Sennheiser's HD 800 - You nailed it Sennheiser!

I'd like to clear a few things before you read the review. 

1. Sennheiser India was kind enough to lend me their HD 800 for a home demo, for an undetermined length of time. Knowing fully well that I won't be buying them. As I can't afford them at this point in time. So I'd like to thank you Sennheiser India for this kind gesture. 

2. The demo unit is a piece from 2009. One of the first 250 HD 800 headphones that Sennheiser built. So it is the old version. And doesn't need more burn in either. 

3. You'll be disappointed to know that most of the review was done with the Sonarworks Headphone Plugin. SW is a VST plugin that corrects the headphone's frequency curve to bring it as close to neutral as possible. I also enabled the Linear Phase option in SW alongside. 

4. The reason for doing this was because in its stock form, the HD 800 was way too bright. And coming from the HD 650 I was unable to adjust. Nevertheless, the HD 800's sound fantastic even with SW enabled. 

The Test Setup

Headphones - HD 800 (old), HD 650 (2013 - silver), HD 700 - All burned in heavily due to their age.

Amplifier - Project Ember Hybrid Tube Amp by Garage1217.com (with supercharger) -> Sylvania 6SN7WGT

DAC - Asus Essence One Muses Edition

Software - JRiver with Sonarworks for HD 800, HD 650 and HD 700 (HD 800 setting)

Music - Recent Bollywood

Now. 

You should get ready to read the review. :)

REVIEW

Long story short, you'll be delighted to know the HD 800 blows away both the HD 650 and HD 700. 

The HD 800 is clearer, cleaner, faster, more detailed, has much less distortion and just better all around. 

In comparison, the HD 650 sounds muffled and distorted. It almost seems like a toy compared to the HD 800. Now. You may not like to hear this. But this is indeed the truth. 

The only advantage the HD 650 has over the HD 800 is that it is a touch more musical and lusher. But the HD 800 is plain and simple better. And so much better than you'll never touch the HD 650 if you buy the HD 800 once. 

After hearing the HD 800 for a few days, I'm finding it really hard to go back to the HD 650. 

You name it. Breaking through congested passages. A larger soundstage. Better sound isolation. The HD 800 nails it nearly every time. 

Even with SW, the HD 800 is a bit brighter than the HD 650. But no big deal. Without Sonarworks, yes, you'll find it hard to listen to the HD 800 if you're not used to a bright sound. 

But that too has perhaps been fixed in the 2013 revision of the HD 800, perhaps. 

Anyway, both headphones were used with Sonarworks. 

And there isn't much of a contest. 

You should take the HD 800 over the HD 650 for anything and everything. For all types of music. 

Comfort

HD 700 >= HD 800 >> HD 650

Both the HD 700 and HD 800 are very comfortable. The HD 650 isn't in the same league. Although it is pretty comfortable on its own. 

Mids

HD 800 is cleaner and clearer. HD 650 is lusher. But HD 800 is in a different league altogether due to its lower distortion. 

Treble

HD 650 has recessed treble. 
HD 800 has forward treble. 
With Sonarworks, I prefer the HD 650's treble over the HD 800's treble. But only because the HD 800 is still brighter. It is still better in every other way. 

Bass

Again, HD 800 has less bass. But better bass. You know that!

Soundstage

The HD 800 feels like it has a 50-100% bigger SS as compared to the HD 650. 

Everything else

The HD 800 is clearly a big step up. 

To wrap it up

I'd even say if they could take care of the bright treble of the old HD 800, it would be perfect. 

The HD 800 deserves to be priced 3-5x the HD 650. IMO. Your mileage may vary. 

And the above impression hasn't been formed over 10 minutes. Initially, I was a bit disappointed. But having heard the HD 800 for a while, going back to the 650 was shocking. 

There is a big difference!

I recommend the HD 800 wholeheartedly. To everyone. 

P.S. HD 700 vs HD 650 review - http://akshaytalwar.blogspot.in/2016/03/sennheiser-hd-700-sennheisers-queen-in.html

Reviewed at:

http://akshaytalwar.blogspot.in/2016/04/sennheisers-hd-800-you-nailed-it.html

http://hddaudio.net/bb/viewtopic.php?id=10726

http://diyah.boards.net/thread/1276/sennheiser-hd-800-650-700?page=1&scrollTo=20697

http://www.hifivision.com/headphones/63098-sennheiser-hd-650-vs-hd-800-review.html

http://www.erodov.com/forums/sennheisers-hd-800-you-nailed-sennheiser/83101.html

https://www.techenclave.com/community/threads/hd-800-vs-hd-650-vs-hd-700-sennheiser-reviews.179507/

http://www.superbestaudiofriends.org/index.php?threads/sennheiser-hd-800-v-s-hd-650-v-s-hd-700-review.2028/

http://forum.digit.in/audio/197202-sennheisers-hd-800-you-nailed-sennheiser.html#post2286847

http://www.head-fi.org/t/398829/the-sennheiser-hd-800-the-first-listen-the-first-review/5865#post_12562712

http://www.head-fi.org/products/sennheiser-hd-800-headphones/reviews/15944

https://www.reddit.com/r/headphones/comments/4i959m/sennheisers_hd_800_you_nailed_it_sennheiser/

Also, updated the review on Amazon.com and Amazon.in, both 5 stars :)

Sennheiser HD 700 - Sennheiser's Queen In 2016

Sennheiser was kind enough to lend me their HD 700 for a home demo. And as you know, I already own the HD 650 (silver drivers) to compare them to. And thankfully, Sennheiser has also agreed to lend me their HD 800 in a few days, for a more thorough side by side comparison. But that is best left to another review.

I'm not sure whether these HD 700 headphones have been burned in or not. But. Neither do I care. Because I'm not a big believer in burn in making a radical difference to the sound. At least in the majority of cases. Anyway, just mentioned this to explicitly state that I've no idea.

How much time have I spent with Sennheiser's HD 700 so far?

Not much. Less than 24 hrs in fact. But. I've already listened to a few songs I'm reasonably familiar with.

So. This isn't a review done after extensive testing. But. I've tried to be as accurate as possible.

How much time have I spent with the HD 650 and the rest of my setup?

At least over 2 years or so. Maybe longer. So that shouldn't hinder this review.

The Setup

Headphones: HD 700 (2012), HD 650 (silver drivers)

Headphone Amplifier: Project Ember v1.0 (just tried a single tube, Marconi 6dj8 is what I recall from memory)

DAC: Asus Essence One Muses Edition

Transport: Asus Essence STX SPDIF to the PC

The HD 650 was tested with and without Sonarworks. Sonarworks is a VST plugin that neutralises the tonality of supported headphones. Sonarworks doesn't support the HD 700 yet.

Music

Bollywood (Arijit Singh etc)

Mozart (very little)

I'd like to sum up the basic advantages of each headphone over the other, before I proceed to a more detailed review. So those in a hurry can still quickly get to know the overall gist in brief.

Advantages of the HD 700 over the HD 650

Way more comfortable. In fact, the HD 700 is so comfortable that that alone justifies twice the price over the HD 650 if you consider them equals otherwise.

More or less better all around when it comes to technical prowess.

Clearer, cleaner, more articulate, crisper transients and better speed.

The overall sound is very tight and coherent.

The bass is a lot tighter.

Much better resolution; more detailed.

Reasonably improved soundstage and imaging.

More open and slightly more speaker like.

More detailed and believable vocals.

Basically, the difference in going from a mid range to a high-end can. 

Disadvantages of the HD 700 over the HD 650

Additional treble that makes it unnaturally bright (not ear piercing though).

Fatiguing and not as polite for extended listening sessions.

There is something that makes them sound less natural and less musical.

The tonality isn't as neutral; the vocals are a bit upfront as compared to the rest.

Advantages of the HD 650 over the HD 700 (Many of these advantages may be audible only if you have Sonarworks, as that takes the experience to another level.)

More musical, lush, smoother and sweet overall.

The bass isn't as tight but perhaps more natural and with greater punch.

The treble isn't as sharp; it is smoother.

More suitable for extended listening.

It has most of the pros of the HD 700 but not quite to the same level. In terms of technical prowess, it is what it is. An outdated flagship. 

Now.

You're probably waiting for a more in-depth comparison between the two. And that is exactly what I'm coming to now.

HD 700 v/s HD 650 (with Sonarworks) - One on one

Sound signature

HD 700

The HD 700 isn't as connect in tonality. But it is a very enjoyable sound signature nevertheless. The bass is super tight. The treble is lively and slightly Brit. The vocals are upfront. The sound is very tight overall. Everything is very tight.

HD 650

More neutral and balanced. Sounds smoother and sweeter, more musical. Nothing stands out even though the vocals are delicious.

Soundstage & Imaging

HD 700 > HD 650

The difference isn't huge. But is still significant. And easily audible. Can be a deal breaker for many once they get used to the HD 700.

I'm not too certain about the imaging. But. I think the HD 700 has an edge there as well.

Vocals

HD 700

More articulate and realistic. They have better resolution and are more detailed. Also more upfront. Crisper.

HD 650

More musical, rounded and smoother. But not quite of the same stature.

Bass

HD 700

A lot tighter. Perhaps artificially tight. Not sure though.

HD 650 

Far more hollow and rounded. But a tad more natural. Smoother. And with more punch.

Treble

HD 650 > HD 700

HD 650's treble is just right with Sonarworks. HD 700 is a bit peaky and that takes time to adjust to. Note, the HD 700 isn't very bright. But the 650 is just more natural and balanced.

Transients, speed, articulation

HD 700 > HD 650

Not even a contest. There are really far apart here. The HD 650 is very good in its own right. But not of the same pedigree.

Timbre and tonality

HD 650 is a bit better than the HD 700 here.

Comfort

Don't get me wrong. The HD 650 is pretty comfortable on its own. However, although its sound is suitable for extended listening, it's comfort isn't exemplary. It is just good.

The HD 700 is probably the most comfortable headphone ever. More comfortable than the HD 800 I think. (I have tried the HD 800 twice.)

It is like going from average to superlative in terms of comfort. That alone justifies 2x the price for the HD 700.

Finally. Is the HD 700 a true upgrade to the HD 650?

Technically, yes. Definitely.

However, since the sound signature isn't exactly the same, subjective preferences may differ. Some may take one over the other.

But as far as technical prowess is concerned, the 700 definitely has an edge. And a definite one at that. And combined with the much better comfort, its price is justified. Without doubt.

Yes. I recommend the HD 700 over the HD 650 even at twice the price. But only if you feel the need for something that the HD 650 is unable to deliver. And ideally, you should try to audition before you buy it.

Update to Sennheiser HD 700's review

I have had a chance to listen to the HD 700 with two more setups:

Asus Essence One Muses DAC/Amp

iPad Mini 2 -> FiiO E12

I also compared it to the HD 650 with both setups.

The Fiio E12 setup sounds pretty good. With both cans. But not quite at the level of my previous setup or even the Asus E1 Muses.

I didn't do an AB test or DBT, so I can't be sure. And being an objectivist, I'm not sure why or whether there should be this kind of difference. But for some reason, the Asus setup sounds cleaner, clearer and less muffled.

The FiiO E12 is very good in its own right. And even with low gain I'm at about 12 o clock to get reasonably loud volume with either headphone.

HD 700 vs HD 650

After some more listening, I have come to realise that the HD 700 is a clear and very significant step up. And not only in terms of comfort. 

The HD 700 is a lot cleaner, clearer, tighter, more articulate, faster and just gets the vocals a lot more right. 

The HD 650 is still better for extended listening as the HD 700 does fatigue you after a while. But I've become used to HD 700's treble in under 72 hrs (and less than 2 hrs of use). It is not really fatiguing. But definitely a bit for extended listening. Unlike the HD 650. 

Everything else goes in favour of the HD 700. You can hear a lot more detail. And the transients are a lot crisper as well.

The HD 650 does sound musical and lush. But vocals are relatively frighteningly real with the HD 700.

Honestly, I can't see much reason to choose the HD 650 over the HD 700 except for the smoother treble and better suitability for extended listening.

The HD 700 is difficult to use for over 20-40 minutes tops at a time. Unlike the HD 650. But that could be very personal. I couldn't listen to Soundmagic E80s for over 5 minutes tops. So maybe I'm just used to the less treble energetic HD 650.

Also, do note that most of these comparisons have been done while using the HD 650 with Sonarworks. So the HD 650 was dot neutral. In its stock form it is a bit too laid back for my tastes. And just can't compete with the HD 700.

Stuff like breath and air movements are something that really make the HD 700 shine. The HD 650 is okay here. But not in the same playing field.

The Fiio E12 does a good job with both the HD 700 and HD 650. But. I don't know why. I preferred the Asus Essence One Muses Edition with both the headphones.

Solid State vs Tube

For some reason, I always felt the HD 650 felt dead and cold with the Asus Essence One Muses edition. It felt lifeless. Like something was lacking.

However, the HD 700 also fares really well with this solid state amp. In fact, I preferred it with the Asus over my hybrid tube amp Project Ember, I think. I'm not sure though.

But. With the HD 650 I always chose Project Ember instead.

Now I'm really not sure why this is happening. I may have gone mad and maybe this is all placebo. But these are my findings so far...

P.S. Honestly, after listening to the HD 700 for a while, the HD 650 sounds like a distorted and muffled mess. The difference is at least as big if not bigger than moving from a HD 598 to a HD 650. The jump is probably a lot bigger in fact.

The HD 700 does better most of the stuff the HD 650 does well, and much better at that. But it is definitely a different presentation. And it is best to audition before you buy either!

BOTTOMLINE

Go for the HD 700 if you want:

More clarity, a clearer and cleaner sound, a tighter sound, tighter bass, more treble, better transients and speed, better soundstage and a more airy sound, better comfort.

The HD 700 is better in all of the above by the HD 650 but not hugely so. The difference may be big if you don't use Sonarworks. But with Sonarworks the difference is audible but not big.

And if you use Sonarworks with HD 700, it actually sounds a bit more natural but worse overall. And even closer to the HD 650 in terms of the above. So I prefer the HD 700 without Sonarworks. Obviously I am using HD 800's Sonarworks profile with HD 700 as that is the closest available.

Go for the HD 650 if you want:

Most of the above (HD 700's strengths but just 90% of the HD 700) along with a more musical sound that is lusher, sweeter, smoother, better for extended listening while also retaining 90% of the HD 700's strengths but not quite 100% of the HD 700. Also, the HD 650 scales better I think. And is more amp dependent. Of course, this experience is with Sonarworks for the HD 650. So it may differ for you.

Also, the HD 650 sounds more natural and real with Sonarworks. Even though HD 700 does produce more realistic vocals and extremely tight bass.

I prefer the HD 650 personally. But it does come down to personal preference. There is no doubt that technically the HD 700 is a more capable headphone and Sennheiser nailed the comfort and design part. But the HD 650 just sounds more natural and right.

But again, many people prefer the HD 700 over the HD 650 and over even HD 800.

Also posted on:

http://www.head-fi.org/products/sennheiser-hd-700-headphone/reviews/15460

https://www.reddit.com/r/headphones/comments/49tydr/hd_700_vs_hd_650_comparison_review/

http://hddaudio.net/bb/viewtopic.php?id=10593

http://www.hifivision.com/headphones/62490-hd-700-v-s-hd-650-a.html

http://diyah.boards.net/thread/1215/hd-700-650-comparison

http://www.erodov.com/forums/showthread.php?p=996812#post996812

https://www.techenclave.com/community/threads/hd-650-v-s-hd-700-comparison.178711/

http://www.superbestaudiofriends.org/index.php?threads/hd-650-vs-hd-700-review.1578/

http://www.head-fi.org/t/612502/sennheiser-hd-700-impressions-thread/5985#post_12410575

http://forum.digit.in/audio/196578-sennheiser-hd-700-review.html

http://www.amazon.in/review/R3IWH7177FDIYB/ref=cm_cr_dp_title?ie=UTF8&ASIN=B0070U8KSM&channel=detail-glance&nodeID=976419031&store=electronics

http://www.amazon.com/Sennheiser-HD-700-Headphone-Black/product-reviews/B0070U8KSM/ref=cm_cr_dp_synop?ie=UTF8&showViewpoints=0&sortBy=recent#R1JTF7CQKBF23E

http://www.amazon.de/product-reviews/B008B8UBCA/ref=cm_cr_dp_synop?ie=UTF8&showViewpoints=0&sortBy=recent#R1N99TVT4N3T74

https://www.amazon.ca/review/R2C77TUCCIGJ14/ref=cm_cr_dp_title?ie=UTF8&ASIN=B0070U8KSM&channel=detail-glance&nodeID=667823011&store=electronics

Also posted a review on Amazon.co.uk, Flipkart.com and Infibeam.com.

Philips SHE-3590BK IEM Review

Cost approx INR 400 or so or about USD 6 or so

Biggest Advantage:

More comfortable than any IEM/EarPod I have ever worn. I have had several expensive and cheap IEMs in the past, these are hands down the most comfortable I've ever worn. It isn't even close. The difference in comfort is huge. 

My ears don't ache when I wear these. Unlike other IEMs. The moment I use any other IEM my ears have always ached. These aren't perfect, but much better in this regard. 

And I'm talking of stock tips. Comply tips are the most uncomfortable for me and I fail to understand how people find them wearable. And I've bought both comply and monster tips in the past. But these IEMs are hands down the most comfortable I have worn till date. 

Headphones are still more comfortable. But these are pretty decent. Unlike typical IEMs that are a big pain. 

Coming to the Sound:

I have owned much more expensive IEMs in the past like Monster Turbine, Soundmagic E80S, Soundmagic PL50, Sennheiser CX500 and others. 

I won't say these are as good. But they aren't that far either. I actually sold my Monster Turbine after I got these. Yes, the monster turbine were a bit better. But not worth the discomfort that came along. 

And no, these aren't neutral. They have a V shared sound signature. Similar to the Soundmagic E80S. But they have less treble energy than the Soundmagic. These are less harsh and less fatiguing. Even if the Soundmagic E80S (retail USD 99) were for USD 5, I'd still take these Philips over them because:

1. They are not as harsh. 
2. These aren't as fatiguing and bright. 
3. They are way more comfortable. 

Of course in terms of clarity and transients the Soundmagic has an edge. But wearing the SM for a few minutes is enough to give me a headache. And yes I did burn them for a few hours. And the Philips sound okay right out of the box. 

They can't rival high end speakers or headphones for sure. Nor are they the ultimate in neutrality. 

But they definitely compete with IEMs a few times their price. And when it comes to comfort they are legendary. I don't even see the reason to experiment with more Hifi IEMs any longer because all of them are uncomfortable. That and because I'm mostly a speaker and headphone guy. :)

The sound of these Philips IEMs is good. Of course you can do better for several times the price. But these aren't bad. I'd buy them over anything else even if they were 4x or 5x their current price. 

I don't see much wrong with them. Yes, they are far from neutral. But considering the V SS they still aren't fatiguing and harsh like many others. 

They aren't the most clear or articulate if you include competitors in the sub USD 50 market. But they aren't bad. And you must remember that they are a steal even for USD 20, much less the USD 6 asking price. And still have their merits that punch well above their asking price. 

Highly recommended!

Audiophilia: WhatsApp Group for Audiophiles

Hi guys

I have started a WhatsApp group for Audiophiles all over the world.

If anybody would like to join, they are most welcome.

Please message +91-9910623813 via Whatsapp if you want to get added to the group.

I have also started a MeetUp.com Virtual Meet group for audiophiles all over the world (not just India). Should you wish to become a part of it, please visit the below link:

http://www.meetup.com/audiophilia

You may join both if you want, that would be best.

And of course there is no fee involved. It is absolutely free for all audiophiles and other interested people :)

Thank You

Aakshey

Superlux HA3D Headphone Amplifier Review

I'd like to tell you that I had read a lot of excellent reviews about this thing and was biased in favor of it. Greatly, in fact. Somebody who I really respect recommended it to me and the review I'm writing wasn't even imaginable when I bought this and switched it on.

Setups Compared 

iPad Mini Retina -> Superlux HA3D -> HD 650

Asus STX -> Superlux HA3D -> HD 650 / 598

Asus E1 Muses -> Garage1217.com Project Ember 1.0 -> HD 650

Setups From Memory

Asus STX -> Garage1217.com Project Ember 1.0 -> HD 650

Sounds close to the E1 Muses / Garage1217 pairing. Maybe a bit different. But not that far. Both are pretty good. But again, they are in different price brackets. And honestly I don't believe even an iPhone DAC is a limitation.

iPad Mini Retina -> FiiO E12 -> HD 650 

Asus STX -> HD 650

iPad Mini Retina -> HD 650

MacBook Air Early 2014 -> HD 650

BRIEF

Superlux HA3D disappoints. However, It trounces the Fiio E12 in terms of transparency, resolution, clarity and details. But it still loses out to the Fiio E12 in producing a smooth and non-rough sound. 

Between the Fiio E12 and Superlux, it comes down to preference. However, the Superlux is technically superior and far more powerful, in fact way too powerful.

Actually, details are excellent. It may even compete if not beat the Ember in detailing, at least partially, not sure though. Didn't test long enough. However, I would any day take the STX amp over the Superlux as both are neutral and transparent and detailed, but the STX is smoother, less rough and more enjoyable.

The Superlux, It has enough gain and does go very very loud. So loud that it is infact a con as there is nearly no travel available with the volume pot. 

IMPRESSIONS

There is a certain roughness to the sound. There isn't any grain in the conventional manner. But the sound is a little rough and coarse. It doesn't have the smoothness of my AVI speakers or the other setups I have ever heard. 

Even my hybrid tube amp sounds cleaner and smoother in comparison. The sound signature isn't that different but my other amps are cleaner and much more refined. Even the Asus STX jack. The Fiio E12 of course isn't better than the Superlux except for the fact that it is smooth, but not very clean either, and definitely not more refined than the Superlux. Not sure which is more refined between the Fiio and Superlux, didn't test the Fiio again.

There is no distorting in the form of crackling but it just doesn't seem to be able play the HD 650 with any smoothness or refinement. I say this primarily because of the certain roughness I heard. The bass slam and stuff is just fine.

HA3D has a completely black background. And that is one thing that goes in its favor. 

However, with the exception of a MacBook Air or iPad Mini Retina not being loud enough to power a HD 650, I even preferred those setups to the HA3D if all you want is very soft volume levels. 

And yes I tried several hours of burn in on and off my ears. I tried to get used to it. I took breaks and came back. Nothing helped.

I even tried the HD 598 which sounded absurd out of these, perhaps due to an impedance mismatch issue. Since the Superlux has a 200 ohm headphone out impedance.

Mids

The midrange is a little recessed. Not too bad. But definitely recessed. And it isn't involving. It is clinical. And I say that as a bad thing. I have tried the headphone jack of Asus STX and FiiO E12, neither is anywhere near as loud, but both are better in this regard. Either is more engaging. And even AVI speakers are far better than this in this regard. In fact, I like clinical and analytical, but this isn't that good compared to other setups I have, trust me!

The Fiio is in the same league as the Superlux actually, with both having their strengths and weaknesses. The STX is better than both.

Highs

The highs are slightly harsh. And they don't sound that natural. Just rough. Again, I know I am emphasizing this, and I believe I may be overdoing it. Because in this price bracket it may be very good actually, but I have no idea whether that is or isn't so. The roughness isn't that over emphasized, but that is one of the only drawbacks this HA has.

Bass

The bass is tight and good. No major issues here. 

Soundstage

The sound stage isn't as good as Ember, but no major issues here either.

ON THE PLUS SIDE

The biggest plus is it manages to totally unveil the HD 650. Maybe better than most/all setups I have heard, by a small but audible margin. However, at the same time it does make it sound rough, coarse and sorta unclean and very slightly harsh, which is absolutely unlike the HD 650 is meant to behave. 

It is built like a tank. And I mean it when I say it. 

It isn't very heavy. It is portable, not pocketable but transportable. It runs on 2 AA batteries. 

It can power 3 headphones at once each with their own volume controls. 

It has a good many forms of inputs and outputs and even accepts XLR input. 

It also runs on DC electricity. I tried it on both by the way. Batteries sounded better to me but not 100% sure there, might be placebo, not sure.

ALBEIT

Lower impedance phones like the HD 598 sound even worse compared to what I described above. And 32 ohm / IEMs will probably blow up even with the volume at the lowest setting. 

It is very very loud. So loud that I would consider it a con. 

I agree it has its own unique USPs that no other amp especially at this price range, has. 

However, sound quality is something where it underperforms. Especially when you compare it side by side to better stuff, including the STX headphone jack that may not be a big upgrade over it but is certainly far more enjoyable. 

BOTTOMLINE

I'm sending my unit back to Amazon.com. Partly because I already have 3 SS amps and one hybrid amp, and I have no intention of adding just another SS amp to my stable. Under $99, it may be very good/okay, not sure, but I don't need it right now and I don't love it enough to add it to my stable. 

I'm glad I have that privilege without losing much money that I spent. 

Do NOTE:

Other setups sound far closer to each other than to this one. The other setups above are not identical but given a similar volume and all that, they aren't night and day from each other. 

This unit is a significant step lower than the others (maybe except the Fiio E12)

It may be able to compete under USD 100, especially for those who want to go loud with difficult to get volume out of headphones. But it surely doesn't do neither of my headphones justice. 

And I'm a believer in the fact that most transparent DACs are kinda indistinguishable. Most amps are sorta close unless there is a sound signature difference or unless one is poorly designed. Cables don't make a difference. 

If you want to get the most our of your headphones, a FiiO E12 isn't very good but it definitely makes the HD 650 loud enough and is far smoother. Not as clean or transparent as this, but smoother and more musical. And of course there are probably several better amps than this like O2 and many others perhaps, not heard the O2 though, so no idea whether the Superlux is better or worse.


I'd say between the Fiio E12 and Superlux, it comes down to preference. The Superlux is technically better but doesn't have Fiio's smoothness or musicality. However, when it comes to the Asus STX, it is definitely a step up from the Superlux. And when talking of Project Ember or Muses, then there isn't even a comparison.

CURRENT GEAR

Home HiFi
AVI ADM 9RS

DACs
Asus Essence One Muses Edition 
Asus Essence STX 
iDevices 

Headphone Amps
Garage1217.com Project Ember Hybrid Tube Amp 
Asus Essence One Muses Edition 
Asus Essence STX
Fiio E12
iDevices

Headphones
HD 650
HD 598

Earphones 
Philips SHE3590BK

GEAR I ONCE HAD

Home HiFi

Aktimate Mini+

Aktimate Micro

Swan H5

Swan M50 2.1

Swan M10 2.0

Audioengine A5

DACs

Asus DX

Headphone Amps

Bravo Ocean

Fiio E11

Fiio E5

Headphones

Sennheiser RS 170

Sennheiser HDR 180 with TX 170

HD 439

Pioneer SE-A 1000

Earphones

Soundmagic E80S

Monster Turbine 

Soundmagic PL50

Sennheiser CX500

And many more!

Sennheiser HD 650 v/s HD 598 Review

I love both HD 650 and HD 598. And I'm here to show you the real picture of both these headphones, and to a lesser extent the HD 800. This is a NO BS comparison cum review and I know Head-Fi is going to screen in agony as I write this.

I have owned and used HD 650 and HD 598 quite a bit. I have also owned and sold HD 439, HDR 180, RS 170, Pioneer SE A-1000, Monster Turbine IEMs, Soundmagic PL50, Soundmagic E80s and numerous others.

I have tried but not owned HD 800, LCD2, K701/702 (not sure which one it was) and HD 518.

Headphone Amps Owned:

Bravo Ocean
Garage1217 Project Ember with numerous tubes/settings (HD 650, HD 598, HD 800)
Asus Essence One Muses Edition (DAC cum AMP) (HD 650, HD 598, HD 800)
Asus Essence STX (HD 650, HD 598)
iPhone 5s/iPad Air/iPad Mini Retina (HD 650, HD 598)
MacBook Air Early 2014 (HD 650, HD 598)

Headphone Amps Tried:

Lehmann BCL
Beta22

DACs Owned:

Asus Essence STX (HD 650, HD 598)
Asus Essence One Muses Edition (DAC cum AMP) (HD 650, HD 598, HD 800)
iPhone 5s/iPad Air/iPad Mini Retina (HD 650, HD 598)
MacBook Air Early 2014 (HD 650, HD 598)

DACs Tried:

Gamma22 DIY DAC

Busting The Famous HD 650 Myth - Is It Really Hard To Drive?

All that is Audiophile BS!

It isn't hard to drive.

It sounds just fine out of an iPhone or MacBook Air but the volume just isn't there. Also, the inbuilt DAC is as good as it gets. But iDevices don't have the voltage or current to drive a phone like HD 650 sufficiently. So even at low volume there is clipping resulting in audible and measurable issues.

At very low volumes you're okay but there is still clipping as there is no reserve. You definitely don't need to change the DAC.

All you need to do is get a powerful amplifier (read powerful, not expensive): that is powerful and transparent, to provide enough clean power. Something like a Superflux HA3D or Objective2 is more than enough. A FiiO E12 isn't enough and it also colors the sound audibly, so I won't recommend that.

As long as you can a good enough amp that is transparent, a HD 650 will sound as good as it gets. Unless of course you're talking of coloring the sound, tubes, placebo, volume changes, clipping etc.

An Asus STX headphone jack is way more than enough to drive HD 650 to its full potential. An O2/ODAC should audibly be similar as well. And so will other expensive systems like Benchmark 1 and Violectric amps. Everything else is either color/distortion, clipping or plain placebo!

Audiophile AMP Myth Busted!

Audiophiles feel an amp is supposed to change/affect the sound. Wrong!

It is supposed to be a wire with gain, to amplify the signal, i.e. make it louder.

I accept most amps in the market do color the sound, but that isn't what an amp should ideally do. And a lot of non sense out there is plain placebo. Whether you like it or not.

Color = Distortion. Period!

As long as you have the correct amp for a headphone (this isn't synergy but there is a measurable science behind this), and you're not clipping and of course the amp must be audibly transparent, all of those amps will sound the same.

To get the volume equal you need to use a Millimeter. Doing it by ear or by a sound level measuring device is non sense.

As far as the HD 650/600/800 are concerned, all the below amps should sound more or less the same, if not absolutely identical:

STX
O2
Benchmark 1
Vioelectric neutral amps

Although there is more to this than merely output impedance, but a good rule of thumb is that for a dynamic headphone, if your amp's impedance is less than 1/8th that of your phone, you'll be fine.

The STX has an impedance of 10.7 ohm. So phones that are 80-100 ohm or more will be just fine.

HD 598 is 50 ohm I think. So technically there will be a sound signature change with slightly more bass and slightly less treble, and audibly so. But thankfully I have tried a HD 598 with it and it is fabulous indeed. Not as much as the HD 650 of course. :D

O2 and a Benchmark 1 have impedances below 1 ohm. So they can pretty much run any phone out there.

And this rule doesn't apply to planar phones like LCD2.

And then of course there are some exceptions that require too much voltage/current like HE6, K1000 etc.

The STX and O2 are fine for HE6 as far as measurements are concerned. From what I've read by other science people, that is. For K1000 - No!

Transparent = Transparent wrt the audible domain

If two amps are audibly transparent, they will sound the same minus placebo, irrespective of one being better or vice Verma.

If one is colored/warm/bright etc, of course there will be a difference. But a very slight one. These differences get exaggerated out of promotion. Even a colored one may often be difficult to tell apart in a Double A/B Blind Test.

Audiophile DAC Myth Busted!

Transparent = Transparent = iPhone/ ODAC / STX / AEX / MacBook = Same

Colored = Distortion = Slight Difference = Muses/ Android phones (I jus got heard Moto G 2014 though)

Colored DACs may sound slightly different. But that is distortion. Not hi fidelity. That is not how a DAC is supposed to be.

A DAC isn't supposed to have a sound. If it is audibly transparent, it sounds the same. End of story!

An iPhone DAC is good enough for any application in the world. It is that flat and transparent.

HD 650 v/s HD 598

A HD 650 sounds better than a HD 598 even out of a MacBook Air. But the MBA amp isn't powerful enough to do justice to it let alone making it loud enough. It is okay though, but not ideal. But it is 100% transparent and clean.

An STX or O2/ODAC or Superlux HA3D/iPhone is as good as it gets.

Everything else is either placebo or color, and it is mostly placebo.

I have been a victim of this placebo thing for years as well. No more!

If you have enough volume without color/clipping (this is hard to say without measurements) you're doing great!

The HD 598 is great.

But the HD 650 is a small but clearly audible jump across the board. With the only drawback being that it is a bit darker but nevertheless more natural and refined.

The HD 650 is as good as it gets under USD 500-1000 once you take into consideration comfort, warranty, sound etc as well. Of course the LCD2 is a big jump in terms of sound, but the HD 650 is far more neutral (I'll explain soon) than a LCD2 at least, perhaps not in absolute terms. And the LCD2 is a pain to wear.

Under USD 500, HD 650/600 are undisputed kings. Beyond USD 500 it may become debatable. And of course although I have not tried the HD 700, I'm sure it should be a decent jump over the HD 650/600.

Don't compare to phones like K701/702 or DT 880. There is a reason the Sennheiser is more expensive and sought after.

The ear doesn't hear sound like a flat Frequency a Response. So no matter how you find the FR curve of the HD 650, that doesn't make it overly dark. That is probably the curve followed to an extent by the ear as well.

Of course HD 600/700/800 might be a slight touch more neutral, with HD 800 being on the bright side of neutral.

Treble:
HD 650 is better than HD 598 but only where treble is truly required. HD 598 is livelier and more fun otherwise. And far better to the untrained ear. And I do agree HD 650 is slightly dark, so perhaps not for everyone. But it is possible to get used to it and even enjoy its natural sound.

Bass:

HD 650 is louder than HD 598 in bass. Both are tight. Pretty tight. HD 598 is a tad tighter. HD 650 is a tad softer. Neither is bass heavy/light. HD 650 is definitely softer and with more rumble I guess.

The tightest I heard the HD 650 was with a Beta22. But it wasn't neutral. It was warm. No doubt. Far from transparent.

Mids:

HD 598 is mids forward. HD 650 has magical lush mids. Need I say more? Ya, HD 650 is slightly better.

Comfort:

Both are great. In their different ways.

HD 650 v/s HD 800

HD 800 is slightly more detailed, refined and with more treble. But when you compare them side by side.

I compared them with Muses and Project Ember (not STX, just for those naysayers).

They are very close. HD 800 is better. But HD 650 is slightly more natural.

The difference is far less than people make it out to be.

The difference is similar like that of going from a HD 598 to a HD 650. It is there. But not night and day, irrespective of the amp/DAC.

I've even tried a Beta22/Lehmann BCL, just to shut people up. :P

If I had the money, I'd take the HD 800 in a heart beat. But I don't. And the HD 650 is close but not quite there. So it is well worth the price as well.

And although I've not tried it, the HD 800 runs just fine out of a STX. My friend has tried one with a STX and an Essence One and there wasn't much difference unless you try to start nitpicking, and there isn't much difference even then.

A FiiO or iPhone amp is of course not capable of running the HD 800 though, with the exception of FiiO desktop amps perhaps. Won't comment on that though.

But the HD 800 is definitely a superior phone and I'd definitely get it if money wasn't an object. But a HD 650 is a close rival, though in a slightly lower league.

Comparing the below setups:

Asus STX amp and DAC
Uncolored and transparent

Asus Essence One Muses Amp and DAC
Thinner, warmer, slightly looser bass but colored. Slight difference, so some people might prefer this DAC, especially with something like a HD 800

Asus Essence One Muses DAC -> Project Ember
Closer to a STX. Slightly more SS. Perhaps a slight difference. The mids may be a bit lusher and wet. But very close and I didn't do a AB test so I may be talking BS. Very close.

Asus STX DAC -> Project Ember
Again, not sure if there is a difference or not. But definitely not a huge difference.

They are all bloody close!

I wouldn't say they are exactly the same. There are differences. But they are close. And it is definitely not an easy task to rule out one better than the other based on listening, because it is a matter of taste/preference.

But according to measurements and science, STX is flat and transparent. The other setups are not.

So if you want Benchmark level fidelity, go with STX. And I can assure you the difference between those systems, even if very slightly audible, isn't huge. And often/mostly placebo. Just like I was a victim of placebo for years.

Honestly, anything over an O2/ODAC seems non sense to me.

And an STX is just as good for most people I guess, unless you're into low impedance non planar phones or IEMs.

Other Asus products like U3, U7, Muses etc are colored and technically worse.

You're fine with a ST or STX though. Not sure about STX II. Not sure whether the difference is placebo or color. But not heard it. Just read about it.

And I hope you realize non sense about cables, power leads etc is just that, non sense.

Some NO BS links that will probably help you in more research:

http://hddaudio.net/bb/index.php

http://nwavguy.blogspot.in

https://www.hydrogenaud.io

http://www.head-fi.org/t/486598/testing-audiophile-claims-and-myths

http://www.head-fi.org/f/133/sound-science

http://hddaudio.net/bb/viewtopic.php?id=9254