Yes, 8620's and I still use them today. I've had quite a few small headphone amps and they always seem to end up with a pair of 8610s or an 8620. I even had the older iBasso balanced amp and dac, 8620s ended up in there too.

So, I didn't read all 19 pages of this thread, mostly the because the opening of this thread seem more like a rant than anything or real value, but in reading what I have, it seems the HE-500 is very source sensitive.  I've had my HE-500s for several years and driven with a Headroom Ultra...

My current portable is an X3 1st gen, Leckerton UHA-6S.MII and Weston 4R.  Thinking up upgrading this year to the X5 3rd gen and some Campfire Andromeda IEMs.

Is there a US release date?

I new FiiO X5 3rd Gen has duel AK4490's.   http://www.fiio.net/en/products/65

I know, old post but I always get a chuckle when people claim digital is nothing but a bunch of ones and zeros.  It's not.  It's a bunch of pulses and the condition in which they arrive at their destination will make a difference in the reconstruction of the signal, including amplitude, timing...

Anyone know where to source a new battery?  Mine seems to have puckered.

Have you tried plugging it into your PC/MAC and see if you reformat it?

Looking forward to trying them out on my mountain bike adventures, wind noise can be an issue.  Currently still using my old SkullCandy Titans. 

Supporting!

The problem is, if  Windows does not recognize a file or filing format, it will assume it's corrupt.  I have a 2TB external hard drive I use for work that I know with 100% certainty, there are no issues but every time I plug it in, Windows always wants to scan it.  This can also arise when a...

Don't ever let Windows scan any removable media.  It's always a good idea to eject it before removal but last time I scanned a memory stick, Windows corrupted it to the point I had to reformat. 

I never tried the 4627-1Bs with my AKG702s or Grados but used the 8620 with them and didn't like that combo. 8620s work very well with Sen HD600 and HiFi Man HE500.

With the AKGs and Grados, you might try an OPA627. Both those headphones are very forward and the 627 my smooth things a bit.

With my old iBasso P4, I spent a lot of time swapping OPAs but I always seemed to settle back on the 8620.  I have been running the 8610's in my Leckerton but recently I ordered a set of 4627-1B from DigiKey and soldered them up.  Been using them for a bit over a week now and this morning I did...

So where do you buy this thing?  I found only one seller on the iFi list, Music Direct, but they have it listed for $499.  That seems excessive as I saw a listing for $189 but none in stock.

The 8610 and 8620 are the same OPA but the 8610 is a single and the 8620 is a duel. In reading on the Leckerton web site, the 8620 will give you more gain with low impedance headphones by running duel OPAs for each channel.  For me, I don't have a need in my Leckerton but I do run a single 8620...

I have gone back and forth between the X3 DAC and the Leckerton and 'I think' I prefer the Leckerton DAC. this comes from long listening to music I know well but it is not blind testing and I may be swayed by the coolness factor of my digital cable. :sunglasses: Ether way, I'm very happy with...

Yes. I use the digital out of my FiiO X3 and then drive a pair of Westone 4R's. Just made up a quick coax cable using Switchcraft right-angel connectors. Best sounding portable I have. Previously I was using an iBasso P4 with the line out of the X3.

Let me chime in here.  I've been doing telecommunications for 30+ years and nothing today in the digital age can compare to the quality of transmission back in the analog days.  Every circuit had three-tone-slope, Sig/Noise and c-notch noise run on a monthly monthly basis, with very tight...

Will you guys please stop!! About a year ago I sold my DB2/PB2 combo with a whole boatload of OPAs and buffers thinking I wouldn't miss it.  I was wrong, I was honorably wrong but right now I can't afford to replace it.  All this talk is making me want them back.  Where is that damn unsubscribe...

My X3 functions fine running ver 1.31 and does what I need it to do. It also really sounds great compared to other players. If FiiO comes out with a new, stable upgrade, great, but I can always fall back on the old load.  No regrets.

Did you try to hold the reset button for ten seconds or more?  Worked for me in the past when I thought I killed mine.