Soundmax SX-LX4125.4D

Soundmax SX-LX4125.4D – 4-channel Class D amplifier 125W x4 @ 4 ohms with compact power and high flexibility

Soundmax SX-LX4125.4D is an efficient and versatile 4-channel Class D amplifier, developed for those who want stable power output, low heat generation and flexible use in a compact format. With 125W RMS per channel at 4 ohms, it is an excellent choice for driving front systems, rear speakers or smaller midbass drivers with good control and clean sound reproduction.

The amplifier delivers 125W RMS per channel also at 2 ohms and can be bridged to provide up to 370W RMS x2 at 4 ohms, making it easy to adapt to different system configurations. The wide frequency range from 10 to 45,000 Hz ensures high precision and detailed reproduction across the entire spectrum, whether the focus is on musical accuracy or more output-oriented builds.

The SX-LX4125.4D is equipped with adjustable high-pass filters (50–500 Hz) and low-pass filters (50–250 Hz), providing excellent control for active crossover setups. Thanks to the high-level input, the amplifier can be easily integrated with an OEM head unit without additional accessories, and the wide input sensitivity range of 0.25–8 V makes it compatible with both factory and aftermarket source units.

With a signal-to-noise ratio of 90 dB, the SX-LX4125.4D delivers clean and stable sound without unnecessary interference. The efficient Class D design results in low power consumption and minimal heat generation, making the amplifier a reliable choice even in tight installation spaces.

Soundmax SX-LX4125.4D is an excellent option for those seeking a compact form factor, flexible power output and modern Class D efficiency – an amplifier that performs just as well in simple upgrades as in more carefully planned audio builds.