Quote:   On my MAC system I'll sometimes have to switch the audio output to Compass2 manually in Audio Midi setup after reboot/unplugged the usb. But it always get detected as it always appears in Audio MIDI setup windows when connected and power on. Not sure if you are mean the same...

Wow! Thanks for sharing this. Learning a lot from it.

Quote: IMHO, I find the soundstage is very good. Deep and instruments well defined. I think music doesn't sounds too wide or narrow, just neutral. Another findings is that it is very picky on the recordings too. Bad recordings will sound bad especially on the treble while good one you will...

I'd upgraded the firmware chip to firmware no.3 and guess what?!? problem solved!!! It works well with my MAC without any drop/pop/tick now.     wizardknight, to answer your question regarding burn in, I did hear some improvement after about 80hours. Sounds seems to open up more with better...

Hi WizardKnight , I'm using it with Windows 7 now. So far I have not much problem in windows. I did encounter some drops in windows too after these few days of listening. However with a tweak of USB cable connection and sometimes reseting Compass2 or changing USB port  solves that.  ...

Quote: Hi Kingwa,   Foobar2000 only available for Windows OS. I find it work perfectly on Windows. The problem is only on my MAC OS. Changing USB port does not fix the problem for my case. Anyway, I'll try get a better USB cable and see how it goes. I hope Audio-gd will also look into...

Quote: Thanks for the info franmon83. Seems like 10.8.2 does have good improvement of 10.75 on this issue. I have about 1 drop every 3mins on both USB port...which is pretty annoying! I tried setting the output to 24bit and 16bit but still having some drop. I guess I'll just use another PC...

Quote: Hi franmon83,   I'd tried using Window 7 system with foobar player on the same laptop ie MacAir. It didn't have such problem. So I'm guessing it is firmware/OS related. May I know what Mac OS version you using? Mine is 10.75. According to KingWa, some user have no problem while...

Quote: To me the sound improvement compares to direct pairing with laptop n iPod/iphone is night and days for AKG Q701 Everything is improved! That said, AKG Q701 is known to be needing good amping to sound good. On the other hand my ATH-ES7 doesn't seems to get as much benefit from...

Quote: I am guessing it will automatically switch between Class depending on power requirement of your load (headphone) just like some Class A/AB amplifier does. Looking at the output power of Class A, that will also means it will be running Class A for most headphones in the market...IMHO ...

I have a Compass2 on order as well. Planning to use it on AKG Q701. Having read this post makes me worried about the synergy since bass shy DAC/AMP sounds like a BIG NO NO for Q701. Anyway too late for the worries, I'll wait to try it out.   I'd ask KingWa about the sound different between...