For the K701 that would be a big AYE AYE. Using the headband spring was a monumentally stupid idea, of course IMO. I wouldn't say this is necessarily true for every headphone however.
Before you buy another amp, if you have not already recabled them to a dual entry configuration, STOP: DO NOT PASS GO, get them recabled and then decide if you need a new amp.
Well it is not a universal. Peter is now five and we have managed to avoid both the Wiggles and Barney. I can live with Little Einsteins and the Imagination Movers.
I have found the same thing with the crappy recordings. I have also found that I almost universally prefer upsampling frequencies 176.4>88.2>96>192. Somehow seems a little weird to me.