Pedicab stereo system made from fiberglass and MDF. The subwoofer is a Tangband neodymium 6.5 in. For the mids and highs, Polk mobile monitor 6.5" crossover/ tweeter. I've upgraded the subwoofer to a DD 6.5 ESP and added a Atom 900.1. It all runs of a 60amp stepdown converter powered by a 48v lithium battery.

Tangband W6-1139SI
https://www.parts-express.com/Tang-Band-W6-1139SI-6-1-2-Subwoofer-264-832

Polk MM6501
https://www.crutchfield.com/S-FUSLJwmVM5M/p_107MM6501/Polk-Audio-MM6501.html

Precision Power Atom 1000.4
http://precisionpower.com/product/a1000-4/

DD 1506 ESP
https://ddaudio.com/product-spotlight-dd-audios-new-1506-subwoofer-with-6-5-esp/

Precision power Atom 900.1
http://precisionpower.com/product/a900-1/