Thank you for all the suggestions. I tried few on/off: will try a couple of more prolonged power-cycle, disconnectiong power for up to 1 day. As for update drivers: mmm... Windows 10 should support Geek Pulse natively. I had drivers for Windows 7, never installed a driver for windows 10...

My Geek Pulse has suddenly stopped being recognized by Windows10 (USB) and also doesn't play from the TOSLINK input. It has been there for years, working from USB + TOSLINK without a glitch and now just died... Screen is ok, it is responsive to the knob, but firmware appears to be 0.0 anything I...

Anyone experiencing dropouts?   I have dropouts with my Pulse (February, Firmware 2/2.1) sources: Logitech Touch, Windows+foobar (both are dropout free using other DACs as FiiO X3, ODAC, etc) files: FLAC 16/44.1, FLAC 24/96, MP3 320 connections: I've been using both USB and Toslink  ...

I've had the X3 it's four months now, I've been using it with Etymotics 4ER-S custom fit. It has replaced my previous on-the-go gear: S:flo2+Leckerton UHA-4   I listen to FLAC (24/96, 24/88.2, 16/44.1), MP3, and AAC, stored on a SanDisk SDXC 64GB.   I've appreciated all firmware upgrades...

has anyone compared the D2 with Teac UD-501 as PCM DAC and headphone amp?

USB DAC support would be an amazing feature! X3 is going to be a killer product.   I start dreaming about it...   If also usable with smartphone/Android/iPad... oh boy!

Just got my X3, very pleased so far.   Is there a consensus about which 64GB micro SD works without problems? I am considering Samsung Micro SDXC SanDisk Ultra Micro SDXC Transcend TS64GUSDU1 MicroSDHC Class10 U1   I know I will have to format them as FAT32   I would use...

be sure to put it in a fire-safe place, in order for the flames not to propagate   :-)

ODAC/O2

I would love a shootout between the following DACs (quickly found web prices listed)     Anedio D2 Grace Designs m903 NAD M51 Mytek Stereo 192-DSD Benchmark DAC-2   The last 3 are DSD enabled, which is relevant for me. All but the NAD should be decent amp for my HD650.  ...

I'm very happy with my O2+ODAC

The indication that it will have gapless playback has really put this on the top of my wish list. Line out, digital out, great codec coverage, and gapless playback: bingo   If sound quality is up to S:flo2, this is gonna be my reference portable DAP

I've just ordered ODAC + O2 for my HD650.   The alternative I've been considering was UHA-6S MKII, since it should be better of the older UHA-4 which I happily use for my portable setup and has no problem driving the HD650 to decent levels

for that budget ODAC + O2 are probably without real competitors.    and buy from: http://epiphany-acoustics.co.uk/our-products/heaphone-amplifiers/ehp-o2d-miniature-desktop-headphone-amplifier-with-usb-dac/ or http://www.headnhifi.com/o2-odac-combo   I've just ordered mine for my HD650

Quote: I've edited the original post to make it clearer