preferably new. anyone have a set or 2 laying around that are new they arent using? I need a total of 2 sets, but will take what I can get right? PM me here or email me ZombieSoldier01@yahoo.com
They will certainly work on head unit power, but they won't sound as good as they could if they had some real power. I see VK6 is still listed on Massive Audio's web store, but they're not in the 2013 product catalog and I can't order them.
The SK6 II component set is similar to VK6, except it's a very shallow woofer. I'm not sure you'd be happy with the bass performance on the SK set, but again you're looking at compromised performance as a trade-off for efficiency. The CK6X set on ~100W per side would be a big upgrade all around.