Soundmax SX-N300.4

Soundmax SX-N300.4 – 4-channel Class AB amplifier 60W x4 @ 4 ohms with clean sound character and stable operation

Soundmax SX-N300.4 is a compact and well-balanced 4-channel Class AB amplifier, designed for those who want to upgrade their car audio system with improved control, clearer sound reproduction and reliable power output. With 60W RMS per channel at 4 ohms, it is an excellent choice for front systems, rear speakers or simpler active setups where sound quality is the main focus.

The amplifier delivers 75W RMS per channel at 2 ohms and can be bridged to provide 150W RMS x2 at 4 ohms, offering flexibility for various speaker configurations. The classic Class AB design contributes to a warm, natural and well-balanced sound across the full frequency range of 10–20,000 Hz, making it ideal for music listening where detail and musicality are essential.

The SX-N300.4 is equipped with both high-pass filters and low-pass filters, making it easy to adapt the amplifier to different types of speakers and installations. The high damping factor above 170 provides excellent control over the drivers and contributes to a tight and responsive sound, especially in the midbass range.

With an operating voltage of 9–15 V and an input sensitivity of 0.2–6 V, the SX-N300.4 integrates smoothly with both factory head units and aftermarket sources. A signal-to-noise ratio of 90 dB ensures clean signal delivery and low noise levels even at higher volumes.

The robust chassis measures 262 × 182 × 53 mm, making the amplifier easy to place while still offering effective cooling for stable long-term operation. Soundmax SX-N300.4 is an excellent choice for those seeking affordable Class AB quality, reliable power and a natural sound character in a compact 4-channel amplifier.