A3 Audio Amplifier, USB/SD/FM/AUX, 2-Channel

Description

A3 USB/SD/FM/AUX 2ch Audio Amplifier Multifunctional A3 stereo amplifier — a compact and versatile solution for home, cafes, offices, and small audio setups. It supports multiple input formats (USB, SD cards, radio, FM, AUX), plays audio directly, and amplifies the signal to two channels for connecting speakers. Main specifications Parameter — Value/description Format — Stereo amplifier, 2 channels (Left + Right) Supported inputs — USB, SD/microSD slot, AUX/Line-in, FM radio Playback formats — MP3 / WAV / (and others — to be confirmed) Output power — (specify rated power per channel, e.g. 2×50 W or other) Frequency range — (e.g. 20 Hz – 20 kHz; to be confirmed for the model) Signal-to-noise ratio — (specify if known) Harmonic distortion (THD) — (if data available) Power supply voltage — AC 220 V/DC (if external power is supported) Housing material — Metal / aluminum / plastic Dimensions/weight — (specify if known) Functions and features Media inputs — connect USB flash drives and SD/TF cards with audio files FM radio — built-in receiver for listening to radio stations AUX/Line-in — connect external audio sources (phone, tablet, laptop, etc.) Volume control, channel balance Signal stability — overheating and overload protection (if provided) Easy installation — compact dimensions, mounting holes (if present) High-quality amplification — clean sound without distortion (when operating within the stated power range) Advantages Versatile device — replaces several components at once Easy to use — mode switching, input selector An excellent solution for sound in small rooms Convenient connections — supports USB / SD / AUX Built-in FM radio as an extra feature Package includes A3 USB/SD/FM/AUX 2ch amplifier Power cable / adapter (if an external power source is provided) User manual