Skip to content
Promo Strip — Free Shipping / Secure Checkout / Returns / Warranty
Free Nationwide Shipping
On all orders
Secure Checkout
Safe & encrypted
30-Day Returns
Hassle-free
3 Year Warranty
Quality guaranteed

Product Overview

🔹 Why Choose the NX125.4?

🔹 Powerful 4-channel output in a compact body
🔹 Clean, dynamic sound with audiophile-grade clarity
🔹 Flexible crossover tuning
🔹 OEM-friendly integration
🔹 Reliable performance for daily drivers and custom builds

NX125.4

Product Specifications

Power RMS @ 13.4 V (≤1% THD+N)
Watt @ 4 Ohm 4 x 80
Watt @ 2 Ohm 4 x 135
Watt @ 4 Ohm bridged 2 x 270
Power RMS (DHR)*
Watts @ 2 Ohms per channel 170
Frequency Range 10 - 40000 Hz @ -1 dB
Signal-to-noise Ratio > 99 dB
THD+N @ 5 W < 0.02 %
Input Sensitivity 425 mV - 8.0 V
Filter Section CH1/CH2
Low Pass Filter or High Pass Filter 50 - 5000 Hz
Filter Section CH3/CH4
Low Pass Filter or High Pass Filter 50 - 5000 Hz
Operating Voltage 8.5 - 16.5 V (max. 5 sec. down to 7 V)
Start-stop Capability: Yes
High Level Input with EPS: Type D
Auto Turn-on: Yes
Bass Level Remote Controller CH3/CH4
: NA
Fuse (external): 50 A
Dimensions
Width 89 mm
Height 41 mm
Length 148 mm

Product Description

⚡ NX125.4 4-Channel Class D Amplifier

Compact Power. Precision Control. Pure Sound.

The NX125.4 is a high-efficiency 4-channel digital Class D amplifier designed for modern car audio systems that demand strong output, clean sound, and flexible tuning — all in a compact, installer-friendly size.

Whether you’re upgrading factory speakers, running high-performance components, or bridging channels for more power, the NX125.4 delivers smooth, distortion-free performance with full system control.

Musway USA