This Blaupunkt 10" Pro Component driver woofer is a vintage, old school piece made in the USA. It is in excellent used condition and has been carefully stored in its open box. The speaker size is 10 inches with a single voice coil and an unknown RMS power. The brand is Blaupunkt and the model is Pro Comp PC150. It is a non-enclosed, non-powered type of car subwoofer. This item is a great addition to any car audio system and is perfect for those who appreciate classic audio equipment.