How is it nonsense? High output impedance affects the tightening of the bass .
It's no more of a "nonsense" than giving out opinions that constantly change over time. I still remember you talking about how you thought the 598s had a bigger soundstage over the 701s - though you admitted in never doing a direct comparison - and about how the 598s had an "edge" over your Q701s over your music. Obviously, you'd probably disagree with this today. Which brings up another point: have you done a direct comparison between the K701 and Q701? I really am curious what you would think of those two under a real double blind test.. very curious. I doubt it would matter much regardless though, considering how much variations between AKG models that exist.
Well the problem is that way too many of these science guys claim the E9 with the Q701 is garbage due to it's 10 ohm output impedance, yet don't even bother to try it! Couldn't be any further from the truth. Automatically assuming it's going to mess with it's signature is a bit dumb. They even post this garbage in Amazon reviews after someone uses the E9 with the Q701 and claims it sounds amazing. What the heck..way to ruin someones fun.
Unless you can find a quote, I don't believe I ever said the 598 had a larger soundstage than the K701. If I did, that's a bit dumb. Maybe I had been using it with some random weird amp/dac that gave me this effect. It all depends a lot on my current setup. The only headphone i've tried that has a larger soundstage than the K701 is the AD700 and K501.
Why are you bringing this up exactly? Throw dirt in my face? People's opinions change all the time, this is nothing new. I know you think the HD-598 is the world's most perfect headphone, but you're just lying to yourself if you think you won't find your opinions possibly changing on it after time. We'll see if you still have it in 2 years. It seems the best headphones I own are the ones i've owned the longest. Most people here just go through so many headphones. I've never heard a headphone sound amazing and then suddenly claim the opposite later on like some people. I do however love to pick apart my headphones and find negatives of them. There are very few perfect headphones, but the Q701 is close for me. Generally it takes me a full month to really determine how much I like a headphone. I didn't start complaining about the HD-650 until about the 30 day mark. I've found that if I hate a headphone out of the box, it VERY rarely changes. There's a few that have.
Yes, it's true, there is some music I prefer on the 598 over the Q701. There is also some music I prefer on on the DJ100 over both of them. For me there is no headphone that's GREAT for everything. I've found though that the Q701 does well with all of them.
You seem like you're on a one man mission to get people to try the HD-598. That's OK, I do that with my DJ100 all the time. The HD-598 is a nice headphone, but it's not perfect IMO. I'd probably take the Q701 over that if I had to choose. It just needs a good amp/dac to be at it's best. I do think the 598 is better than the HD-650/600 (maybe not technically better), but not the K601 and Q701. I think for some, the HD-598 is easier to like.
I do like the 598 for female vocals and for it's larger soundstage. Also doesn't bother me much when I use it without an amp unlike the Q701.
I had the K702 and the Q701 at the same time once. Never did any blind testing, but I don't feel the need to prove to anyone what I'm hearing. I can just post my impressions. If they don't agree or trust them, then that's OK. I'm not going to compare my HD-598 to my Q701 in depth because it ruins the fun of listening to them. I've done this way too much in the past and it makes me hate listening to headphones. None of them are going anywhere. I did however do a K601 vs HD-598 review. You can search for that, but the K601 is much different than the Q701. Maybe I should check my review and see if my old impressions are the same or a bit different.
BTW impressions of headphones can vary somewhat for me due to switching amps and DACs. The HD-650 and Q701 change a lot with different gear. More so than some other headphones.
My impressions of the K601 and DT-880 600 with the Asgard were NOT good. The K601 is really bad on some amps. Same with the ATH-AD2000.