Set 4 Coffers Speakers Pioneer TS-A1600C Front Opel Astra H 2004>350W | eBay
Audio System XFIT OPEL ASTRA J EVO2 Speaker for Opel Astra J 2009 -> | eBay
Opel Astra H Tutorial: How To Change Speakers - YouTube
6.5” Fast Rings For Opel Astra H J G Front Speaker Update Foam Pad Self Adhesive Sponge Washer Bass Blocker Enhancer System Kit - Sound & Heat Insulation Cotton - AliExpress
How To Install/Remove New Speakers on Astra H (3 Door Version) - YouTube