Double helpful on what Dave said. I have used those headphones for years. First the ATH M50 and now the ATH M50x. I never rely on them when I mix bass, or any headphones. I get better mixes on monitors when mixing bass.
They are good for mixing the mids and highs. Even the upper ranges of bass. Not so good for mixing bass though.
 
Long mix sessions on monitors at lower volume seems to help my ears hear the balances better. Long mixes on headphones cause ear fatigue which changes how I hear a mix. We tend to want the music louder on headphones. Probably trying to hear the mids over the bass. This causes ear fatigue, and in turn, causes us to make bad mix decisions.
 
Try mixing on phones for three or four hours. Get the mix sounding good. Now the next day listen to it again on monitors. I have never save a mix I made like this.

Starise
Double helpful on what Dave said. I have used those headphones for years. First the ATH M50 and now the ATH M50x. I never rely on them when I mix bass, or any headphones. I get better mixes on monitors when mixing bass.
They are good for mixing the mids and highs. Even the upper ranges of bass. Not so good for mixing bass though.
 
Long mix sessions on monitors at lower volume seems to help my ears hear the balances better. Long mixes on headphones cause ear fatigue which changes how I hear a mix. We tend to want the music louder on headphones. Probably trying to hear the mids over the bass. This causes ear fatigue, and in turn, causes us to make bad mix decisions.
 
Try mixing on phones for three or four hours. Get the mix sounding good. Now the next day listen to it again on monitors. I have never save a mix I made like this.

I have a different attitude. On my rig, I use the M50's and I do rely on them for the bass. This is mostly because I can actually hear the bass with these cans. That does not mean that critical listening/mixing through monitors isn't necessary, because it still is. Only that I can get a well defined bass with these cans and then confirm it through monitors, including a sub. That gives me two reference points before I have to take the mix out of my mixing environment.
 
Regards,
Dan

i have found that full range ear buds, decent quality,
will tell you more about your deep bass than the monitors or the regular headphones.
 
that said, i only use them for checking the lowest bass...
 
the way that the bass translates thru the monitors, is most important.
 
if you are hearing lots of bass in the ear buds, but not much thru the monitors,
then your eq for the bass is out of whack.

This experience has pushed me to do more testing of a mix on different speaker combinations.  And that includes mono.  I mostly ignored mono until now.  Often it is OK, but I have been surprised ad haw much the mix can change between stereo and mono.  I have a few songs where the vocal really slipped into the background on mono, even though the vox was dead center.  I think I tended to overuse panning and stereo width.
 
Having said that, it seems all "wideners" are not equal in this regard.  The Waves and Izotope wideners seem to be more mono-friendly than some others.  Could that be true or am I imagining it?

cparmerlee
 
Having said that, it seems all "wideners" are not equal in this regard.  The Waves and Izotope wideners seem to be more mono-friendly than some others.  Could that be true or am I imagining it?

It is very true. It really depends on what the wideners are doing.
 
Regards,
Dan

dcumpian
It really depends on what the wideners are doing.

For several years, I had used the Nomad Factory BT Stereo Imager that Cakewalk made available to its X3 users.  That has a very seductive quality that can really make you feel close to the performance.  But when you use that aggressively, it seems to do poorly with mono.
 
I have used the Izotope Ozone imager for awhile.  Its effects are much less dramatic than the Nomad plug, but I don't hear nay  problems going to mono.
 
I recently got the Waves imager.  This seems to be the best of both worlds, giving the ability to go aggressive like the Nomad one, but to my ears, it does better with mono than the Nomad.
 

When I mix only on headphones my bass seems to suffer on stereo speaker systems. If I get it right on the monitors, then it usually sounds good on earbuds, this statement seems like it should be opposite, but that's how it usually works. I make bad bass decisions on headphones, usually pulling out too much bass and then the music on monitors is bass wimpy. 
When going back to headphones on the same mix, the bass is ok. The outcome might be different for someone who uses monitors in an untreated space. I use ARC when I monitor without headphones. ARC tends to notch out a lot of the bass. In reality it really isn't eliminating the bass, what it's doing is eliminating the influence of that small room and evening out the frequencies Anyone who is in a smallish like 12' square or less room will have standing bass waves. The ATH-M50X has a slight bump in the mid bass ranges. As long as you know about it you can compensate for it.
I use the ATH-M50's mostly for mixing anything above the mid bass. I might even run my bass down when I mix on them which isn't a bad idea to make sure you have everything above that right. Then the bass is a back and forth kind of thing I do between the phones and the monitors. NEVER have I had the bottom end right only using the headphones.
 
I've spent 2 hours on a mix late in the evening on headphones, came back the next day and almost cried the mix was so bad.
 
 

 you can take that to the bank - it really is too bassy. It means that if the mix sounds bass-weak, then you can likewise accept that as fact - it really is bass-weak. It's only in that relatively small range between obviously-too-much and obviously-too-little where the uncertainty lies.
 

the audio models are the best headphones in existence in my opinion. Best sound by far.

I have auditioned the and I have also used Beats for DJing. For me and my personal tastes and listening habits