My cj still gets to hot

Greetings audiophiles I posted a few weeks ago about my cj 2500 running to hot. I appreciated everyones feed back. Once again the system is a cj 2500 amp with a cj pfr pre amp running magnepan 3.5's with stock crossover boxs. The system sounds perfect but my amp runs to hot ( almost to hot to touch heat sinks). I called cj they told me to try changing the 5watt 100 ohm reference resistor to a 5watt 47 ohm reference resisitor in the pre amp. I did,sounds good, still runs hot! I may have to pack her up & send her to cj, but if anyone has any other suggestions, they would be most welcome! Thanks Kyle