Kenwood KSC-SW11 1 Subwoofer Speaker.
Looks to be in good physical condition, but not known whether working or not. No leads or instructions provided, but these things are over £100 on Amazon.
Collection only from Bramcote.
Car Subwoofer - May Need Repair (Bramcote Hills NG9)
This offer has been gifted to someone and is no longer available.