Musway NX175.4

The Musway NX175.4 is a powerful and exceptionally compact 4-channel Class-D amplifier from the NX series. With an output power of up to 4 × 175 watts RMS at 2 ohms, it offers impressive power reserves in a very compact design and is ideal for high-quality car audio systems.

Thanks to its compact design—measuring just 89 mm wide and 41 mm high—the amplifier can be easily integrated even in tight spaces. Modern Class D technology ensures high efficiency, low heat generation, and precise, dynamic music reproduction.

Features include adjustable high-pass and low-pass filters for both channel pairs, offering a wide adjustment range from 50 to 5,000 Hz. This makes the NX175.4 suitable for both traditional front and rear speakers as well as semi-active speaker systems.

The built-in high-level inputs with Musway EPS® allow for connection to many factory-installed car stereos. An automatic power-on function further simplifies integration into existing vehicle systems.

Visually, the amplifier stands out thanks to its high-quality enclosure featuring an illuminated Musway logo behind a real glass panel.

In a review published in the trade magazine *Car & Hifi*, Issue 3/2026, the NX175.4 was awarded the “BEST PRODUCT” distinction and received a Sound Quality recommendation. The measured performance figures even exceeded the manufacturer’s specifications.

Technical Specifications

General Characteristics

• Amplifier Type: 4-Channel Micro Amplifier

• Amplifier Class: Class D

• Series: Musway NX

• Number of channels: 4

• 2-ohm stable in stereo mode

• Bridgeable operation: 2 × 350 watts RMS at 4 ohms

• Efficiency: up to 86%

• Total Harmonic Distortion (THD): 0.009% at 5 watts

• Start-stop capable

• EPS® Error Protection System

• Low-interference technology, EMC-certified

• Illuminated Musway logo with a real glass cover
  
  

RMS Output Power

• 4 × 100 watts RMS at 4 ohms

• 4 × 175 watts RMS at 2 ohms

• 2 × 350 watts RMS bridged at 4 ohms
  
  

Crossover Networks and Filters

• High-pass filter (HPF), Channel 1/2: 50–5,000 Hz

• Low-pass filter (LPF), Channel 1/2: 50–5,000 Hz

• High-pass filter (HPF), channels 3/4: 50–5,000 Hz

• Low-pass filter (LPF), channels 3/4: 50–5,000 Hz

• Input Channel Switching: CH2/CH4
  
  

Connections and Features

• RCA inputs via connection cables

• High-Level Inputs with EPS®

• Automatic Power-On Function (Auto Turn-On)

• Suitable for integration into many factory-installed sound systems
  
  

Dimensions

• Width: 89 mm

• Height: 41 mm

• Length: 168 mm

Additional Technical Specifications:

• Frequency range: 10–40,000 Hz (−1 dB)

• Signal-to-noise ratio: over 99 dB

• Input sensitivity: 425 mV – 8.0 V

• Operating voltage: 8.5–16.5 V DC

• Short-term undervoltage: up to 7 V for a maximum of 5 seconds

• External amplifier fuse: 60 A

• Dynamic Headroom (DHR): up to 200 watts RMS per channel at 2 ohms under appropriate operating conditions

• Automatic power-on via high-level inputs

• Operating Indicator and Protection Status via LED

What's Included

• 1 × Musway NX175.4 4-Channel Class-D Amplifier

• High-level connection adapter with open cable ends

• RCA Input Adapter

• External fuse with fuse holder, as described in the user manual

• Mounting feet

• User Manual