I have this preamp for some weeks and I find it really rev out the optical out its great because I just connect it to my sound card EWX 24/96 for two more input.
I buy on AudioFanzine is thanks to the ads and it is 220 euro casi nine.
the quality of the preamps is exepitionnel. the sound is warm and prcis is little to connect a guitar or bass direct and trs sound is good.
here I recommend to everyone this great preamps.