strange frequency response of m2tech evo
anyone has done any measurements of m2tech evo usb/spdif converter? I am somewhat confused with it objective performance numbers(I am quite satisfacted with it sonic , even if quite diferent form other product)
when first tried m2tech evo sonicaly I noticed some lack of airiness in sound(less expansive soundstage) but the soundstage focus was superb as bass tightness. one day I decided to use m2tech evo for speaker measurements(it gets digital MLS signal from laptop, and feed DAC) to my surpsise i saw some top octave roll off. on white nois eI can even tell from the ears(I have designing speakers form many years) i imedialty returned to chineese made thera-linx usb/spdif converter (which measures EXACTLY like internal pc measuring equipment),
thinking my unit is defective i ordered another m2tech evo unit with more late serial number, hoping its a problem of actual unit rather then design fault. but it measured the same. later i acquired weiss int202 which also confirmd to be flat ( weiss int 202 measured exactly the same as thera-linx or internal pc measuring hardware)
i tried everything -
1)diferent DAC's,
2)rca. xlr, st outputs(didnt tried i2s as its format not compatibile with my dac's)
3) variuos power suplies- the problem stays here.
could m2tech evo designer answer here. I do not want to shock customers, but I want an answer why this interface have rolled off top octave. it evenmeasures from 1.5meter on speaker axis!!
greetings to all
R.
