Overall, the product is ok. It's a lower priced product that is better than a lot of products in the same pricetag, but there is still far better out for a little more money. If you are doing a strict budget build, or just looking for something to add to an old pre-existing system, this could work. I would recommend it to the newbies in the audio field to do some trial-and-error work with, and to just play around with the acoustical properties of your vehicle. It's great for the amateurs to the field, but if you are looking for a more professional sound, I would recommend going with a better quality item.
Speaker Type: Passive
Speaker Diameter: 12"
Nominal (RMS) Output Power: 350 Watt
Max (RMS) Output Power: 1200 Watt
Response Bandwidth: 30 - 1000 Hz
Input Impedance: 4 Ohm
Sensitivity: 83 dB/Watt
Magnet Type: Ferrite
Connectivity Technology: Wired
On a side note, I did have one of these from a few years ago that survived a crash that totaled the vehicle, and the sub still functioned mostly flawlessly with a bent frame, until the voicecoil melted apart from too much friction.