Soundmax SX-N500.4

Soundmax SX-N500.4 – 4-channel Class AB amplifier 90W x4 @ 4 ohms with warm sound character and stable control

Soundmax SX-N500.4 is a powerful and well-balanced 4-channel Class AB amplifier, developed for those who appreciate musical, clean and controlled sound reproduction. With 90W RMS per channel at 4 ohms, it delivers stable power for front systems, rear speakers or active setups where sound quality and control are the main priorities.

At 2 ohms, the amplifier delivers 125W RMS per channel and can be bridged to 250W RMS x2 at 4 ohms, providing flexibility for different system configurations. The classic Class AB design offers a warm and dynamic sound signature with excellent detail across the entire frequency range of 10–20,000 Hz – perfect for music-focused systems where balance and precision matter more than extreme output.

The SX-N500.4 is equipped with both high-pass filters (100–1,000 Hz) and low-pass filters (40–400 Hz), making it easy to adapt the amplifier for everything from full-range speaker operation to simple active crossover setups. The high damping factor >170 contributes to excellent control over the drivers, especially in the midbass range, resulting in tight and responsive sound.

With an operating voltage of 9–15 V and an input sensitivity of 0.2–6 V, the SX-N500.4 integrates smoothly with both OEM head units and aftermarket sources. A signal-to-noise ratio of 90 dB ensures a clean signal without unwanted noise, even at higher listening levels.

The amplifier features a robust chassis and measures 310 × 182 × 52 mm, providing effective cooling and stable operation even during extended listening sessions. Soundmax SX-N500.4 is an excellent choice for those seeking classic Class AB sound, reliable power output and high sound quality in a solid and versatile 4-channel amplifier.