25 cm (10) Double Voice Coil Active (amplifier on board) Subwoofer. Good condition both cosmetically and Functionally. Some minor scuffs on the side. I bought both this and the smaller version to try and my van. Both sounded great but kept the smaller one as. It fits the space better. Last image shows the connector you need, but not included. In case you don’t know these, they are active subs (amp built in) which provide a simple (just provide power and a subwoofer input from stereo) and high quality boost to the bass. They are not window shattering bass monsters, but just make everything sound better and. “Fill” out the sound. I’m a former studio sound engineer and don’t use any other brand in vehicles now. Collection from Fleet Hampshire welcome, or can be posted, well packaged.