i must be about 250h ish into my 325is. the first 100h was burnt in with 20 min of pink noise with 2 min of digital silence cycled.
My duet has about 550h ish on it maybe more.
i use a apogee duet (had a ibasso d10, didnt like it.) to drive my grado's from my mbp. the source is either 320 to flac/lossless.
i find the pairing of the 325is and the duet to be a fantasic match. very clean instument seperation, highs settled in with burning in and a very detailed punchy bass. its mids is where i feel these thing shine, vocals mwah, fast rock/rock gets you toe tapping, as headbangin tends not to bode well with headphones.
if you cant tell im a huge fan, at first the question did i make the right choice? bugged me, harsh high's etc. a bit of a burn in and the can's settled in, and began to sing with clarity of no other in this price bracket (or a few bracket above for that matter)
for "in you face", detailed, punchy controled bass (not the sloppier hd650 stuff i get form my set up) these put a smile on my face every time.
for the duet since the day of purchase, im a happy customer. at first the initial cost gave me a slight question of was this the right thing. well now i feel i can answer that. YES, HELL YES. lov it as dac to my amps, love it as portable set up with my MBP. great bit of kit.
even though i favor my 325is paired with the duet, i do find it runs the hd650's well.
its only listening to the hd650 on a tube amp you realize there is more out there.
but at a much higher cost and without the option of portability. As a compromise not a bad one.
Cant wait to stick a woo wa6 maxed in that set up. if not for the 325is but for the sake of my hd650s.