SoundQubed HDS2.3 6.5" Subwoofer 500W RMS 1000W Peak D2 / D4SoundQubed HDS2. 3 6. 5" Subwoofer 500W RMS 1000W Peak D2 D4 is a compact bass option for builds where space is tight but you still want real output. Sold by AudioSellerz. com. If you are working with a smaller enclosure, a custom build, a motorcycle setup, an under seat project, or any install where every inch matters, this little HDS2. 3 is built to make the most of limited room. It gives you the kind of strong, punchy bass response that makes a