I might as well toss my $.02 in. What I have read from most forums has been positive as it should. I have been listening to tube gear and building tube amps, pre-amps and tube-digital interfaces for a heck of a lot of years.
I bought one of these on a whim - it looked neat and was primarily somthing that NOBODY is mentioning. The LD2 is a Directly Heated Triode amp for less money than a pair of 2A3's. DHT's have a magic that can't be measured. Not big on power usually but Sweet doesn't come close to describing them.
Sword-Yang has put together a simple and rather elegant design that shows a strong understanding of tubes. And - does not try to over complicate what should be left simple. Once the amp breaks in, and that takes a while. It is spooky how well this is balanced. Nothing is spectular, nothing glares, No need to waste a lot of adjectives on this, it's just musical. You are listening to music, not an amp.
For those of you who are unfamilier with tubes they are high impedance circuits and cables interact. What may be your favorite interconnect with solid state might not be the best with tube. You don't need to spend a ton of money on wire. Actually I think too many people get robbed trying to make solid state sound good by buying wire
. Use stuff you set aside before, borrow cables. I make my own using Mogami Nyglex 2534 quad. My favorite wire for most high impedance audio. Shield grounded on one end only. (source)
Before you do anything let this thing break in for a few weeks. It's gonna' change quite a bit. For the first Hundred hours I just plugged in a set of cheap 50 ohm phones and ran white noise through it unatended for 4 days. (Old FM tuners are great white noise generators with no antenna.)
If you are un-familier with DHT's do some searches, read a few tube forums.
This is one of the best bargains out there. I build most all of my gear and modify the heck out of what I don't build. I will do very little to this amp.
I intend to change 3 caps. That's it.