I'm using a 350w plate amp with my sub, which is a dual vc in 4 Ohm config, and it works great. I think your concern is that they will be drawing a lot of current in that config, and that is a valid concern IMO, but I think the 500W amp should be able to handle it. It's on sale right now too...just got the flyer last week 20% off on the 500w and 1000w.