Finally got my amp and sub install in my F30 finished, so worth it! : r/BMW
Adding a Sub to a 3 series F30 | AVForums
Vibe Optisound For BMW 3 Series F30 F31 Car Audio Underseat Subwoofers 1 Pair | eBay
How to Install BavSound Under Seat Subwoofer - BMW F30 - YouTube
F30/F80 Full Bass Upgrade Level One – Musicar Certified Sound
BMW 3 SERIES F30 F80 M3 11+ STEALTH SUB SPEAKER ENCLOSURE BOX SOUND BASS 10 12 | eBay
Match underseat subwoofers to fit BMW 3 series F30 F31 F34 F35 1 pair 150w RMS | eBay
Audio Upgrade Kit For Bmw F30 F31 3 Series Power Amplifier Subwoofer Car Door Midrange Speaker Front And Rear Tweeter And Covers - Multi-tone & Claxon Horns - AliExpress
Eton UG B100 XN BMW 10cm Koax-Lautsprecher Plug and Play, 1er, 3er, 5er, Heck ect.: Amazon.co.uk: Electronics & Photo
Audison Front Speakers, and Subwoofers Bundle Compatible With 12-21 BMW 3 Series Sedan F30 Base Sound System - Creative Audio
BMW 3 SERIES F30 F80 M3 11+ STEALTH SUB SPEAKER ENCLOSURE BOX SOUND BASS 10 12 | eBay
Vibe BMW8-V4 BMW 345 Watts 1, 3, 4, 5, 6 Series X1 & X3 8" Underseat Factory Fit Car Sub Subwoofers & Vibe 300 Watts 2 Channel Amplifier Line Converter & Amp Kit Package