Allright. checked my power supply. its 1,5A.  
ill see if i can find another one.  
 
it outputs 12.26 volts.  
its one of those that you can adjust the voltage.  
will it help if i set it to 9v? 
does the synth need 12v if i use 6582a? 
 
the pcb gets really hot say 5cm around the heatsink area. 
 
 
btw, it sounds really really good! better than i had imagined!