I once had the 6XX and I thought it was a pretty boring headphone, so I returned it. Later on I got the 660S for a really good deal and I think it's utterly fantastic! So it's interesting to hear that someone couldn't tell the difference between the two. I have often wondered if maybe my 6XX unit was a little bit off. It gets so much praise that I always thought about trying it again.

We need to bring back these goofy memes for good

Hey bud, let me be the guy who told you up front just to buy the Koss KPH30i for $30 and save yourself thousands of dollars chasing the perfect headphone. It doesn't exist, but one listen to the KPH30i and you'll have an experience that is 90% just as good as any $200+ headphones. They look cheap, but they come with a lifetime warranty so don't let that stop you from trying them. I only wish someone had spoken up at the beginning before I started this hobby and told me about them! I enjoy trying different headphones, but these would have been just fine.

Everyone's answer: "The ones I own!"

More bang for the buck.

The bass sound being boomy is not really the point of Crushers. It's the rumbling. It's a fun toy! Gun shots and explosions literally rattle your skull. So you want them to go boom! I got some for my son and I borrow them every now and then for games and movies. I still giggle! They actually do sound pretty decent too. He has the Evos. The mids and treble are actually pretty good. They are decent enough that I often wish I could turn the rumble off completely and just enjoy the music, but if you do you won't get any bass at all. So I don't really use them for music very often.

I don't think they are actually available for consumer purchase yet. There was just a demo for the press with plans to release it at a later date.

Yes, it's a great all around product! Definitely a great companion for IEMs and easy to drive headphones. I like it with my Koss stuff especially.

That's an Ifi Hip DAC he's running the IEMs off of. I have both the Qudelix and the Hip DAC. Let me tell you, the Qudelix is a great little thing, but it can't hold a candle to the Hip DAC in terms of sound quality and power. The Qudelix doesn't have a lot of power, even on balanced output. It gets plenty loud on most things, but by comparison, it has a thinner sound than the Hip DAC. The Hip DAC provides a punchier, more rich and wider experience. It's basically the mobile equivalent to the Zen DAC, which is Ifi's desktop DAC amp. I use the Qudelix when I am up and moving around, doing work or cleaning up the house. It provides a good experience. I love the app and all of the features that come with it. But when I am kicking back in the recliner I wire it up to my phone or tablet and use the Hip DAC. It's a much more satisfying experience.

My only regret is that I don't have the time to listen to each headphone in my collection enough. I have a few different ones that I use for different situations and I love them all but I feel guilty when I don't feel like I am spending enough time with each one. There's an argument that maybe a smaller collection, or even just one headphone, would solve that dilemma, but I really enjoy trying new gear.

The Zen Can's XBass is a little more subtle than the TrueBass button on the Zen DAC. I listen to Rock music mostly and I dig the punchy drums and thicker vocals, so I like to double it up! I do not think the Zen Stack sounds thin at all, very much the opposite actually. Which reviewer said that, do you remember? I pretty much never run the Zen Stack without some measure of extra bass, but it really is about four levels you can get with that setup. 1. No extra bass. 2. XBass Zen Can 3. TrueBass Zen DAC and 4. Both TrueBass and XBass together. I have different headphones that tolerate different levels of extra bass, so I like that Stack for all kinds of different uses and genres, and it's so easy to quickly reach over and dial it in when the tracks change and you want more or less without having to fiddle with an EQ. There's are some tracks with the Ananda that rumble so cleanly and deeply that I can feel them vibrate on my head! The track "2049" from the "Blade Runner 2049" soundtrack is my favorite deep rumble demo track. Give it a try with the Sundara and TrueBass activated. It's like a subwoofer! It's a fun way to watch movies, for sure. I do run the Zen Stack balanced as well. The Ananda doesn't need a lot of power, but it really opens up when you give it a lot.

I think the Zen DAC is great for my Ananda! That TrueBass button gives it some tight, punchy and rumbly bass because it is a planar driver. I would think that it's the same for the Sundara. A straight DAC without a feature like that is probably not going to make huge difference, at least, not for the amount of extra money spent. It's just a digital decoder. For me, that bass button is my favorite feature and it is particular to the Ifi Zen DAC. I even double the effect with the Zen Can bass boost sometimes. That's way too much bass for certain headphones, but not for the Ananda. The Ananda is not tuned for a lot of bass but it is plenty capable of playing some of the most satisfying bass I've ever heard, if you have the right setup. It's different from using EQ, too. The bass button only adds low end without sacrificing the higher frequencies. When you mess with EQ it effects the other frequencies. It's also very easy to push the button and shut it off, if you want to. Some tracks I only use the bass on the Zen DAC. Others I like to double it up with the Zen Can. I'm not sure what particular area you feel is lacking with the setup you have, but if you think it's lacking bass maybe you should try out a Zen Can amp with the Zen DAC. I really love that combo for the specific bass effect that I cannot replicate on any other setup that I have tried, on the particular headphone I have. I'd like to know if there are other systems that do the same thing, actually. Since the Sundara is a planar brother of the Ananda I would be surprised if it didn't perform similarly on the Zen Stack.

End Game doesn't exist as long as you still have curiosity about what other gear potentially will sound like. My curiosity tends to be toward the <$200 outliers. Stuff that "punches above its price tag." I have a Zen Stack and an Ananda and I am very happy with it! But I still get curious about how good the cheaper stuff sounds. I also have curiousity about the more high end stuff too, but I know that the higher prices do not equal a comparable jump in quality over the gear I have, so I tend to leave those alone. I know that I will not be receiving a good enough value for my investment if I go in that direction. The Law of Diminishing Returns keeps me from going too far overboard. "Better" doesn't really exist in this hobby after a certain point. "Different" and "Highly Specialized in Certain Characteristics" is where the very expensive stuff generally goes.

That's annoying! My Sony XM3 has a black smudge on the outer ear cup. They are the light colored ones, like these. I just have to live with it. I can't clean it off. It seems to almost be soaked into the plastic