Lots of folks on here rave about the CA9, talking about the massive punchy sound. I only need about 800W or so (@4ohms bridged), and I'd like to not have such a boat anchor as the CA9. I notice the CA4 fits the power requirement, but it's the same size as the 2,000W CA9 (18" deep), and only 6 lbs lighter. Anyone know if the Carvin HD900 /HD1800 power amps use the same design of power section as the B1500 that's so popular here? The HD models claim to have massive toroid supplies, and they're both a lot smaller and lighter than the CA4... but what do they lose along with the size and weight? So: Anyone here with hands-on experience with either of these units care to give their opinion? Any other suggestions for a mighty-sounding 800 to 1,000W big-iron type (not switching) power amp that's more compact than the CA4? Thanx! Edit: I've seen posts from a couple of guys here who own and like the HD900, but it would be awesome to specifically hear more about how those amps compare to big-name "lead sleds" like the Crest.