What sort of preferences/requirements do you mean?
I like headphones that measure as closest to flat as possible, so HD600, HD650, and HE400i, with a little corrective EQ - peak cut to flatten out peaks (HD600) or bring out a little bit of where it nosedives (HE400i) or a wideband cut to get the overall balance right on something that otherwise has no sharp and narrow deviations from a relatively even curve (HD650).
But then you have people who think the HD650 is too dark; the HD600 is still dark, or it's bright; the HE400i is boring or it lacks bass or it has midrange that isn't pushed forward. Or that the K701 is what counts for "flat" when it has a peak in the treble and a relatively early bass roll off. Some people prefer a jagged curve and think the sound is due to magic as opposed to those upper bass and midrange bumps coupled with high efficiency which means the headphone doesn't stress the amp driving it (ie, Grado).
I'm not sure where you stand in there so I can't speak for your preferences.
The HiFiMan's look nice, more so the HE400i but getting pretty pricey. What is special about them?
They're planar magnetic drivers which tend to have a smoother response. And by this generation they're even smoother - response is almost totally flat from 1000hz down to 10hz. Above 1000hz it's more jagged but no severe peaks that go too far above 1000hz, which means there won't be a totally skewed response where you crank it up and get a face full of cymbals and higher pitch vocals. The sensitivity is also much higher than older planars, but at 93dB/1mW, it's still not all that high. It's just that you don't need a huge amp with a huge power supply surrounded by fat capacitors to get them loud before clipping and distortion.
Planars are also less affected by damping factor loss due to a high output impedance on whatever they're plugged into compared to dynamic drivers, which relies a lot on it to keep driver distortion low due to how they pump in and out more to move air.
HE400S has a response more similar to a good dynamic driver like the HD600 but still lower driver distortion, plus its low impedance won't be as big of a problem if you're not using a decent amplifier, as well as its high sensitivity at 98dB/1mW.
The HiFiMan's look nice, more so the HE400i but getting pretty pricey. What is special about them? Is HD6x0 is not an official Sennheiser model is it? I think you were intending HD600 or HD650 models?
Lower case "x" is a placeholder, a variable. Like in Algebra where you go and find "x." Like X = 650 - Y.
Lower case x is either 0 or 5. HD600 or HD650.
Upper case and it's the Massdrop version of the HD650 - the HD6XX.
So these are all open headphones, is that your preference for an all rounder headphone?
Depends on what you mean by "all rounder."
I buy headphones that sound similar but I have a headphone for listening at home, and two IEMs for outside, with one being the "beater" that goes with me to the gym, rougher public transport or locations (like the kinds of places where having a camera would be nice, but you'd have to watch it or you'll lose the camera, the phone, the IEM...everything....I understand you might not have such places over there though).
If you mean everybody else on this forum who either buys one headphone for each music genre or buying one that plays all, I just don't get that. Either a headphone plays to one's hearing weaknesses like older people who need Stax so it doesn't roll off at the top end (not to mention they are more likely to be able to afford it) or preferences like if it has a lot of bass; or jsut get one that is realtively smooth so it doesn't alter whatever the sound was like to the engineers who mastered the tracks, which if you have one with low driver distortion and an amp that won't clip too soon and can keep the drivers under control, can take a lot of bass boost EQ for when you switch over to music that needs a lot more of that. I don't even boost the bass to rumble on the HD600 - I just boost 35hz so the 20hz to 40hz range can catch up closer to how loud 1000hz is.
The Sennheiser HD600 are a whopping 600 ohm vs the HiFiMan 30 and 60 ohms, so is higher not necessarily better anymore?
The HD600 is 300ohm. The Beyer T1, some alternate versions of other Beyer headphones, and the old AKG K240 version are 600ohms.
Higher impedance can mean less stress on the amp driving it. Not absolutely though. But it means higher damping factor (ie more control) and less need for more extreme current performance. Look at how most speaker amps are only stable down to 8ohms nominal, and "hard to drive" speakers have low sensitivity and either have a nominal impedance of 4ohms or swing down to 2ohms on some frequencies even if the nominal is 8ohms. They might squeeze out more power at 4ohms nominal or when they swing below, but even some amps that push out more power there either pile on too much heat (if not also distortion) or some actually start leveling off power delivery and can't keep up with the lower sensitivity. Headphone amps don't go too low as to cause this problem but there's still the matter of output impedance, but more modern amps generally do not have this problem.
The thing about high impedance, high sensitivity cans though is that they'll be easier to drive than a low sensitivity, low impedance counterpart. A 32ohm headphone might squeeze more power out of nearly all amplifiers (OTL tube amps deliver more power at 300ohms and lower as load impedance deviates, but still has more power at 600ohms than at 32ohms) but if its senstivity is more than 3dB/1mW it would have to be an amp that severely drops voltage output as to have drastically lower output at 300ohms for it to not get the high impedance headphone to the same volume output.
HE400S deals with that since it has a 98dB/1mW sensitivity while its 22ohm impedance isn't as big a problem as 32ohm on dynamic drivers. Although again if you get a fairly modern amp from most manufacturers - or in this case the AE-5, which already has a low output impedance for an internal soundcard - you'll get more power to it at 22ohms while having the same sensitivity as an HD650.
Why would these headphones still benefit or be necessary with an external amp vs the AE-5's?
AE-5 is still an internal soundcard. Low sensitivity headphones need a fair bit of current (the AE-5 still isn't running with a large power supply not running anything else, and while PCI-E delivers more than 75watts, it's still not the same as having its own, good quality power supply), and high impedance headphones need more voltage (and compared to a Magni3 or Vali2 the AE-5 drops more in output at 300ohms). With these and the AE-5's otherwise good specs it
might be hard for you to tell the difference, so as long as you have a high sensitivity headphone, I wouldn't strongly recommend getting a separate amplifier or DAC-HPamp.
Lower sensitivity (or very high impedance, ie, over 300ohms) is another matter though. But that's also why I'm not pushing you to get any such headphone.
You sound like your a big fan of Schiit? I think we've had some of their stuff in NZ but nothing currently. Same for the Violectric V200, looks like we had it but not currently.
Not really that much of a fan of Schiit. Yes, I admire what they bring to the table; yes, I admire how they made the business model work. However for amps I'd use myself I'm more into spending a bit more on an amp that errs on getting very slightly warmer when pushed than brighter like Meier and Violectric. Of course, there's one thing Schiit does that they don't - the Asgard is a full Class A design and I love it. Not necessarily what I'd recommend you get over the Magni3 or Vali2. I can hear subtle differences worth the increased price to me but not necessarily for you.
However they're easier to recommend because of the cheaper price. And how they can be ordered internationally more easily than AudioGD, which some people find either confusing or sketchy. Meier is a great amp manufacturer since they package Crossfeed, but even with worldwide shipping factored into the price, 1) you don't need it when you have a DSP and 2) the two DACs they make are a portable USB DAC-HPamp (that you can't use with the soundcard) and a $600++ DACcord that goes with their $600++ Classic amp, which, while you can use with any other amp, I wouldn't spend that much on the DAC if you'll spend a lot less on the amp.
Is there anything that sticks out to you on our local site?
https://pricespy.co.nz/category.php?k=602
probably something in here too:
https://pricespy.co.nz/category.php?k=36
https://pricespy.co.nz/product.php?p=3595050
https://pricespy.co.nz/product.php?p=2500943
https://pricespy.co.nz/product.php?p=3105595
https://pricespy.co.nz/product.php?p=1739993
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Or order from Australia:
https://addictedtoaudio.com.au/collections/headphone-amplifiers/products/auralic-taurus-preamplifier
https://addictedtoaudio.com.au/coll...audio-conductor-v2-plus-headamp-preamp-dsddac
https://www.storedj.com.au/mayflower-arc-headphone-amp-and-dac-w-usb-rca-and-optical-connections
https://addictedtoaudio.com.au/coll...ucts/schiit-audio-magni-3-headphone-amplifier
Still waiting for the freakin AE-5 to land in NZ but not too much longer I hope.
You can get a Soundblaster Z and just use a headphone amp or DAC-HPamp with SPDIF optical input with it. Or just wait for the AE-5 and choose the right headphone it can drive without an amp.