Selecting used Stax phone and amp


I hadn't listened to headphones in years, but I recently did a setup comprised of ethernet to microRendu, USB to Ayre Codex, stereo to Audeze LCD-X.  I'm impressed with the sound, but the Audeze phones seem heavy.  I'd like to try used Stax phones and amp at a reasonable cost, e.g., around $1500 for both.  Advice on models I might look for would be appreciated.  For example, it appears SR-L500 and SRM353X might fit my cost aim, but I know nothing about them.  The source will be Roon files.

Also don't know how a Stax amp might be used in a computer audio setup.  They don't appear to have USB input, not sure about a DAC.  Might it be balanced analog from the Codex to the Stax amp?

db 
Ag insider logo xs@2xdbphd
dbphd,

Today (9-24-20), there is a Stax amp (T1) and Lambda headphones available (not mine) here on Audiogon for $1,550. If you haven’t bought a pair yet, then these are for you! Take a look! The only thing the T-1 lacks are balanced inputs. That's available on the T-1S.
Best thing to do would be to contact STAX. I have contacted many manufacturers in the past...and they were able to help me make decisions or solve problems.