Re; Dynamics, Class D vs tubes…

For those that wonder the input impedance is 100K, so should play nice with the Shindo.

. drrsutliff, & russ69, …thank you.

Bill Stevenson,  Thank for your experiment and conclusion.  

West Coast Audiophile,  Enjoy!  I have given the specs of my speakers, the class D Amps I plan to audition are the new X mono blocks from Peachtree.  
Rounding out the field…Shindo Aurieges pre, Quicksilver V4 monos, KEF Reference 1 meta, Basis 1400 TT w/ Vector V4 arm + Benz Ruby OA low output with step up. ICs are Shindo, Spk cabling The Chord Company.  Vinshine Tia Hang.  
Please go ahead impress me now with your answer since you have my equipment list.

d/s

mark200mph, very nice preamp!  I’ve been a fan of VTL for a long time. Thank you for the advice.  As for me this is just an experiment to see if I can better match up my recently purchased speakers to a better option, more powerful amp and still have my “tube cake” and if it too?  These newest X series monos from Peachtree use NCore X 500.  With the impedance of 100k they should at least be able to mate well but as for a better tube alternative to my Qsilver v4 monos, we will have to see or actually hear it.  I know they will sound more dynamic but at what musical cost?  Thanks for the alternatives you suggest. 
 

d/s

To answer some of the questions above.  The speaker choice was of one of consideration of space as we moved into a new home and I lost my audio room.  I’ve had these V4s for a long time and the Shindo pre combo was a match made in heaven running my Eminent Technology LFT8b panel speakers.  God I miss those!  But moving I had to make do with a great room and a BDI TV audio console that housed all my gear but hides the beauty of the gear, all with speakers that as she put it were not an “eye sore”. LOL. So looking into monitors and coming off satisfaction from a secondary system, Peachtree Nova300 into KEF LS50s, I went for the Reference 1 Meta.  The only thing lacking is a tight base impact and maybe some high extension.  The speakers are capable but my tube gear is midrange magic focused with my KT-88s.  Lows and highs are good but not as good as can be had from the KEFs.  So, just thought if I could have my cake and eat it too?  Thanks everyone for the suggestions.  I know the answer is try out on loan new amplification but it needs to be at least 100k input impedance to have a chance. 

Thanks Ralph. 👍

So amp typology for the most part isn’t going to matter much?  Tubes vs solid state is closer than ever but still obviously not identical delivering music.  I guess I’m just looking for a better full range match for my current speaker choice.  While still keeping the equipment with the least amount of change.  I tried the KT150s for a little more bottom end , approved by Mike Sanders, but didn’t like the frequency response.   Might just have to stop here and let sleeping dogs lie.  

Not to forget, with a tube pre amp one would need a solid state amp with 100k input impedance to give that dull range .  Any suggestions, lower than a $33,000 Rei? 

It’s a Shindo Aurieges, this is how Stereophile measured it…

The output impedance at 20kHz was very low, at 23 ohms. It rose to 139 ohms at 1kHz, which is still low, but at 100Hz it measured a very high 3700 ohms. It rose even further as the frequency dropped, to 11k ohms at 50Hz and 16.5k ohms at 20Hz. I assume that this drastic rise in impedance is due to the Aurieges Equalizer Amplifier’s output being taken from the tubes’ plates via a coupling capacitor. With line preamplifiers having an input impedance of less than 100k ohms, this increasing output impedance at low frequencies will roll off the bass.

On the test bench, Shindo Laboratory's Aurieges Equalizer Amplifier produced mixed results. The very low levels of distortion and extraordinarily high overload margins must be set against its nonflat RIAA response, its high level of flicker noise, and its high output impedance at low frequencies, which will make system optimization tricky.—John Atkinson