Audio Mirror Tubadour III vs IV

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

How does the Audio Mirror handle more complex and dynamic music.

I have auditioned a well reviewed R2R dac by Merason and found its tone and timbre were excellent with simpler music particularly acoustic music.  However when it came to listening to more complex music it was unable to resolve the music and actually sounded muddy.  Surprisingly it became grating due to the confluence of "noise"; not musical at all.  I wonder if this is a characteristic of R2R or just an issue of the Merason.

@mdrone I highly doubt all r2r dacs do this, and I've never experienced this on the AMT, but not sure exactly what you are describing is the same as how I'm interpreting it. 

i.e. I can play some complex electronica, daft punk, etc and I don't feel It gets muddy or noisy 

in fact there is a review on the Holo May DAC by goldensound where he specifically calls out how well it handles some complex music. 

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.