The Best Preamp is no Preamp?

Sound reinforcement systems don't have pre-speaker-amp "preamps" as a concept even.

Of course they do! The preamp is known as a 'mixer'.

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There are four functions a preamp provides:

1) provide input switching

2) provide volume control

3) provide any needed gain (tuners usually do not make enough output to drive a power amp directly; many make only 1 volt)

4) (and the least understood) control interconnect cables; prevent or reduce them from adding colorations due to cable construction (if you've ever auditioned cables and heard differences you know what I'm talking about).

If you use the balanced line system, you can reduce cable artifacts and should eliminate ground loops entirely. The balanced line system is intended to be low impedance which rules out passive systems. I tried this decades ago and found dramatic differences between cables that were eliminated when I used an active line stage that drove balanced cables properly (e.i. supports AES48, the balanced line standard).

There are a lot of debats on this but I just share my experience.  Shorter signal path is better. I am running straight from Dac (as Dac mode) to PA and the system sounds really well.  I maximize the volume on the source and adjust the volume on PA to reach the listening level.  I also found playing CD/SACD player straight into PA is better than going through Dac, even though the internal Dac inside the player is lesser than the external Dac I had.

The best preamp is no preamp only until you hear high quality active preamp

@sns 

While I don't disagree that active preamps can be very good, I think if a high quality passive doesn't beat it, your system is what's at fault. I have owned many "higher end" active preamps from CJ, ARC, deHavilland, Art Audio, Lamm, Audible Illusions, Cary, BAT, and the list goes on. But a TVC or LDR beat every one of them.

I think I have a good example of when a passive pre works.  100 dB speakers  PASS XA25 with 20dB of gain.  1.25V will run the amp at full power.  The lowest active preamp I could find was 5dB.  Even now with this passive setup at times I only need to turn it up to say 10AM.  An active will change the sound I know.  Are there active solutions for my setup?  I don't really want to mess with tube amps.  Tube preamps would sound OK but too much gain might make my volume very sensative?  I think.

@daledeee1 A lot depends on what type of passive you are using. All are not created equal.

Edit:

I just looked at your system. You are doing yourself a huge disservice if you don't at least listen to a couple of good tube amps on those speakers. I owned them in the past so I know of what I speak.