MK3.5 Subwoofer Fitting - Ford Focus Club - Ford Owners Club - Ford Forums
Columbus Car Audio on X: "Custom built subwoofer enclosure and amp mounting in the cargo/trunk space of this 2016 Ford Focus RS. So yes, you can have awesome sound without giving up
Quick SQ Build Log: 2014 Ford Focus ST: Morel, Mosconi, Arc, AM EVO 8" - Car Audio | DiyMobileAudio.com | Car S… | Ford focus, Ford focus st, Car audio installation
Upgraded my Sony sub to a custom NVX unit, added a dedicated sub amp, and disabled Sony DSP using FORScan…it now sounds incredible!! : r/FocusST
Focus 2012-2018 5Dr w/ Subwoofer Cargo Area Liner | Accessories.Ford.com
Discontinued Obsolete SKU MTX Audio
2015 Ford Focus Sony Trunk Mounted Subwoofer OEM | eBay
SB-F-FOC5DR/10TW3 - Car Audio - Stealthbox® - Ford - JL Audio