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Like I said earlier, the difference in sound is comparable to ABX'ing a creative Zen Vision M (line out) to the AOS (line out).
Have you tried the stereo crosstalk test in RMAA and found any differences between firmwares?
Yeah, Febs I am. Â I should Qualify last night's statement though. Â Truthfully, using a VERY transparent Amp and High End Cans, I played my reference tunes through both RB and AOS, one after another (admittedly, with a pause = reboot time). Â My new conclusions are: Â RB makes iPod sound more like ZVM - wider soundstage (and almost by extension, better imaging - to much to explain and I'd probably mess it up, so I won't go there); otherwise, the two sound the same. Â A proper analog for this scenario would be Grado sound vs. Sennheiser sound. Â Hope that helps.
I'm no engineer but these graphs look pretty the same and the tiny differences can be just statistically irrelevant so I would ask: how much are frequency response and dynamics just a question of hardware - quality of filters, circuits etc?
What other measures of sound output would one consider in assessing SQ?
If anyone is in the Toronto, Canada area and has a 5G ipod they want to loan me and/or come test with me, I'd be glad to ABX. Â As it stands right now, I don't have that kind of equipment. Â I'd love to try this option as well.
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