Agree with you 100%. The "sss" comes from vocals that sings/says any word that starts or ends with an "s".
EQ is also a last resort for me, thus i chose to ignore those certain songs. When the volume is lower, the squeal is no longer fatiguing.
Glad the new cable is working out for you, just be careful about the heat of the op-amps.
Thanks for the advice.
Yes, I will have an eye on the temperature. So far I can tell, the opamps are very warm but I think thats still in range. However, the coil is hot. The case is just about warm though. nothing to fear just yet I guess.