Vibe Optisound 8 Underseat Active Car 8 Subwoofer Built In Amplifier 900w. PREFER COLLECTION BUT CAN POST. The item “Vibe Optisound 8 Underseat Active Car 8 Subwoofer Built In Amplifier 900w” is in sale since Wednesday, December 8, 2021. This item is in the category “Vehicle Parts & Accessories\In-Car Technology, GPS & Security\In-Car Entertainment\Subwoofers”. The seller is “seller_131285″ and is located in Leicester. This item can be shipped to United Kingdom.