RCA inputs: Yes, via a connection cable harness

• High-level inputs: Yes

• EPS (Error Protection System): Yes

• Automatic power-on function: Yes

• Power-on via DC voltage detection: Yes

• Activation via audio signal detection (VOX): Yes

• Start-stop capability: Yes

• IFT (Interference-Free Technology): Yes

• EMC-certified digital technology: Yes

• Bass Level Remote Control: Yes

• External fuse: 1 x 50 A
  
  

Dimensions

• Width: 112 mm

• Height: 44 mm

• Length: 194 mm
  
  

What's Included

• 1 HiFonics ZXS550/2 2-channel amplifier

• 1 x Bass Level Remote Control

• 1 x wiring harness for the signal inputs

• 1 x User Manual