COMPACT, HIGH-EFFICIENCY 4-CHANNEL AMPLIFIERThe Sony XM-S400D is a versatile 4-channel power amplifier designed to deliver clean, reliable amplification that enhances the performance of your vehicle’s speakers. Built for both factory upgrades and modest aftermarket systems, it provides dependable power with minimal distortion for fuller, clearer sound. STABLE, LOW-DISTORTION OUTPUTFeaturing a high-efficiency design, the XM-S400D supplies balanced power across all four channels with low noise and distortion. This helps your speakers perform with improved dynamics, tighter response, and more clarity — even at higher listening levels. COMPACT, RUGGED DESIGNConstructed with quality components and a durable chassis, the XM-S400D stands up to everyday automotive environments. Its compact footprint allows for flexible installation in tight spaces — such as under seats, behind panels, or in trunks — without sacrificing performance or reliability. PRECISE AUDIO ADJUSTMENTEquipped with accessible gain and crossover controls, this amplifier lets you fine-tune output to match your speakers and listening preferences. Straightforward adjustment points help you dial in balanced, engaging sound across front and rear channels. EFFICIENT THERMAL MANAGEMENTDesigned with thoughtful heat-dissipation features, the XM-S400D maintains stable operation during extended listening sessions. Its thermal efficiency supports consistent performance under load and contributes to long-term reliability. VERSATILE APPLICATIONSWhether powering front and rear speakers in a daily driver or forming the foundation of a larger audio upgrade, the Sony XM-S400D delivers focused, dependable amplification that boosts overall sound quality — making your music clearer, more dynamic, and more enjoyable on every drive. | 100 x 4 Number of Channels 4 Class D Peak Power Rating (Watts) RMS Power Rating (Watts x Channels) - 4 Ohms 45 x 4 RMS Power Rating (Watts x Channels) - 2 Ohms N/A RMS Power Rating (Watts x Channels) - 1 Ohm N/A RMS Power Rating - Bridged N/A Minimum Impedance Unbridged (Ohms) 4 Minimum Impedance Bridged (Ohms) N/A THD at Rated RMS Power 1% Bulit-in Crossover - Low Pass Yes Built-in Crossover - High Pass Yes High Pass Crossover Frequency (Hz) 120hz Low Pass Crossover Frequency (Hz) 120hz Signal-to-Noise Ratio 83dB Bass Boost N/A Bass Remote Included No Fuse Rating 15A CEA-2006 Compliant Yes Maximum Power Wire Gauge Size Warranty 1 Year
