I think it depends on your priorities and whats the most important aspect of a basshead HP youre looking for.
I feel that the Kannon is a better overall headphone and bests the SZ2000 in most,if not all areas.However the bass on the Kannons isnt nuanced,textured or layered.It sounds/feels the same regardless of what youre listening to...The slam against your skull when listening to Black Sabbath is the same as the bass you get from Hip/Hop...its an odd thing.
I'd take the SZ2000 if your goal is BASS,and nothing else,and youre willing to get into massive EQing,amping,pad rolling,etc.The Kannons certainly have their quirks too though.
I discuss THE Kannon/JVC comparison in my video review which can be found on my YouTube channel.Link in signature.
Keep in mind,im not a basshead.I consider the JVC to be the worst sounding modern headphone Ive owned and didnt like the Kannons much better,so this is def a case of YMMV.
Very interesting analysis in
your video about the Kannons. I still have yet to experience a pair of the Kannons or the SZ2000s, but from what I've been reading on Head-Fi and hearing about for the last few years, it looks like
my portable setup with DiscoProJoe's Rockbox EQ Presets (V-Moda M-100s, Cayin C5, Rockboxed iPod Classic with my app) is still the most suitable for me!
(Late last year I came out with another update -- Version 5.0, and posted an updated user guide and
short video for it a few months ago.)
Anyway, the SZ2000's apparent terrible sound quality in the mids & highs; its physical-modding requirement; its bulkiness, lack of a detachable cable, and lack of portability have all been keeping me away from it.
As for the Kannon, the first problem for me also seems to be its lack of portability. Its carrying case looks like the size of a briefcase, and the in-line controller would pose a huge problem when walking outside while carrying a handbag or umbrella, or while commuting via subway or city bus with standing room only.
I've always wondered about the Kannon's sub-bass lacking realism and detail (i.e., no air pressure change, etc.), and what you said in your video totally seems to confirm that. If bass guitars and kick drums in rock music sound the same as synthesized bass in rap, then the lack of detail is obvious.
But you also covered something else I didn't realize: you said the mids & highs of the Kannon are sub-par compared to the M-100's.
I've always loved the treble (i.e., highs) on the M-100, and its occasional bloated lower mids on some songs can be corrected by using the "Lite" and "Ultra Lite" midbass categories in my EQ-preset app.
So if the Kannon can't put out as good of mids & highs as the M-100, then that, too, would be a problem for me.
(On a side note, you mentioned in your video that some bassheads will EQ at 20 Hz. I never EQ that low, since very few songs have any sound at that low of a frequency, and trying to boost it is
extremely inefficient. Prior to Version 4.1 of my app (which came out in late 2016), I had been EQ'ing the sub-bass at the standard 32 Hz band. But even
that is too low for most songs. So I learned to set the Rockbox EQ "low-shelf filter" band at
40 Hz with a slightly-steeper slope rate than the default setting, and boo-yah: Version 4.1 was born! And in my app, the next four bands of 64 Hz, 125 Hz, 250 Hz, and 500 Hz (i.e., midbass and lower midrange) have settings that are unique to each midbass category that you can choose from.)
To be fair, though, my portable rig
does have at least one disadvantage. It can only work with a Rockboxed iPod Classic (or perhaps with some other older music players that can accept Rockbox firmware). You can't use it to watch movies or play games, so the Kannon would certainly have an advantage over my portable rig...at home while hooked up to a PC.
But then again, I rarely use headphones for movies or games, so that's not a problem for me.
Anyway, in closing,...not much seems to be happening in the headphone world these days, in terms of new products I'm interested in. (You can view
this discussion on the M-100 thread.) It seems that only wireless, planar magnetics, and IEMs have been the new ones trending in recent years.
Oh well....