2 5khz spl competition subwoofers

{"cid":"91196467","title":"Reliable 28 Mm Precision Acoustics Subwoofer Headset Driver Metal Frame","imgUrl":"https:\/\/img.silkroadsl.com\/nimg\/a4\/c5\/78f97c8702a0bac632b4bc0d07dd-200x200-1.jpg","attrs":{"Price":"USD 0.3 - 0.7\/pc","Brand Name":"YS","Model Number":"YDR28-4-100","Minimum Order Quantity":"5000 PCs","Delivery Time":"2-4 weeks","Certification":"RoHS","Place of Origin":"CHINA","Payment Terms":"L\/C, T\/T, D\/P, Western Union","Supply Ability":"500000 Pcs\/ Month","Packaging Details":"trays and carton","MATERIAL":"Metal frame","Power":"100 mW","Impedance":"100 ohm","Output":"115 dB","SIZE":"28*6.1 mm","TYPE":"Headphone transducer"}}