Here's some pictures of the inside for those of you wanting more component level info. https://imgur.com/a/YZHci Same PSU as the HDVD 800/ HDVA 600, which uses Ltec LVG caps, meh...

I have foton gold grids 6n6p. They sound wonderful, but they are really a minor upgrade, the stock power tubes are quite good. Haven't done any A/B comparisons since I got them though, so they may be significantly better, but I'm airing on the side of slightly better.

Just purchased this one, since my stock cable has been runover by my chair a couple too many times... http://www.ebay.com/itm/121460098827

I am looking to get either an uberfrost or a Meridian Director. I wish I could get some comparisons, but all I know is that they are both very very good DACs on their own, I can get both for the same price so that's not a factor. I really like the design of Meridian products, much more than...

Yep they are stock. When I can justify the upgrade I'm going to roll to Siemens CCAs or Phillips SQ E88CCs 

Yes they are!  

eBay http://www.ebay.com/itm/111386804844?_trksid=p2059210.m2749.l2649&ssPageName=STRK%3AMEBIDX%3AIT   The seller is great, although his listings are a bit pricey compared to others. There;s no channel imbalance or issues with matching, he even provides test data and lets you chose the pair...

Get some Foton 6N6Ps, I got '60s but I hear some people prefer the '70s Novosibirsk tubes. I found the Foton tubes I got to add a little more separation and distance; with some more time on the tubes I think that I like them a bit more than the stock ones.    It cost me about 50 dollars for...

Own a Valhalla 2 and HD650. Awesome combo, very neutral sounding amp that worked great with SE846s as well as my Senns.

Right out of the packaging these '60s Foton tubes sound awesome. Definitely a little more open and distant sounding. Not sure if I like the distance this adds but I really like the openness it adds (this is a very minor thing to me, however); I'm going to wait until these puppies get some hours...

I have heard of QC issues, and general cheapness of feel, the main reason I will be avoiding the 560 for a little bit.

I have a pair of Martin Logan Summit Xs, Motif center, Depth I, and Mythos STS rears in my HT. I still find the HD650 plenty enjoyable, as much as that system? absolutely not, but I have no reason to upgrade past the HD650 ATM. I feel that the HD650s are something you learn to love because they...

Snatch these up, the seller has also sold a 6n6p-dr for 90 dollars yesterday (JUST ONE). http://www.ebay.com/itm/2-pcs-BOX-PLATE-NOS-6N6P-Gold-grid-ECC99-E182CC-6N30P-Foton-early-1960s-tubes-/121432444748?pt=Vintage_Electronics_R2&hash=item1c45f00f4c&autorefresh=true   If I had not purchased...

The Valhalla 2 is awesome with these cans! I find that poor recordings to sound bad, muddy and congested. I.e. metal recordings are usually pretty poor on places like youtube, but listening to some of my roommates CDs they sound much much better. Is the HD650 the best headphone for metal and...

Purchased some 1965 Foton 6n6p tubes off of eBay. They'll arrive towards the end of the month, it's too long of a wait! :'(   I'll let you know how they sound when I finally get them.