From Lii Song / Lii Audio, the entry level F-6, 6.5 inch full range speaker is a good full range unit with impressive performance, as well as economic choice to get to know the brand. This one has its tone upgraded from old version and is offered exclusively for e-commerce platform distributors or local representatives. Technical Data: Rated power——40W Maximum Power——80W Nominal impedance Z——8 Ohm Frequency response——-fu-17000Hz Mean sound pressure level——93 dB(2,83/1m) Resonance frequency fs——43Hz Magnetic induction——1.0T Total Q factor Qts——0.65 Equivalent volume Vas——50L Weight (a pair): 1.8KG