It tends to go against better judgement to blindly send anyone $550 and not know what they are doing. The many positive posts on TRL mods are leaning me towards going against "better judgement".
No they won't tell you what they do specifically. I can tell you what to expect that seems to be their "signature" changes after several modded digital and amps from them.
1) Lower noise floor. It is startling what they do here on any unit. You don't realize how noisy something was until the noise is removed.
2) Removal of electronic and digital glare or hash; hence people feel that they get units to approach an analog type sound.
3) Premium on detail
4) Premium on neutrality- no artificial lushness that gets passed off for warmth when it actually smothers detail
5) Bass extension
I would recommend them, but there certainly many viable options. The AH Tjoeb istelf is an already modded Marantz, so I one cannot be sure what the ceiling is for that unit.
I do know they regularly work on units that have already been modded by other well known modders.
Good luck!
