Bluetooth board and crossover from KMA’s Elder bluetooth speaker. Drivers were “borrowed” from an apple air drop speaker (being an anderoid guy I didnt mind). Copper tubes on each end act as porting, strictly guesswork on the length & area. Volumn, LEDs and aux are in a plate mounted on the bottom. The speaker lives in my shop at about head height so I didnt want the LEDs in my eyes and it would have been a pain to look or reach behind. Front baffle is raw oak, carcass is 3/8″ mystery ply.