l own one of these phono pre-amps ( and was in the PFM thread and have to admit was not in need of another phono pre- amp) after a loan period was very surprised at the sound quality of this unit- it does not have one as far as l can tell, it has plenty of gain, highly musical and pure as the driven snow.
I have a megabucks valve phono pre and the RSL in many ways sounds better at a fraction of the cost to the point you would not know if this was a valve or SS unit.
l am a very happy punter indeed- this is an amazing sounding phono stage at any price.
I use it with a heavily modified Michell Gyrodec SE/AN Arm 3v2/ Hana ML.