Sorry, didn't mean to slander. I have the voyager myself and it's a proper little amp, minus the contour-switch for me (doesn't bode well with anything but sub-par earbuds, from what I've tried). As you said it makes everything "zingy" and sound distorted...
The reason I asked was because I see portable amps, at least when drawing a conclusion from the ones I've tried, as something that's not necessarily optimal for the signal. Nearly all phones that draw sufficient power from my ipod classic's headphone out with full volume, sound better that way. Of course if the phone's power hungry it needs an amp, but I'd not use it had I the chance. My current K272's need a bit more power so I'm using the voyager. Every portable amp seems to, I dunno, soften the transients a bit which makes some more complex music more difficult to follow. Not drastically though.
So that's why I asked whether you hear the Voyager as a bottle neck or an improvement for the Z1000s over your already excellent Sony portable player, which has to my understanding, as many other sony players, including two I've tried, good power reserves.
Interesting though. I will have to take your comments with a grain of salt. Contrary to the popular belief and preferences of head-fi members, I've come to see "anemic" as a good thing perhaps. I don't mind slam and coloration, but they're merely secondary bonuses to what should be, by premise, accurate music reproduction. It's impossible to tell from what people describe here as to whether something really is the way they hear it is, so I reserve judgment and try to grasp all the adjectives that refer to something that I consider "accurate". Still, I have to hear it first before I can actually say anything
Anyway, thanks for your comments.