Morning Tom
Thought to share a couple few thoughts - picked up some NAD HP50's (A$302) and some Airport Max's (A$900) - the former to see if I can tolerate headphones before spending any money and the latter to see if BT quality is good enough for me as an audio solution.
For context I've owned a slew of headphones / amps in the past - but never really gravitated to them. Circumstances more or less force me to now - domestic harmony, and no spare rooms following Covid working from home etc.
NADs
I can certainly see what you report about the NAD's, and I certainly share alot of your enthusiasm for them. They are very easy to drive, and are an engaging listen straight out of my M1 MBA - bass is quite good, mids are lovely and treble is nice and clear. I found they made most music sound great - no problem enjoying the Furtwrangler Beethoven's from his War Years all the way along to something like Billie Eilish. At their price point - nothing to complain about SQ wise.
I didn't get the sound-stage you report - but that's probably me and my ears. The NAD's were all abit 'between my ears', but that is a compliant I have with nearly all headphones I've heard - including open backs - unless really well driven. But then I haven't heard the top cans - HD800s, Meze Empyreans/Final D8000's/Stax 009's etc.
Comfort was for me average - the pads are on the smaller side, and didn't really fit my ears. They clamped abit as well.
Cf the Airpod Max's - well different - the Max's are initially much more comfortable for my ears - but after a couple hours it evened out - both cans got tiring - the Max's are heavier and clamp, the NADs are lighter, the pads didn't feel great and after a couple hours they clamp.
The biggest grip I have with the NADs is their build quality. The pads disintegrated after less than 15 hours use, and the supplied cord was faulty from day 1 - had to jiggle the 3.5mm connector to engage left and right channels. I also thought they looked and felt cheap - but that is highly subjective. But then they are what - US$200 or something. I wasn't expecting a Meze Empyrean.
That said - to me the build quality is levels beneath eg AKG 701/Senn 6xx type headphone - both of which can be had for around the $200-300 mark on Drop nowadays. By contrast the build quality on a good set of studio cans - say the tried and true Sony MDR7506's - is subjectively to me much higher: they are - what - $120 or something on sale these days.
Here is a photo of the pads - so you see what I mean. That is after less than 15 hours use.
View attachment 81466
Long story short - they are being returned. Happily enough with the sound quality - I think it is pretty good for their price - but I can't live with the build quality.
Airpod Max's
Onto the Max's - I had high hopes I could get away with a BT headphone as a solution to listening at home, and being iOS/OSX, these in particular. I don't use Apple Music. I use Spotify and PrimePhonic.
Unfortunately after a few days of using them, I can't share your enthusiasm for their sound quality. Given the next stop would be Ananda BT's at many more $$ (and which can't be returned here) - I'm giving BT up as a viable option.
I should say I've owned the Airpod Pro's for years (I think I have around 3 or 4 pairs lying around now). They have been a work and travel staple. Great for calls, perfect for airports, easy to have about you - I usually have a pair in my pocket - and useful for music/podcasts when I was doing something like cooking, or late at night when speakers would disturb the household - ours is a very open plan house. Hence why my humble but to me good sounding 2 channel got sold off and I'm heading down the headphone route of late.
I found that the Pro's got annoying to me after a couple hours or so use - I got sore ears - but as an iOS user who needs a bluetooth ANC for work - they are a no brain purchase. They also deteriorate after a year or two's use, which is annoying: very much a disposable product.
Funnily enough - my wife doesn't like the Pro's - she gets pressure build up, no matter which size ear piece she tries. Go figure.
Now onto the Max's. Build quality is typically Apple - very good. That said the case they are meant to live in is useless for any sort of storage protection, much less travel protetcion, and the aluminium (metal?) ear pieces I thought would scratch easily - suffice to say they have been handled very carefully since I got them knowing I may want to return them: have to love the 14 day no questions asked return policy with Apple!
Controls were pretty cool - and for someone used to the Pro's - entirely intuitive. Loved the dial up volume on the top. Pairing etc was flawless.
Onto SQ: hate to say it but to me they just aren't very good.
The folks over on HeadFi rave about their sub-bass. I thought it complete mush. Lacked any sort of impact and it all blurred into one. Worse it bled over into the mids.
Listening to eg Notorious B.I.G. "Hypnotize me" or Sneaker Pimps "6 Underground" (actually any trip-hop) or White Stripes "In the Cold Cold Night" , Tool, Led Zep etc wasn't a good day out. The bass lines no impact at all, what bass there wasn't crisp and clean, the mids merged... and well...you get the idea. I like deep bass, if tried to be reproduced, to be crisp and hard hitting. I'd rather equipment just not go there if it can't do it well. The Max's went there, badly, IMHO.
More positively - the NADs were much better in this respect. Much.
I won't get onto to Classical - which makes up about 80% of my listening - other than to say the Furtwangler Beethovens - or any Beethoven - wasn't a fun day out. The War Year Furtwangler have a really high noise level - and IME it takes a good set of cans to cut through that. The NADs did a great job of that - the Max's - not so. I don't even try it with the Airpod Pros.
Oddly back to back - I thought that the bass on the AIrpod Pro's was of better quality - principally because they just don't try and reporduce sub bass - its MIA - as well it might be. But what is there is punchy enough. I'd rather listen to eg Mees Dierdorp (deep house EDM I guess you could call it) on my Airpod Pro's than the Max's. The Max's go much deeper, but to me were slow and sloppy.
The mids were to me hopelessly coloured, and the highs lacked air. Overall I thought they were sounded veiled. I guess by now you can see I really didn't like them much.
Sound-stage and imaging weren't bad - about the same as the NAD's - but still between my ears. Maybe that is just something I will find with all headphones.
Apple iOS "EQ"
A number of folks on HeadFi have been playing about in the iOS/Settings/Accessibility/Airpods/Audio Accessibility Settings/Headphone Accomodation - in which basically you have a limited ability to mess around with Apple's "true tone' .... a limited EQ ....specific to that iOS device. Talk about buried in iOS settings...
As usual on HeadFi you get some folks telling you about some miraculous change in character by changing one of these settings - and that may be so - for them.
I found all I achieved was that in trying to fixing one problem I created another - and eventually I just turned the Headphone Accommodation off. Chasing my tail on that one.
Compared to the NADs - well - I much preferred the sound of the NADs. Agree with you 100% on that.
Conclusion
So - all up - I wanted to thank you for your recommendations - I enjoyed trying them both, and share your enthusiasm for the NADs - build quality aside. I have trouble accepting that they were - for me - up to the standard I would expect of a high end can.
So I'm returning both - one (NAD) for build quality, the other (Apple Max's) because I don't think they are worth the money. I just didn't think they were very good. Compared to the AIrPod Pros they were better in some ways for sure, but they aren't for me.
But that is the great thing about this hobby - we all can enjoy different things, and have different experiences.
In this post please don't think for a moment that I am questioning your experiences or listening - I share alot of your enthusiasm for the NADs, but not the Max's.
Thanks again