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
2011-2012 FORD FOCUS SEDAN DUAL SUB BOX - Sound Off Audio, Inc.
Ford Focus XR5 2004-2011 10inch sub Fibreglass subwoofer box | eBay
FORD FOCUS MK1 NEW STEALTH SUB SPEAKER ENCLOSURE BOX SOUND BASS AUDIO CAR 12 10 | eBay
NVX BE-FDFOCHBG3-VS102 Sub Box for select 2012-2018 Ford Focus
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
MDF closed subwoofer enclosure for Ford Focus MK2 | eBay
Discontinued Obsolete SKU MTX Audio
Factory stereo and subwoofer | Page 2 | Ford Focus RS Forum
Amazon.com: Q-Logic Customs Compatible with Ford Focus ZX3 SVT3 Unloaded 10" Subwoofer Enclosure C1-FOC110 : Electronics
Discontinued Obsolete SKU MTX Audio
DD Audio - 2016 Ford Focus RS sound upgrade by 514... | Facebook
Ford Focus Subwoofer Specs and Replacement Options - YouTube
Discontinued Obsolete SKU | MTX - Serious About Sound®
Focus ST Extreme SPL Build- UPDATE! | Ford Focus ST Forum
Amazon.com: NVX BE-FDFOCHBG3-VS102 Compatible Custom 500W RMS 10" Loaded Subwoofer Enclosure for 2012-2018 Ford Focus : Electronics
Q Logic Q Customs Ford Focus Single 10" Sub Enclosure | Q Logic Enclosures
How To Fiberglass a Custom Sub Box | Page 3 | Ford Focus ST Forum
JL Audio 2012-2018 Ford Focus 5-Door Hatchback Subwoofer Stealthbox | Audio Express | Western United States
SB-F-FOC5DR/10TW3 - Car Audio - Stealthbox® - Ford - JL Audio
ZEnclosures 2-10" Subwoofer Sub Speaker Box for the 2013-2018 FORD FUSION | eBay
FBford01 Ford Focus Mk1Fit-Box subwoofer enclosure