This is the NuTube B-1 kit from DIY Audio Store.

I have built many of these for friends and family over the years.

This was my personal unit and is a premium build with many upgrades.

Upgrades include:

SMPS DC Filter

Nichicon FG for the power capacitors.

Jantzen Z-Superior capacitors in the signal path.

After building many of these and trying many different signal capacitors.  

I have found the Z-superior to work the best overall for soundstage, price, and fitment.

Please ask all questions prior to purchase.

Shipping will be to the continental united states only.

Thank you