cardioid bass speaker 143db high spl

{"cid":"91225427","title":"K-21S 21 inch professional 1200w compact neodymium speaker subwoofer","imgUrl":"https:\/\/img.chinax.com\/nimg\/c2\/be\/27faacfd03854f0bffb484186a6e-200x200-1.jpg","attrs":{"Price":"depand on quantity","Brand Name":"lmhf","Model Number":"K-21S","Minimum Order Quantity":"2","Delivery Time":"10-15 days","Connector":"2NL4","Payment Terms":"T\/T","Impedance":"8 ohm","Supply Ability":"500pcs\/month","Size":"750*600*570mm","Frequency":"30 - 100 Hz","Model":"K-21S","Components":"21 inch, 115mm voice coil, neodymium","Packaging Details":"carton","Net weight":"49kg","Place of Origin":"Made In China","Certification":"CE, ROHS","RMS power":"1200W","Cabinet":"Russia birch plywood, dark grey brown polyurea","Max SPL":"138 dB"}}

{"cid":"91220993","title":"Professional Audio Speaker Single 18 Inch Subwoofer Featuring Passive Crossover for Seamless Integration with Full Range Audio Systems","imgUrl":"https:\/\/img.chinax.com\/nimg\/9b\/06\/202d4337c4cc0492814d6bbb1881-200x200-1.jpg","attrs":{"Price":"Negotiable","Brand Name":"XB-AUDIO","Model Number":"SW118","Minimum Order Quantity":"50PCS","Delivery Time":"30-60days After Deposit","Certification":"CE,ISO","Place of Origin":"CHINA","Payment Terms":"T\/T, Western Union, MoneyGram","Supply Ability":"300PCS\/month","Name":"18-inch passive subwoofers","Brand customization":"OEM","Color":"Black","Rated power:":"800W","Frequency Response":"34Hz-220kHz \u00b13dB","Connectors":"2\u00d7NEUTRIK NL4","Maximum Sound Pressure":"130dB","Dimensions":"560\u00d7540\u00d7740 mm"}}