Thanks again to Almarg and others who have responded with very good and plentiful advice
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To Mensch, your last response makes good sense because I don't want to jump too fast buying a suitable and quality fully balanced or partly balanced pre-amp to accommodate BAT VK-200 amp.
As I mentioned before, I DON'T WANT to necessarily buy an outboard phono stage and headphone amp or box . That is two more cables and also more potential headaches .I realize that a separate phono stage like the Musical Surrounding Phonophemon II is an excellent choice because I owned one about 4 years ago. However, 75% of my listening is by CD, and the rest LP's. I could easily live with a Project RPM-3 table packaged with a Sumiko Blue Point 2 cartridge
The easiest solution might be to buy the new Rogue RP-1 pre-amp reviewed by Stereophile in the August 2016 issue . It has a MM/MC phone stage, an improved and higher gain headphone amp and a better remote with some additional features. I am sure other reviews will follow.
However, as I noted before, the Rogue RP-1 uses only RCA connectors. Nevertheless, it should provide a almost major step up in sound quality from the pre-amp stage of the Sphinx v.1. (I hope)
The question is ( and maybe I missed something that Almarg noted before)
1) do XLR to XLR IC's "insignificantly" reduce RF noise carried by RCA cables. resulting in blacker grounds and improved clarity and transparency?? 2) As Mensch noted, he acquired a "pair" of XLR to RCA interconnects through CablesOnline.com for less than $20.00 Several other members offered other brand name XLR cables or a combination of balanced to unbalanced IC's,
Almarg clarified about the potential loss of volume employing an XLR to RCA cable as offered by Mogami, and others However,I did not mention to Al, I operate the volume in the range between 12 o'clock to 2 o'clock.which may be greater than "upper 25% " of its range" as noted
. If MY volume setting IS NOT as Almarg commented. IN THE 25% UPPER RANGE. then it is not a significant issue. I do play it loud, but not head banger loud. Also, the potentiometer of Sphinx seems to gain well at about 12 o'clock high, but the remote, seems to step the volume up in 2 db increments, unlike the remote of Bel Canto Pre3. Its volume gain via its remote was more subtle and controllable.
The issue for me is:.... I don't want to crank the volume up to 3 or 4 o'clock high on either the Sphinx v.1 integrated or the new Rogue RP-1 pre-amp as a consequence of using XLR to RCA cables. If so, then I must search for a pre-amp that is either fully balanced or mixture of balanced and unbalanced connectors. I need to understand more about the volume range I am operating to make it loud to my satisfaction Thanks to all, Jim