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Posts by TheGame21x

If you already have the combo and don't need RCA output or want it in a more convenient spot or something along those lines, I would imagine not. I'm glad I found that out though. Just saved myself some money.
So, had a learning experience regarding the O2 + ODAC last night.   For the longest time, I've been thinking of buying another ODAC to drive other headphone amplifiers because I bought the combo with the ODAC built in, thinking there was no way to output to another amplifier.   Come to find out last night after reading up on the combo at the JDS Labs website that the front line in jack performs double duty and works as a line in from an external source or a line out...
So I've got the MC5 in as a review unit and I'm comparing it to the E100 I got as a cart filler on Amazon and oh boy. I didn't know earbuds could sound this good. Quick impressions of the sounds of each.   E100: Open, airy with surprisingly strong and taut bass. A bit v-shaped in presentation with a fairly wide soundstage. Mids are thin but detailed and the high end is prominent and sparkly.   MC5: One word that immediately popped into my head as I listened to them for...
Yeah! Someone should definitely do that!
Degradation (at least audible degradation) probably won't happen on the first go. It's only after repeated conversions that quality audibly degrades.   And of course this is dependent on the type of conversion, eg. 320kbps MP3 to 128kbps and then back up and whatnot.
No kidding. I got mine (open box return) for $240.  Second best value I've gotten on headphones since the $220 HD 600s I scored a couple years back.
I use the HE-400 with an O2 and it's an excellent pairing.
I'm more interested in the measured DAC performance, tbh. I've got an overabundance of quality amps, but no real stand out DAC other than the ODAC built in to the O2 chassis (which means it can't output to another amp). I'm tempted to just get another ODAC or a Modi to fill my DAC needs but an all in one solution for under $100 with a nice preamp and a powerful amp on its own is one heck of a value proposition.
To me, the DT-990 seems like the HE-400's younger brother. They have similar bass and treble emphasis and slightly recessed mids. Ever since getting the HE-400, its been relegated to gaming duty because it's a stellar performer in that regard (and that's kinda what I bought them for) but it's an impressive music set too that would be my go to "fun" can because of that big bottom end had I not gotten the 400s.
I am far from an expert on the subject but as I understand it, the rule of thumb is that output impedance should be no more than 1/8th of the headphone impedance and ideally zero. So in the case of the 10 ohm output impedance of the Fiio E09K, you'd want to use a headphone with a minimum of 80 ohm impedance, otherwise the output will cause impedance swings that can alter the sound signature of the headphones plugged into it.
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