Review on 🔊 High-Quality Bluetooth 5.0 Power Amplifier 2 Channel Stereo Mini Hi-Fi Integrated Amp 2.0 - 50W x 2 USB Wireless Audio Receiver for Home Speakers & Headphones - Douk Audio Tone (Silver) by Sarah More

Pros: * Item comes in a sturdy box - thick foam padding matches the amp and power supply * 4 input source selection with volume control as a selector * Solid rubber feet on the bottom help keep the amp in place * Bluetooth range in a room with obstacles over 50 feet * Power button allows you to switch to standby mode without turning off the unit completely * LED indicator Front panel displays input source input signal and visual volume level for each channel * Seller actually responds to most inquiries via email: nobsound@doukaudio.com Cons: • Volume control requires 3 full turns to go from silence to full volume • some white noise at medium volume - at headphones not so noticeable • the manual has a table showing the ratio of the output power in watts for different power supplies (12, 21 and 24 volts), but the power supply that comes with the amplifier is 19 volts? Nobsound customer service said any 12-24 volt power supply will do, but they don't really know how much power a 19 volt power supply will provide. The volume is acceptable when connected to a device with an amplified headphone jack, e.g. a smartphone, portable CD player, etc. NOTE: The micro connector of the supplied USB cable is slightly longer than standard micro USB connectors. Be sure to keep it as it is the only cable that will really fit if you plan to connect your amp to your computer. It is also not possible to use the USB port to connect anything other than a computer, even with the right combination of USB RCA or 3.5m adapters/cables. The only way to connect a USB audio source is to a USB port on your computer using the included cable. My Mac recognizes Nobsound as JiehiBR17. I hope this helps you decide whether to buy or use this little amp.