Yeah, I don't expect it to fundamentally change the SE846's character. I use a HiFi-M8 with the impedance set to 1 ohm, which, like you say, helps brighten the sound signature. I love the bass and mids of the SE846. And while the lack of treble means I tend to use other 'phones for close listening, it's still an addictive and non-fatiguing sound to me, and I use the Shures a lot. But I'm always looking to coax a little bit more treble from them.