Class D for a Tube Lover

Ditch the amps you have and just get a PS Audio Sprout100 or a vintage Fisher 500-C with the budget you’ve got.  Will blow away any preamp you can get for your current amps.  

I love my Lyngdorf what was chosen in side-by-side comparisons against both LTA tube amps and a couple of class A and AB amps. I couldn't believe it was the best of the lot, but it absolutely was. I have the TDAI-2170. And another advantage is, you don't need an external DAC so you can save a ton of money on that front too. My analog inputs to it include a Feickert turntable with a whestTWO.2 preamp feed to the analog inputs of the 2170. The analog inputs do not sound "digital" at all. Closest thing I've found that acts like a wire with gain. Seems to add or subtract noting from anything you feed it.

Following up on my new(used) NAD M32. So far, it betters my last DAC/amp combo, the PS Audio DSD DAC + M700 monos. It does so many things right (insert a long string of audiophile descriptors here) and very few things wrong - in fact, nothing to my ears, yet. It is not *warm* but I agree with JA in Stereophile, "[...]what emerged as a consistent signature was a clean, clear quality of sound that stepped out of the music’s way[...]" and "Highly recommended." Purchased for $2450 used, and SafeandSound (a NAD authorized dealer) sometimes has refurbished ones available.

I will be another to recommend the obvious: tubed input stage, Class D output. Rogue and PS Audio do it, and I’m sure some others in what seems to be a growing trend. Or a Class A input, Class D output as an option. Just FYI, I bought the Musical Fidelity amp mentioned earlier and found it brighter than the Class D Teac A-H01 it was supposed to replace (tho the MF had very energetic sound, a nice amp). Just remember that your ears and preferences are yours alone, so maybe get some ideas from others and find the one that suits you. 

I do not have a great frame of reference for this but I added my new D-Sonic amp to my RAAL SR1a headphone system yesterday. The system is composed of the following gear, AudioMirror Tubadour III SE tube DAC | Benchmark HPA4 preamp | D-Sonic m3a-800s.

https://www.d-sonic.com/product/m3a-800s-stereo-amplifier/

I do not plan on using the D-Sonic on my floor standers since I do not have speaker wire that is long enough for a stereo amp (need monos).

However, with the SR1a, which is something that needs taming on the top end. The D-Sonic performed way better than my reference Benchmark AHB2 amp with the SR1a. If 100/100 means 0 fatigue, the AHB2 had 50/100 in the fatigue factor with the gear mentioned above, the D-Sonic was about 90/100. I am very impressed by this amp.

The D-Sonic is definitely a little warmer than the AHB2 which is what I wanted. The power and detail retrieval were exemplary, especially the power provided to the SR1a. On some albums with prominent percussion I thought the sound was more powerful than I have ever heard before on these albums (Signals and Distant Early Warning by RUSH)

For the SR1a system, I will be replacing the HPA4 with the warmer yet CODA 07x preamp and I think that will be the winning combo. The Benchmark gear stays with the floor stander, no fatigue with that speaker and the Benchmark.