While I don't have the new CS-6000/CS-4000 yet, The 2U space CS-4000 is a POWER HOUSE!
What is your opinion of this product?
I own 4 of the CS-4080Hz's but the CS-4000 is good for the 2 ohm loads and I can't say enough great things about their durability. Plenty of Watts to push the sound far out into the crowd. I have used them in 130 degree ambient temperatures and they stayed cool and at full power all day long. I have used the new version (Vintage Look) CS-4000 or CS-6000 but this model is worth the investment.