Doepfer

is it possible that i broke my sennheiser hd280 (64 ohm) headphones by listening to doepfer 
or formant modulars? the left speaker stopped working, and i only used it w/ my m-box and  directly into doepfer/formant modules.

+

can i speed up a146 lfo2? i think it's a little slower than a145 lfo 1, it sounds a bit lower in 
the "high" position too.

thanks, floris