This is probably oversimplifying things, but it seems like a temporary 'band aid' solution would be to just modify the Harman curve based on the differences between the measurement systems' response, given an identical test input signal? Sorry if this is basically what has been suggested above...

Bought the Fiil t1x's. Will likely do a bigger review later. I'm pretty impressed, especially for $40. I mostly bought them because of convenience. The sound is pretty good but compared to my other headphones (NAD HP50 and KZ ZSN) these have some kind of spike in the treble frequencies that...

Usually but you can get cross-talk if the cables aren't shielded well

Why are there so few measurements for all these budget TWS earphones? There are so many options on Amazon and the user reviews are of course all over the place and untrustworthy in general. Can anyone tell me which would be best out of Fiil t1x, SoundPEATS truefree plus, Bomaker sifi, mpow m5...

I know people disagree with me, that's why I said it was a persistent myth... Look, the fact that you think they sound dull and lifeless without an (external) amp regardless of what source you're using indicates a level of irrationality with this. An iPhone generally is a very high quality...

lol this thread is 13 years old. I would hope at this point that the HD650's and HD600's have been characterized sufficiently. It is unfortunate though that I still see people propagate the myth that they need or benefit significantly from a headphone amp because that's really not true unless...

ahem https://www.amazon.com/gp/product/B07R5NJF5W/ref=ppx_yo_dt_b_asin_title_o04_s00?ie=UTF8&psc=1#customerReviews Be careful though. I wouldn't use these with any added foam mods as these are already thicker. I broke the headband on my HP50's from over-stressing them I think. Fortunately they...

I know you were asking other people but since I have 2 pairs of these headphones in front of me (mine and my friends), they both have the pleather flaking off. There are $8 replacement pads available on Amazon that I bought. They are slightly thicker too which is better for comfort. They didn't...

I know... it just takes some lube around the hinge.

Also if anyone knows where to find a replacement internal cable (the 3 wire one that runs through the headband), I would appreciate a link. It appears to be a very specialized cable. Directly from NAD it would cost $45 with shipping.

I see some discussion here about how they changed the headband and can confirm that there are 2 versions of the HP50. Here is a picture of both side-by-side: I discuss the differences in the review I just posted for the HP50 (although it's a little late, since the HP50's are discontinued)...

In white, these are going for $130 on Amazon. You won't find a better and more versatile set of headphones for this price. Hell, at $170 they're still a steal. I replaced some Senn HD600's with these (I think I paid $160) and could not be more happy. I'm surprised these aren't more popular.. it...