Best 6NS7 Preamp for a Pass Labs XA25 amp


Will need a remote.
No SCHITT Kit.
There must be a couple happy XA25 Amp owners out there?
gadios
Linear Tube Audio manufacture 3 magnificent preamps that can use 6N7. They are delivered with 12N7's but by moving a jumper on the pcb you can change the heater powersupply to 6 volt and then use the mores expensive but cool sounding 6N7 tubes. The MZ2 with our without your remote should be within your budget? www.lineartubeaudio.com
You're not going to find a better 6SN7 preamp than the SP14 from VTA.  You can buy it either as a kit, or preassembled and fully tested.  You can even get custom builds for a bit more cash.

Complete kit is $950
Fully assembled & tested is $1450

http://www.tubes4hifi.com/pre11.htm#SP14

The base SP14 looks pretty plain, but some of really don't care.    Don Sachs will do a custom build for you of this preamp.  Pricing will depend on just what you're asking for.   
@coachpoconnor   can you elaborate a bit on your Supratek as in upgrades ,  what it cost you,   how many inputs ,  how long have you had it and by chance if it needed service would your only option be to send to AU?  Have a remote and if not any info about the remote and if more functions are available for the remote?     I could simply email the builder I suppose although at this point in time would like to hear of others experience with Supratek. 

+1 on the Atma-sphere.  Surprised it hasn’t been mentioned yet.  I’m slumming it with an MP3 (kidding) but had tried the MP1 and was outstanding.  That’s what sold me instantly and went on a search for a MP3.  
Works great with my XA monos


You can't go wrong with a Supratek preamp. I have a Supratek Sauvignon (highly modded) mated with a FW SIT-3 amp and the pairing is wonderful!
The Supratek is the only component that I have not changed over the years. It's a keeper!