Originally Posted by lee730
They lyed ;). All in hopes in preventing themselves from looking like horses-asses. Still it didn't work. They just made themselves look worse :P.
Not entirely. It may not like a shorted output. While many modern op amps tend to have short circuit protection, these output FETs do not. Plugging in earphones probably doesn't create momentary shorts and cables tend to go open instead of short so we may not know the extent of durability yet. Perhaps there's not enough current on the rail to fail the output device over a few minutes but we don't know that.
Being down on Iriver for coming up with a circuit that has a 12 ohm output impedance is valid but calling them liars at this point in the process is a bit premature. You're likely fine with it gone but there may be a good reason for it being there. Try shorting the the output of a solid state home amplifier without protection circuit and see how that output transistor likes it. You'll take out a fuze or take out the amp.
As usual, what's actually happening here likely falls into a gray area. They are probably not lying but they may have been overly cautious. Either way, it wasn't a great design choice.
I think we should probably stop calling them liars and applying ulterior motives to their comments whether we agree or not.
I think many of the comments on headfi a bit strong. While I'm at it, I also hate technobable taking over almost every thread. Knowing something is not a bad thing but projecting that limited knowledge to something is too much. The guy who made the device is the smarter one or we'd be talking about what you made instead. Doesn't mean it's perfect as we're properly discussing here but the resistor wasn't just thrown in there by mistake, the Tera and Anv 3 can sound good and there's more to earphones than freq. response. LOL
Edited by goodvibes - 1/11/13 at 9:43am