I bought a half-dozen of these Vifas when PE closed them out years ago. I'm preparing to use them in my new car, but I can't find much info. They are similar to these at Madisound , but the specs are totally different. Any ideas as to whom the ones I purchased were manufactured? Either that, or PE/Madisound one have wrong info. I will say that the ones that I've used already had NO issues running from a bridged ST-3004 (225 RMS) crossed at 50hz/18db. Stout little things.