Sunday, July 26, 2015

The Sony NWZ-A17SLV: The new face of the Walkman

The A17 is an interesting offering from Sony, obviously throwing down a challenge to the Fiios and the iBassos, and shall I say it...the Ponos of the world?

On the surface this is a great looking DAP. What you are really paying for here is Sony's expertise in the audio industry, with their proprietary hardware and firmware tweaks.

Sony has a great track record, from the original Walkman on. Some super hits (the NWZ series of DAPs), some gear that is absolutely stratospherically good (the PHA2, XB500/700/1000) and even some iconic cult classics (the MDRR10, even the TPS-L2).

But more than any other audio manufacturer (yes, including HiFiman!), Sony has broken my heart. I can forgive them the tizzy MDRZ7 and the surprisingly clunky and redundant UDA1/S, but the internet-connected NW ZX1 really took the cake. I lusted after it for months, couldn't wait to get my hands on it, had dreams about it, and then when I finally nabbed one, it was a huge disappointment, mainly because it had an excessively high noise floor. For the price, it wasn't just a trivial nagging background hiss, it made music literally hard to listen to on some of my more finicky IEMs.

But I didn't learn my lesson (and a very expensive lesson it was too) with the ZX1, I went and checked out the A15. Another gorgeously built device from Sony with all the usual Sony bells and whistles, but no internet connectivity, an interface that made even the crappy Fiio X3 interface bearable, and, wait for it, the dreaded hiss.

You would think I had learned my lesson, but then alas I started lusting after the A17. Third time is a charm, I said to myself, they would surely get it right this time, right?

So what is the A17 all about?

It's not internet enabled, though, like the ZX1 or ZX2 are. And it doesn't run Android but a version of the old Sony firmware that I have become familiar with since my NWZ-S616 days.

It does allow you to play almost every audiophile format you can throw at it, including flac and alac and aac (thankfully no ATRAC!), although it doesn't support DSD. Which is not surprising, because how many DSD songs can you get into that 64GB memory? Four? Five?

You can extend memory with a 128GB SDXC card though, although that adds to the cost. But you have to admit that 192GB is plenty of shelf space even for the most die hard audiophiles (you know the ones that are cybernetically connected to their 1st gen iPod classics).

Battery life is the bane of these devices (except my trusty old Cowon D2, which has the kind of battery life you would expect a nuclear powered aircraft carrier to have) but the A17 manages a healthy theoretical 50 hours. I say theoretical because when I was trying it out, it lasted only about 20 hours or thereabouts. I have no idea if that is par for the course or not.

I'm typically not a fan of the gimmicky digital processing that Sony does, for example DSEE, but its amplification design for the A17, including the so-called HMaster HX digital amplification, is on the money. Check out how Sony implemented the amp topology, its pretty cool, for example they used a POSCAP capacitor as the charge pump.

The interface is more intuitive than the crap on my Fiio X3 (Sorry X3 fanboys, but you know that even with the firmware update, the X3 interface is, well, crap) but it is still somewhat clunky. The screen is tiny but well illuminated (OLED?) but even though you can view video, i wouldn't use the A17 as a video player any more than I would use it as a smartphone.

Overall the sound is remarkably neutral. Highs are crisp (something I found lacking with the ZX1) and detail is superb. The only minuses are that it struggles to power even moderate impedance headphones, and there is an irritating hint of a hiss with exacting IEMs (floor noise is what killed the ZX1 for me as well). Which is frustrating, because if you can't pair audiophile DAPs with something like the Shure SE535 (which is great but nitpicks when it comes to floor noise) then what would you pair it with?

And the A17 struggles even with moderate impedance headphones with its 10mW per channel output, so it's really not an option except for portable use.

I suppose the A17 should be on the shortlist for folks looking at a standalone DAP, and I do prefer it to my Fiio X3 (which is languishing in a drawer somewhere because every time I use it I end up more irritated than happy). And
if you don't have prima donna IEMs that act like divas when it comes to amps, then the A17 may be a great choice. The S-Master HX topology is actually very cool and innovative, Sony DSEE is one of the fre implementations of digital sound enhancement that does not strip the music of its soul, the battery runs for longer than you would expect (around 30 hours by my reckoning), plus it charges quick too, the max of 192 GB storage (64 internal + 128 addon) is enough for any audiophile (at least for now), and the build quality is excellent - it just feels solid and right in your hand.

But the damn hiss makes your mambo sound more like a mamba. It makes me wish that Sony included Riki Tikki Tavi in the box with every DAP they sold to me.

And there are three more compelling reasons to pass on the A17.

First, from a price performance perspective its hard to look beyond the Fiio X1, or even the Sony NWZ-E385, which doesn't allow lossless files but then how many people critically listen to flac files when they are on the go anyway?

Second, the lack of internet access is irritating, because most of my on-the-go music now comes from streaming services. The A17 does have Bluetooth streaming though, but I did not test it.

But third (and probably most tellingly), it still doesn't demonstrate a compelling advantage over my Cowon D2, which has been my DAP workhorse for a long time now, mainly because I can't find anything better
But oh yes, one thing I learned during my time with the A17 is that it has an FM tuner.

Who knew FM radio still existed?

Sunday, May 31, 2015

My ear hurts!

Q: I love using my IEMs, but recently my left ear has started hurting with maybe a little blood when the IEM is in there awhile and I take it out. What should I do?

A:  Pain and bleeding could be from a poor fit, rough IEM shell, or even a problem with the external ear itself.

If you have pain or discomfort from your IEM, that's not normal. And certainly bleeding isn't either. Stop using them. Get something else. Consider seeking medical attention. The bleeding is literally a red flag. 

Saturday, May 30, 2015

Scratchy Aune

Q:  Whenever I turn on my Aune T1, I get serious distortion/static for the first 20-30 minutes until it fully warms up. I've tried several different headphones, I've tried leaving cans plugged in when I turn it on and I've tried waiting until after the T1 turns on to plug in. 

Nothing seems to make a difference, everything is static-y and awful sounding for the first 30 minutes or so, then it'll slowly go away and sound fine.

Am I doing something stupid, or do I have a faulty amp?

A: Try cleaning the tube contacts and rods. Isopropyl alcohol or (even better) Deoxit will work.

If your Aune T1 still sounds scratchy, try swapping the tube.

If still an issue, the finger of suspicion next points towards your PSU brick.

Friday, May 29, 2015

Hifiman HE 560 rattle

Q: I just got the Hifiman HE-560s and I noticed that one of the grills gives in a tiny bit. It barely moves if you apply pressure to it, but I can't push the other one in at all. I don't hear anything wrong but should I be concerned?

A:  A loose grille will only be an issue only if it vibrates. try running a bass shaker test, like the one here.

If the issue persists, you have two options. Option one is to engineer a DIY fix and batten down the grille with some glue or epoxy. Option two, and the one that I would probably pursue if you just got your headphones, is to contact Hifiman customer service, and also the retailer who sold you the headphones, to see if you can swap them for another pair.

Thursday, May 28, 2015

Buying used headphones

Q: Should I  be worried about buying used headphones?

A: Veni's 3 rules of used headphone purchasing:

Rule 1: If the seller does not answer questions appropriately, send you decent pictures of said headphones, and overall sounds like he/she has no clue, then pass.

Rule 2: Don't buy modded headphones unless you are absolutely sure that the person who modded them knows what they are doing. It is easier to kill a pair of headphones than Mel Gibson's movie career.

And Rule 3: If you don't smoke, don't buy used headphones from a smoker. It will take more effort than it is worth to get rid of the smell.

Wednesday, May 27, 2015

Aune T1 tube rolling tips

Q: What tubes should I get for my Aune T1?

A: A common-sense rule of thumb is: don't spend more on your tubes than you did on the amp :-)
in general NOS (new old stock) tubes are better choices than reissues, but some NOS especially Amperex and old Genalex tubes can get plenty expensive very quickly.

Many resissue tubes are manufactured by New Sensor Corporation, and their price may be dramatically marked up by tube stores. When it comes to buying tubes, patience is always a virtue, especially when it comes to deals!

Tuesday, May 26, 2015

Would you ever buy a first batch of headphones?

Q: Would you ever buy a first batch of headphones? Is it worth it to wait?

A: Buying a first production run of any engineered item, whether it is a car or a pair of headphones, is always associated with a slightly higher likelihood that you'll get a product that has some issues.

Typically large companies manage QC well, so the issues are more likely to be because of design flaws than QC, although anyone assembling anything in a factory can have a bad day and screw up their job (and your product).

And yes, verification & validation testing does not catch every flaw, and since everyone who makes anything iteratively improves design over time as production ramps up, it always makes sense to wait for a product that has had the flaws "shaken out of it", so to speak.

I like to wait before I buy new audio gear, but more for the hype cycle to die down and some credible information to bubble up more than anything else, including reliability.

But I have this inner Klingon in my head who has zero patience and does not listen to reason, and he often jumps out when he sees me looking at desirable stuff and forces me to buy it the moment it is released

Sometimes I regret it later. So I curse the Klingon in my head, and he usually replies with "Hab SoSlI' Quch!"