Should I eliminate my preamp?

That is real possible. Thanks

I have two different Stax Electrostatic headphone systems.  My Stax SRD7SB/Lambda system is driven directly by my Rega Osiris integrated using an OPPO 205 by a half meter pair of MG Audio Design ballanced interconnects.  I have also added a one foot pair of MG Audio Design speaker wires between the Rega Osiris and the connecting wires of the Stax SDR7SB box for added fidelity.  My other Stax system is an SMR1-MKII/Lambda hooked up by again MG Audio Desgn single ended interconnects to the record out single ended outputs of my Audio Research LS 27 preamp.  Bothe systems, even though the Stax units are all about 35 years old but I have a sound reproduction from both of them can compete favoribly with much of these current top end regular headphone based systems.  Of course if I had the latest top of the line Stax headphone system and could run them into my LS27 ballanced it would be another story.  Oh yes, I use an OPPO 105 for my Audio Research LS27 system, which I use on my Martin/Logan speaker system.  The Audio Research/Stax SMR1-MKII total tube headphone system verses the complete solid based Rega Orisis.Stax SRD7SB systems both have different pluses and minuses>  Overall I prefer solid state 160 watts per channel Stax/Rega sytem for rock and roll, with the tube based Audio Research/tube based Stax system for everything else.  

I do have a question regarding passives . The pot used in the SM Pro Nano patch I use I assume costs a few bucks . Would say a Alps volume pot have a different sound ? I would assume all passives should have a similar sound . Is there a way to alter the sound with a passive be it with different interconnects or like I mentioned different brands of pots?

@maplegrovemusic

The interconnect cable is going to make a bigger difference than the pot that is used. However, as the value of the pot used is increased, its quality becomes more audible. If using a 10K pot, the ALPs will work fine. You might want to run a nicer part if using a 100K part.

If your source is solid state, 10K is probably a safe value. If using tubes, check with the manufacturer, but often 50K will do the job.

Elf1: "Most" balanced outputs almost always double the output voltage.  This is a good thing. Eliminating your preamp, if the preamp is in good internal condition, will sometimes make the final sound leaner and thinner. I would invest in a comparable preamp with balanced connectors. I think u will hear an improvement in your sound, i.e., a fuller more gutsy  sound,  while having more diversification at the same time. 

Just to update my own experimentation...I found happiness with an ARC REF 3 linestage, but only after I replaced the tubes with a spare set of new Sovteks that came with it.  The existing tubes were well within their life-cycle, but I did noticed it had the SED Winged C 6550 in the power supply, and there has been some reporting that the original ARC Sovtek 6550 sounds better, so maybe that was the difference.  I notice some good prices on Ref 3's, so I'm passing on my experience.

It was an educational process.  I came to realize how important words are to me, and I get deep joy in hearing the nuance in how an artist delivers the words.  That was the attribute that was so hard to find in swapping equipment, and what was lost in my specific instance when using DAC-direct or the solid state linestage that I tried.

Someone like Joni Mitchell can sound exceeding pure on many systems, but I can now hear how flawed she is, which let's me rejoice in her brilliance and humanness.  Of course, someone like Dylan can be endlessly appreciated in his voicing, inflection and phrasing, and my audiophile satisfaction is directly related to the degree to which it is revealed as a human voice in the room.

So the hunt for what a linestage can do was rewarding and recommended.

Cheers!