I was trying out my long-loved Larocco PRII today with my HD800.....something I haven't done in many many months. In my opinion, this particular headphone meshes really well with this amp. I've heard the HD800 on my main amp TTVJ Millett 307A (balanced and se) and I've had the pleasure of hearing the HD800 on the RSA B52 in my home balanced and SE. In my opinion, the HD800 sounds better on the Larocco. It is warmer and fuller and the amp has tailorable bass which can really bring out the subwoofer qualities. For classical music, I still think the 307a excels with this headphone, but for jazz and rock I prefer this 500 dollar portable amp even in single ended which is my only option with that amp.
The RSA B52 was possibly better than the Larocco, I don't have them side by side to compare, I recall preferring the synergy of the HD800 with the B52 over the 307a. For well recorded acoustic music, the 307a is unchallenged from what I heard.
If this interests you, the amp is no longer made but the same designer released the Lisa III which is supposedly better than the Larocco PRII.















