Amazon.com: Sunbuck Bluetooth 5.0 Stereo Power Amplifier - 250W Dual Channel Sound, 12V Audio Stereo Receiver w/RCA, USB, SD, MIC in, LED Display, Remote, Bass & Treble Control, for Home Speakers, AS-25BU :
Yamaha RX-V685 7.2-Channel AV Receiver is on sale at Amazon
Amazon.com: [Upgraded] Bluetooth Amplifier, 1Mii Bluetooth Digital Amplifier, Bluetooth 5.0 Stereo Audio Amplifier Receiver Long Range 2.1 Channel Mini Hi-Fi Amp for Home Speakers 100W x 2 w/Bass & Treble Control :
Amazon.com: Yamaha HTR-5760 7.1-Channel Digital Home Theater Receiver (Discontinued by Manufacturer) : Electronics