Soundmax SX-N300.4 amplifier 4 channel

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

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Soundmax SX-N300.4 is a compact and well-tuned 4-channel Class AB power amplifier, designed for those who want to upgrade their car's sound system with better control, clearer sound image and reliable power. With 60W RMS per channel at 4 Ohm, it is an excellent choice for front systems, rear speakers or simpler active solutions where sound quality is the focus.

The power amplifier delivers 75W RMS per channel at 2 Ohm and can be bridged to provide 150W RMS x2 at 4 Ohm, which provides flexibility for different speaker configurations. The classic AB design contributes to a warm, natural and balanced reproduction across the entire frequency range 10–20,000 Hz, perfect for music listening where details and musicality are important.

The SX-N300.4 is equipped with both a high-pass filter and a low-pass filter, making it easy to adapt the power amplifier to different types of speakers and installations. The high damping factor of over 170 provides good control over the elements and contributes to a tight and responsive sound, especially in the mid-bass range.

With an operating voltage of 9–15 V and an input sensitivity of 0.2–6 V, the SX-N300.4 works smoothly with both original stereo and aftermarket units. A signal-to-noise ratio of 90 dB ensures a clean signal and low noise level even at higher volumes.

The robust chassis measures 262 × 182 × 53 mm, making the power amplifier easy to place while offering good cooling for stable operation over time. The Soundmax SX-N300.4 is a very good choice for those looking for affordable Class AB quality, reliable power and a natural sound in a compact 4-channel power amplifier.

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Technical data

• Number of channels 4 Channels
• Amplifier class Class AB
• Power into 2 ohms RMS 4x 75W
• Power into 4 ohms bridged RMS 2x 150W
• Power into 4 ohms RMS 4x 60W
• Frequency range 10 - 20,000 Hz
• High-pass filter 100 - 1,000 Hz
• Low-pass filter 40 - 400 Hz
• Damping factor >170
• Operating voltage 9 - 15 V
• Input sensitivity 0.2 - 6V
• Signal noise 90 dB
• Dimensions 262 x 182 x 53 mm