Here are two of the most common modifications:
1./ Inside the planar base unit are the crossovers which have among other parts four high value electrolytic 100 V.N.P. caps, replacing these with the same value polypropylene caps but 200 to 250 volt rating will greatly improve the transparency and control, this is not really a modification of the circuit, just replacing the weakest (see "cost cutting") part of the crossover. The sound gets so much cleaner and delicate when called for, it is just amazing.
2./ You can remove the diodes in the speakers, Please be careful with this mod as it will defeat the protection circuitry and if you put more than 300 watts into the planars, you will damage the drivers (which are not easily replaced). I sometimes listen at high volume and did not do this mod. It is stated to be as much of an improvement as the first mod.
Have fun.
1./ Inside the planar base unit are the crossovers which have among other parts four high value electrolytic 100 V.N.P. caps, replacing these with the same value polypropylene caps but 200 to 250 volt rating will greatly improve the transparency and control, this is not really a modification of the circuit, just replacing the weakest (see "cost cutting") part of the crossover. The sound gets so much cleaner and delicate when called for, it is just amazing.
2./ You can remove the diodes in the speakers, Please be careful with this mod as it will defeat the protection circuitry and if you put more than 300 watts into the planars, you will damage the drivers (which are not easily replaced). I sometimes listen at high volume and did not do this mod. It is stated to be as much of an improvement as the first mod.
Have fun.