Audison Front Speakers, Amplifier, and Subwoofers Bundle Compatible With 04-11 BMW 1 Series 5 Door E87 Base Sound System - Creative Audio
BMW E87 Subwoofer Upgrade / Car Hifi Einbauservice CSP Nürburgring
Maxxcount Custom Fit Subwoofer-Box Leergehäuse für BMW 1er E87 : Amazon.de: Elektronik & Foto
MB QUART Aktiv-Box QB-250 BMW 1 | ARS24.com
ETON B195 Neo BMW Untersitzbass für BMW Fahrzeuge E81,E82,E87,E88,E90,E91,E92,E93,E63,E64,E83,E70 usw.
Aftermarket Underseat Subwoofer for 1 series/ 1M? - BMW 1 Series Coupe Forum / 1 Series Convertible Forum (1M / tii / 135i / 128i / Coupe / Cabrio / Hatchback) (BMW E82 E88 128i 130i 135i)
Installing a subwoofer in a bmw E87 | Baby BMW Forum