Hello,
I have owned both of these amps. I still have 2 HCA-3500's in my possesion and probably will never sell them. I liked the 3500 more due to the power difference, the dual mono construction, and the fact that this is the amp the JC1's were designed from. I think sonically they are both pretty close, but the 3500 does have a bit more low-end control. Good Luck, Matt.
I have owned both of these amps. I still have 2 HCA-3500's in my possesion and probably will never sell them. I liked the 3500 more due to the power difference, the dual mono construction, and the fact that this is the amp the JC1's were designed from. I think sonically they are both pretty close, but the 3500 does have a bit more low-end control. Good Luck, Matt.