You can't connect active audio such as computer audio, and it is not suitable for connecting passive subwoofer. The four pillars behind the power amplifier are output connectors, and you can't connect headphones or lotus plugs such as 3.5 mm.
eBay
50W Bluetooth HiFi Power Amplifier Mini Audio Digital Stereo Car FM AMP Remote. 50W Bluetooth HiFi Power Amplifier Mini Audio Digital Stereo FM Car AMP Remote. 220V 50W Car Accessory Bluetooth HiFi Bass Audio Amplifier USB TF MP3 FM.
eBay
Mini HIFI digital bluetooth Audio Leistungsverstärker. Verstärkertyp: HiFi-Leistungsverstärker. 1 x Leistungsverstärker (Netzteil nicht enthalten). Bei Verwendung in einem Lkw (24 V Spannung) müssen Sie die Spannung mit einem Reduziergerät auf 12 V reduzieren, bevor Sie das Gerät verwenden können.
eBay
1 x Amplifier. 1 x User Manual. Gold-Plated Connectivity: Equipped with gold-plated 6.35mm outputs for optimal signal transfer and durability, ensuring long-lasting performance. Color: Black. Child Proof Door Lever Lock Door Handle Locks with Adhesive Handle Safety lock a.
eBay
Dual Mic Inputs for Ultimate Karaoke Experience: Take your karaoke nights to the next level with two dedicated mic input slots. Seamlessly switch between TF card, U disk, MP3 format play, and Bluetooth 5.0 wireless connection to keep the music flowing non-stop.
eBay
Power HA400 Headphone Amplifier 4 Channels Mini Audio Stereo with Power Adapter for Music mixer Recording studio monitoring. Features: 4-channel stereo headphone amplifier HA400. 4-channel stereo headphone amplifier for all types of headphones.
eBay
The Aiwa Mini Compo Stereo Integrated Amplifier 16 Model AA-16BH is a compact and versatile Hi-Fi amplifier from the renowned brand Aiwa. This silver amplifier is designed to provide high-quality sound reproduction for your stereo audio system. With its integrated amplifier function, the Aiwa AA-16BH model offers a convenient and space-saving solution for enhancing your home audio experience. Perfect for music lovers looking to upgrade their audio setup, this amplifier delivers clear and crisp sound quality.
eBay
Output power: 2 x 30W. Input priority is USB, AUX, Bluetooth. Output to passive speaker via L/R channel, or 3.5mm port to headphone/ active speaker. 1 x Amplifier board. Input: U drive (FAT32 format, max 32GB), AUX, Bluetooth.
eBay