catman, that db drive 2000.1 didnt have big fins and when driven .35ohms daily it would get pretty warm. tim waiting on parts still to fix that amp.
i talking fins like the linear amps, old rf punch,old soundstream,ads plate amps. a heatsink cant wick the heat away without the fins for cooling. they use the mass from the big alum block. look at all the zenon amps. have a team mate wanting to have a amp line with me and been looking at buildhouses most big class d amps have ***** for cooling.
let me ask this question, how many of ur 1500rms plus class D amps have a internal fan? would they need a fan if they used a real heatsink thus increasing the cooling area by 4-8x what they have now,hmmm...