Soundmax SX-N700.4

Soundmax SX-N700.4 – 4-channel Class AB amplifier 140W x4 @ 4 Ohm with power, control and musicality

Soundmax SX-N700.4 is a powerful 4-channel Class AB amplifier, developed for those who want to drive demanding speaker systems with both strength and musical precision. With 140W RMS per channel at 4 Ohm, it delivers stable power for front systems, midbass drivers or active setups where control and sound quality are essential.

When bridged, the amplifier delivers 350W RMS x2 at 4 Ohm, making it well suited for powerful midbass drivers or smaller subwoofers. The classic AB topology contributes to a warm and dynamic sound character across the full frequency range of 10–20,000 Hz, with good separation and natural reproduction.

The SX-N700.4 is equipped with both high-pass filters (100–1,000 Hz) and low-pass filters (40–400 Hz), providing great flexibility for active crossover setups. With bass boost up to 12 dB at 45 Hz, the low end can be reinforced when needed, while a damping factor above 170 ensures strong control over the drivers and a tight, responsive sound.

Thanks to the high-level input, the amplifier can easily be integrated with factory head units, and with an input sensitivity of 0.2–6 V, it works just as well with aftermarket sources. Three 35A fuses provide secure power handling, and a signal-to-noise ratio of 90 dB ensures clean reproduction even at higher volume levels.

With its generous dimensions of 412 × 182 × 53 mm, the SX-N700.4 is built for stable operation and effective cooling during extended listening sessions. Soundmax SX-N700.4 is an excellent choice for those seeking powerful Class AB performance, high control and reliable sound quality in a robust 4-channel amplifier.