Any expert 6SN7 help me identify what this is? The seller seemed reliable and told me they were Sylvania but there were no labels. I couldn't find any information on unbranded Sylvania?   http://imgur.com/a/KdtuG

I have a Centrance Dac/Amp and also a Bravo V2 hybrid amp.    Can I use the following connection?   PC -> Centrace DAC/AMP -> Bravo V2 -> Headphones?   How would the volume control be? (For example, do I max the dac/amp volume and control it with Bravo v2 amp?)   Kind of confused how 2...

what are some good sources with USB connectivity to be used with sensitive IEMs? 

I plan to use iphone 4 as my source and UM miracle.   Would I benefit from Pico DAC/amp or should I just get an amp? like Ibasso, RSA, or XM?

hi I'm interested in unique melody miracle, I was wondering if it was worth the money if I plan to use just straight out of my iPhone 4 jack without any Dac/amp. I don't feel like carrying around that big mass along with my phone...

PC -> gamma 2 (usb) -> Grado   I wish gamma 2 had a volume knob or something, I can only control the volume through foobar and not even with the windows volume control.  Should I use spdif from my crappy onboard motherboard? Seems USB only does 16/44.1

http://www.nuforce.com/hp/products/iconhd/index.php   From the website it seems that it only has analog output (RCA?) for subwoofer. I was trying to see if it could serve as a DAC for STAX amp system.   Thanks

Hello,   I tried searching but haven't found a good answer.   I was wondering how the DAC component of Icon HD compared to uDAC2. Is it worth upgrading? Would I see an immediate improvement with only a grado 60? (I hope to try Senn hd 650 someday..hopefully not too soon)     HD...

I got uDAC-2 today and started A/Bing with my onboard PC using Grado sr60.   The bass was definitely better, alot clearer, but other than that..I didn't hear much difference.   Did I expect too much??   btw my music is half flac, half 320kbps.  

Hello, I am a complete newbie.   I love my grado sr60i but I'm already looking at 325is...   anyways my question is   I mainly listen to 320 or 250~ kbps mp3 files   So would 325i improve the sound quality of this mp3 file?   also I'm just using my cowon d2 or onboard...

Hello   I am a proud owner of grado sr60i and I love the sound!   I was looking on amazon however today, and it seemed there are 2 different designs for Sr60i? I bought the one that said "Grado Sr60i (ear-cup)" but there is also "Grado Sr60i (padded)" design which looks slimmer? is...