Mini Digital Buthtooth Class D Car Power Amplifier 2.1CH Subwoofer 40W (2x20W) Hi‑Fi Stereo Booster for MP4/DVD/Home BASS

Compact Class D 2.1-channel power amplifier delivering 40W total output (2x20W). The enclosure is machined from all-aluminum with a wire-drawn oxidation surface treatment. The entire unit features an all-metal construction finished in a fine-sand anodized black coating to emphasize texture and durability. High and low frequency bands are adjustable independently so you can dial in preferred treble and bass levels. Power-stage components include a red-ring inductor paired with a large-capacity filter for stable, punchy low-end response.