90db signal to noise ratio amplifier board

{"cid":"91219651","title":"350W Subwoofer Amplifier Board DIY Subwoofer Speaker Board With High Power Output 350W","imgUrl":"https:\/\/img.chinax.com\/nimg\/39\/4d\/d1e34e947d8e80879494aecccbd1-200x200-1.jpg","attrs":{"Price":"$8.80 - $12.80\/sets","Brand Name":"creatall","Model Number":"CA-3501","Minimum Order Quantity":"10 sets","Application":"350W Subwoofer Amplifier Board","Type":"350W Subwoofer Amplifier Board, Audio Amplifiers","Series":"350W Subwoofer Amplifier Board","Description":"350W Subwoofer Amplifier Board","Place of Origin":"Guangdong, China","Manufacturer":"creatall"}}

{"cid":"91222503","title":"DSP Controlled 1000W RMS Subwoofer Amplifier with Auto Power On\/Off and 115Vac\/230Vac Switchable","imgUrl":"https:\/\/img.chinax.com\/nimg\/54\/09\/1cdb9878279d8e6de96f7b2fa9de-200x200-1.jpg","attrs":{"Price":"$135.50-140.50","Model Number":"SUB-1000DSP","Minimum Order Quantity":"300","Place of Origin":"Guangdong, China","Output power":"1000W RMS @ 4 \u03a9","Total harmonic distortion":"<1%","Standby power":"TOTAL<0.5W","Input sensitivity":"500mV","Signal to noise ratio":">90dB","Variable volume":"-60~10dB","Auto off time":"Disables,5min,10min,15min,20min,25min,30min","Protection features":"Cliplimit, DC, Short circuit, Over current, Overheat","Operating voltage":"115Vac\/230Vac SWITCHABLE","Dimensions":"W310xH254mm","Channel":"2 (2.0)","Amplifier type":"Class D","DSP controlled":"Yes","Remote control":"IR","Auto power":"On\/Off signal input"}}

{"cid":"91221090","title":"CB-2500\/CB-4150 Class D Professional Stereo Power Amplifier \/ High Power Amplifier","imgUrl":"https:\/\/img.chinax.com\/nimg\/e4\/c2\/e2594015ac88f46f741b64db931d-200x200-1.jpg","attrs":{"Brand Name":"KPARTY","Model Number":"CB-2500\/CB-4150","Place of Origin":"KPARTY CHINA"}}