Great buyer, good communication, prompt payment, no problems, thanks!

Great buyer, good communication, no problems, thanks for a pleasant transaction!

Free (buyer pays shipping from Canada and any taxes, duty etc.) - a Firestone Audio Spitfire DAC and Cute Beyond amp. These were pretty neat entry/mid-level components in like 2009, when I bought them! The DAC has optical and coax inputs (no USB) and analog coax L/R outs, the amp has analog coax...

For sale my old iBasso DX200. I used this for a while, then the battery died and I got an LG quad DAC phone to use while waiting for a new battery; turns out the phone is good enough for me so I never really used this again after swapping the battery. Also includes an AMP3 (balanced output)...

"I have some batteries that are 10 years old but leave them stored at around 80% (a guess on % but it works) and I don't just keep something on charge all the time as I have found it shortens the battery life." Yeah, I know this is generally true but don't usually do it because it's just too...

Thanks! Is keeping it plugged in permanently a problem or are the batteries just known to die like this? I haven't had cellphone batteries swell on me when dying before, they just sort of...stop holding a charge, gradually.

Hey folks! So I've been very happy with my DX200 since I bought it...except that I just popped it out of the case to eject the SD card, and it did this: I don't think that's meant to happen, right? :) I've used it almost exclusively as a desktop player, it's plugged into the charger pretty...

From the specs it looks like it ought to be able to drive it fine (in 'low power' mode it can put 1.7v into any load from 8ohms up, which is more than enough for the AFCs, and its output impedance is <1 ohm), dunno about subjective impressions.

Huh, crazy. Has anyone measured it to see how much power it can actually put out at 16 and 13 ohms? It just seems like such a massive dropoff. (Note there's a measurement-based review of the Fulla 2 on a site which is...not exactly popular around here which makes it look like the Fulla 2 has a...

Basically, yes, but it's worth bearing in mind that this *alone* isn't a problem. Some headphones need more juice than others. If your amp can provide enough juice to make them play as loud as you like, without audible problems, it really doesn't matter what number or dial position the volume...

That sounds pretty crazy, if it somehow dropped off that much in power between 16 and 13 ohms - as we figured out the AFCs need way less than 550mW...since bearFNF isn't having the same problem maybe you just got a bad unit or something? I dunno.

Well, it makes things simpler :p If you're dealing with headphones where it's *not* flat, I think - per nwavguy again - the conservative thing to do is base your calculations off the *highest* measured impedance. So e.g. for a pair of HD800s, you'd wanna base your calculations off the peak...

fwiw, 16 and 13 are sufficiently close that I'd just use the number with a bit of padding...so long as the spec says it outputs a bit more power than you need at 16ohm you're almost certainly gonna be fine :). edit: sorry for all the edits, it's late and I was misremembering / mixing up some...

Sorry, just to link my reply back to your question a bit better: if the only spec the manufacturer gives is power into a single impedance, they're not really telling the whole story. They're giving you the data for *a single point* on a power vs. impedance graph; you can't 100% reliably...

That table's basically 'after impedance'. Whatever the impedance of the headphones, the amp needs to be able to output the amount of power shown in the table *into that impedance* in order to drive the headphones to the volume shown in the table. So, since the impedance of the AFCs is 13 ohms...