audio amplifier and filter | Electronics › Electronics › audio amplifier and filter This topic has 1 reply, 2 voices, and was last updated 8 years, 4 months ago by Ashutosh Bhatt. Viewing 2 posts - 1 through 2 (of 2 total) Author Posts May 26, 2016 at 8:52 am #4475 vivek dawnParticipant i want to kno the working principal of sub woofer music system. May 29, 2016 at 6:14 pm #13945 Ashutosh BhattParticipant if u want to know about speaker then u can just search on google but if you want to know about woofer circuit then its a LPF or BPF with very low cutoff frequency Author Posts Viewing 2 posts - 1 through 2 (of 2 total) You must be logged in to reply to this topic. Log In Username: Password: Keep me signed in Log In