Yamaha Natural Sound 100 Watt Phono Sub Out Stereo Receiver, Black (RS300B) | Extreme Electronics
Amazon.com: KEiiD Stereo Receiver, WiFi Bluetooth Wireless Streaming, Subwoofer Output for 2.1 Home audio System, Optical AUX Input for Bookshelf Passive Speaker System, App Control with Clock Alarm & Sleep Timer :
Fosi Audio BT30D Bluetooth 5.0 Stereo Audio Receiver Amplifier 2.1 Channel Mini Hi-Fi Class D Integrated Amp 50 Watt x2+100 Watt for Home Outdoor Passive Speakers/Subwoofer Powered Subwoofer - Walmart.com
AIYIMA B01 2.1 Channel Bluetooth Amplifier Receiver with Subwoofer Output 50W +50W +100W Class D Integrated Amp - Walmart.com
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