4 ohm output impedance subwoofer amplifier board

{"cid":"91219651","title":"50W*2 100W TPA3116D2 BT 5.0 HIFI Digital Power Subwoofer Amplifier Board for Audio","imgUrl":"https:\/\/img.chinax.com\/nimg\/20\/80\/a563a3766a50b5b79105623a734c-200x200-1.jpg","attrs":{"Price":"$9.90\/pieces 10-99 pieces","Brand Name":"creatall","Model Number":"CA-3169B","Minimum Order Quantity":"10 pieces","Place of Origin":"Guangdong, China","Application":"TPA3116D2 power amplifier board","Series":"TPA3116D2 power amplifier board","Mounting Type":"standard","Description":"TPA3116D2 power amplifier board","Package":"Yes","Channels":"3 (2.1)","Maximum Power Per Channel":"50W","Product Name":"TPA3116D2 Digital Amp","AMP Chip":"dual TPA3116D2","Max Output Power":"2*50W+100W","Power Supply":"DC12~24V"}}

{"cid":"91212211","title":"ZXY2207 600:10K Audio Isolator Power Amplifier Noise Reduction Module Board","imgUrl":"https:\/\/img.chinax.com\/nimg\/4e\/ac\/8700f0a860b85afaf4ecadb8722e-200x200-1.jpg","attrs":{"Price":"Negotiable","Brand Name":"ZXY","Model Number":"ZXY2207 600:10K","Minimum Order Quantity":"Negotiable","Delivery Time":"Stock Or 3 weeks","Certification":"RoHS,ISO9001,CE","Place of Origin":"Shenzhen,China","Payment Terms":"T\/T ,paypal transfer","Supply Ability":"1000K-pcs\/month","Packaging Details":"100pieces \/ Carton; Size:380mm*325mm*345mm","Model number":"ZXY2207 600:10K","Product name":"600:10K Audio Isolator Power Amplifier","Application":"Professional recording studio","Function":"Noise elimination","Advantage":"High sensitivity, high reducibility","Apply for":"Integrated circuit"}}

{"cid":"91222503","title":"4 Channel Bluetooth Amplifier 50W x 4 OEM Audio Power Amp Hi-Fi Home Stereo Speaker Receiver","imgUrl":"https:\/\/img.chinax.com\/nimg\/c6\/9b\/1786f128bbc5b0a51cbabb7d5b23-200x200-1.jpg","attrs":{"Price":"Negotiable","Brand Name":"OEM","Model Number":"BTA-450","Minimum Order Quantity":"300 pcs","Delivery Time":"40-50 days","Certification":"CE, Rohs, FCC, ETL, etc","Place of Origin":"China","Payment Terms":"L\/C, T\/T, Western Union,Paypal","Supply Ability":"50000 pcs per month","Packaging Details":"One piece Bluetooth amplifier in giftbox, 4 pcs in a carton.","Item":"Buletooth HiFi amplifier","Channel":"4 Channel audio amplifier","Power":"4 x 50 watts, RMS 4ohm","Frequency":"20-20K Hz","Type":"Class D HiFi power amplifier","Input":"Bluetooth, RCA, Optical, HDMI","OEM":"China OEM amplifier manufacturer"}}