Hi. I have 4 of these sub woofers. I bought them new in the old school days when I was a car stereo installer. These are 4 ohm. I used these in my two cars with a box that I built two in each car.These are the best most natural sub ever made. But you need to build a specific box and run a lot of power to them. They have a very articulate sound. Never boomy sounding. But very rich low and fast. In the day we compared a lot of subs + speakers + amps + decks. These are best for an audiophile type person that can appreciate what they do. I used them for around 7 years and have been sitting in the house since. $200 each. Please call show contact info
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