Pierre (shiva) and Frederic (superfred21) what do you say of this:
For Pierre, Abyss + AudioValve RKV mk3 is the best system ever listen (for him).
According to Pierre Paya (for Casques-Headphones), the mk3 (symetric) AudioValve RKV is a worthy successor to the legendary AudioValve RKV mk 2 (asymetric) and is one of the best and most powerful amplifiers for headphones ever built. http://www.audiovalve.info/rkv3/audiovalve%20rkv%20mark3.html and http://www.audiovalve.de/rkv/audiovalve%20rkv%20mark2.html
It is more powerful than the also legendary Eddie Current Balancing Act and could be one of its direct competitors (at same price) for use high-end with the Abyss.
There where I am getting, Pierre said that listening to the Abyss with the mk3 RKV is better than that of the Stax 009 with SRM 727. However the mk3 RKV uses a transformer in mode "transformer mode" for a < 100 Ohms load) (with his internal impedancer) to be properly used (in impedance) with the Abyss (of 46 Ohm of impedance). However this transformer (internal impedancer in the mk3 RKV) alters the quality of the audio signal (like any transformer).
Conversely, Stax 009 can be directly used on an RKV "in OTL mode" (no output transformer on the audio signal), with a gain of transparency and presence obvious compared to the classic mode using the Wee impedance transformers 1:50).(NB: the Wee is used only to generate the bias voltage 580 V DC on the 5th pin on the Stax headphones).
Edited by eric65 - 2/1/14 at 2:26am
In this specific operation of the RKV on the 009 with the mode direct "pure OTL", is it not impossible that the 009 return to top on the Abyss, at least for the quality of the medium and the treble (not for the bass) in terms of transparency and presence ? over the Abyss when it is used in the mode "transformer mode" (with impedancer) of the RKV (mk3 with the impedancer internal or mk2 with the external impedancer).