THOR LEVEL 2 + ECHO THOR LEVEL 2 + ECHO is an advanced kit combining the powerful THUNDER speaker in a titanium-steel enclosure with a high-frequency ECHO driver. Deep lows and bright peaks produce a rich, full-bodied sound reminiscent of modern sports cars. Perfect for those seeking a balance between comfort and excitement. The system is perfectly suited for vehicles from 2005 onwards. Controlled via a mobile app. Included: THUNDER 2.0 ECU ECHO UPGRADE PRO