Mini Digital Buthtooth Class D 2.1CH Power Amplifier — 40W (2x20W) Hi‑Fi Stereo Subwoofer for MP4/DVD/Home BASS Player, Wide Application

Constructed from all aluminum, the unit’s surface is treated with a wire-drawing oxidation process. The amplifier features an all-metal body finished with a fine-sand, anodized black spray that enhances its tactile texture. Independent high- and low-frequency controls allow you to tune the exact frequency bands you prefer. Audio components include a red-ring inductor plus a large-capacity filter to support robust bass performance.