2.1 channel power amplifier board Output: 2 x 30 W main channels plus a 60 W subwoofer channel Configuration: 2.1 channel, providing two main outputs and an additional subwoofer output Purpose: delivers amplified power to drive speakers and enhance bass performance Multifunctional amplifier board Function: Amplifies weak signals from the audio source or preamplifier and drives the connected speakers Key benefits Improves loudness and bass for smaller or bookshelf speakers by adding a dedicated subwoofer channel Combines stereo and subwoofer amplification on a single board, simplifying DIY audio setups Designed to work with standard audio sources and preamplifiers, enabling straightforward integration Use scenarios Home stereo upgrade: pair with bookshelf speakers and a compatible source to achieve fuller sound with better bass DIY 2.1 speaker project: build a compact 2.1 system in a custom enclosure for audio setups Small home theater or computer audio: power compact speakers for enhanced music and movie playback