Audio Mirror Tubadour III vs IV

I currently own the III SE and Vlad is building me a IV to test run.  I kept having a weird clicking noise with anything coming over USB.  Hopefully his USB reclocker and new transformer fixes my glitch.

Just got the tubadour IV in today and gave it a quick 2 hour work out. I would say the differences between the 3se and 4 are: Clarity better on 4IV: Like a thin veil was lifted. Detail better on IV: Im hearing the details better and more pronounced. Less digital glare on the IV. Base texture and weight definitely better on IV. Darker background on IV. This is only after 2/3 hours so we will see if it changes and gets better or worse. All in all, music sounds right tonally and temporally with exciting bass and seductive midrange. Kind

I live in Ohio around Cleveland if anyone wants a demo.

This is using USB from a laptop using Audirvana.  I will say that on the III SE I had an annoying clicking (jitter maybe or loud power supply?) sound whenever I used the USB input.  I cannot tell if it's the USB reclocker or the new transformer output that is making the improvements and removed the clicking sound.  So far so good, I still have a couple more days of burn in before I'm completely sold but noticable differences are audible.

I agree with Mr. mdrone.  Acoustic and classical sounds the best.  The AM4 has really good bass so it also thumps and amazing for rap or electronic music.  Sometimes with older rock I will feel like it's not separating things as well as other Dacs (Bring Me To Life - Evanescence, grunge rock, heavy electric guitar songs).  I'm not sure if it's the recording, the electric guitar overbearing the rest of the music, or if it's an R2R thing. So I would say this Dac is ideal for acoustic/classical/rap/electronica/pop but not the absolute best for 90s grunge rock.