corresponding to the digital connection and iPod / iPhone / iPad
Support USB Audio (96kHz/24bit)
High sound quality of analog circuit thorough
With high quality DAC, op amp, the headphone amplifier
Die-cast zinc damper
Gain selector switch
Bundled Silicon Belt
|Sony PHA-1 Headphone Amp|
Sony PHA-1 Headphone Amp
- Average User Rating:
Recent User Reviews
Pros - looks amazing, built like a tank, gives your iOS device new life
Cons - Battery, no proprietary carry case
This is a amazingly looking device, it does not matter how you look at it, it is simply a pleasure to look at. That is the first impact that one have once you look at it, it calls your attention, I even make a point of not keeping it visible when I’m on the go. (I don't live in a safe country). It screams awesome all over it, it must be the best looking portable AMP/DAC I’v seen to date.
The build quality is second to none, the level of detail and attention is beyond the expected for audiophile items. Many expensive audiophile toys (not that the PHA-1 did not hurt my wallet) are purely based on sound quality and day by day occurrences are overlooked, some are even straight from shelf cases. This is not the case with the PHA-1, there is a level of care that is clearly seen on the design.
The PHA-1 has rubber built in feet, so it does not slide around nor scratches your table, also protects your investment. The front panel, volume knob and connections are protected by hook guards so they are not disturbed once in your pocket/bag. Finishing on the materials are stunning. Proprietary rubbers are a cool unique little touch. Good resistance and feel to the knob as well.
It comes with:
- 4 rubber bands (proprietary design)a standard line cable with 90 degrees jacks, about 5 cm (imperial measurements are useless deal with it)iPod/iPhone 30pin connector to USB, about 10 cmMicro USB cable of 1mSony walkman to line cabe with 90 degrees jack, about 10cmA rubber mat so your audio source is not rubbing against the metal once coupledUseless documentation
The weight and solid feel adds to the premium overall experience.
The PHA-1 is rated at 5 hours as a iOS DAC and 10 hours as a pure amplifier. And so far it has delivered what it promises. Some may argue that 5 hours of playing is not much, and I agree. But personally I seldom listen to more than 5 hours of music on the go. And as these days smart phones only last one day I don't mind adding another item to charge with my iPhone and iPad at night.
That been said I will have a long international flight coming soon. So instead of using the DAC I will use use my line out cable. Problem solved. Once in a while its not a bad thing to change things a little.
This amp can be used as a:
- Amp with a line inputPC or Mac DAC/AMPiOS DAC/AMP(I don't know if it works with android, please someone let me know?!?!)
Unfortunately it does not support line out, this can be a let down to many people, I also wish it was an option. The PHA-2 does support line out, be aware it is substantially more expensive.
There is a GAIN switch from LOW/HIGH impedance headphones. The PHA-1 is rated to support 600 ohms headphones. However, to be noted that people have reported not been able to drive headphones that high in impedance. I personally don’t have headphones that heavy to test.
As a iOS DAC and AMP
It adds a clear accuracy to the sound, specially on the highs. Quick cymbals are well defined, a clear resolution improvement over the stock iPod.
The PHA-1 has sonic characteristics that brings more life as well, it brings the upper range of the mids slightly forward. It also adds a little more bass, not too much, but it rounds up the signature quite well.
By the fact that mids are forward and very well defined they add loads of fun factor to the table. I use it very often with my Shure SE535, and as amazing as the 535s are they can be a little clinical, the PHA-1 fix that right away. Same goes for my Shure SRH840 (even more clinical than the 535s).
It delivers loads of power as well, my most demanding headphones are the SRH840 (granted not that bad) and i use them at about 25% on the low gain setting.
The sound is also crystal crystal clear, its noise floor is much lower than any desktop amp I have used. Even cranking the volume all the way up on my IEMs while no music is been played there is almost no hiss, a marvelous engineering achievement. I cant stress enough how quiet this amp/Dac is.
As a Mac DAC and AMP
Almost the same characteristics as if plugged into a iOS device. I do think that they use a different DAC chip while connected to a computer, as the low frequencies are not as forward as on a iOS device.
The resolution is still amazing, because the lows are not as forward, the crispness is even more apparent. I would say that it is almost too much brightness to some extent, as sometimes I fell the need to have some more warmth, specially on acoustic songs. That also been said it is not a bad sound in any way, I personally don't like a all that bright sound signature.
The PHA-1 is a great product, as the cheapest of the iOS supported DACs it holds its ground proudly against the more expensive competition. The fact that it is also a powerful Amp and a Mac/PC DAC it even adds flexibilities that the competition does not support.
The build quality is exactly what one would expect from SONY, and it looks and feels amazing as well. The battery can be an issue, specially if used as a mobile device DAC.
The sound characteristics are extremely pleasing, I would say that the PHA-1 is more directed to a fun experience opposed to a monitor tool. But that is expected from a mobile device.
Gear used on testingHardware:iPod classic 7th generation 160GBiPhone 4Custom HackintoschSchiit ModiSchiiit MagniHeadphones:Shure se535Shure srh840Grado sr80iGrado sr60iGrado sr225eEarPods (just kidding, LOL)
"A Great iDevice DAC/Amp That Is More Within Budget"
Pros - Great form factor and brilliant design, very solid build, great versatility in function, enjoyable and laid back sound
Cons - channel imbalance at low volumes, no line out, battery life, lacks a little detail
The Sony PHA-1 is a great option in the few selections that one has for idevice DAC/Amps. Its been around for over a year now and with the news of the now released PHA-2, the predecessor of the PHA-1, the price of the PHA-1 has dropped quite a bit. For a while it hovered around the 400 dollar price point, but now it can be gotten around $330-350, making it one of the most affordable options for the idevice dac/amp. Having had these for a little over two months now, I thought I'd give these a little love and share my thoughts with the hope that, just because the hype is currently around the PHA-2, this nice little device wont be forgotten.
I'm currently running these with my Asus zenbook via USB, iphone 4S, or ipod classic gen 7 as source via LOD to the PHA-1 with a toxic cables silver poison LOD to USB cable, with heir audio magnus cable to my beloved Aurisonics ASG-2 iem.
I've tried a few idevice dacs or amps, more precisely the Fostex HP-P1, V-Moda Vamp, and the original algorhythm solo (still hoping to try the hifi m8 and theorem 720!). In terms of design, the sony is still the best, and honestly by quite a HUGE margin. Every little thing that sony implemented on these is really just better than its competitors.
The little rubber strips that run along the top and bottom of the device prevents the housing from rubbing against the table or the DAP it's attached to. It also stabilizes the device and keeps it in place.
The protective silver chassis that protects the volume knob and the input and outputs, often called the "roll cage" i believe, though annoying to some, is also a well designed extra bit of protection for the device. I've heard that they can be removed if someone is really that against them but Ive never had a problem with them myself. They really add extra protection to the front of the amp and theyre very sturdy. Its clear that that volume knob is not about to get touched by ANYTHING.
Another great design, and probably the coolest, and in some ways, the most "revolutionary" aspect that this amp brings to the market is its rubber clasp system. Instead of rubber bands that are sometimes hard to get around both the amp and the DAP, they created a clasp system that Im sure most people are aware of. The amp has ridges on the side that locks the rubber strips in place, and one simply has to put the strip over the DAP and lock the strip in the other side of the amp too and the DAP and amp will be bound nicely together. Its MUCH quicker and easier to use than the traditional rubber bands.
Another great freature of the PHA-1 is just how versatile it is. It is compatible with idevices, walkmans, and many DAPs. Along with that, its also compatible with PC or mac and acts as an external USB soundcard. Of course, more and more devices are becoming more versatile, but very few compete with the price that sony currently offers with the PHA-1 (for example, theorem 720 and hifi m8 both being over double its price).
One gripe i do have to mention is the lack of a line out. I dont think the PHA-1 offers an option to run a signal from the internal DAC directly out to a different amp. I really wish that was possible.
One other thing to mention is the channel imbalance for sensitive iems. And yes it can be a deal breaking problem for some unfortunately. With my ASG-2, which are fairly sensitive, i did have channel imbalance problems as i tend to listen to music at lower levels. But after implementing soundcheck on my itunes and my iphone 4S, the overall volume of the music decreased and i was able to turn the volume up, which eliminated the problem completely. So possibly a problem, but not something that cannot be solved (really hoping the PHA-2 is be different).
When it comes to design, i feel like sony pretty much nailed it in almost all aspects besides a few small complaints.
Battery life is where i wish sony could do a little better. These have respectable battery life, very much on par with other similar products on the market. But for an international traveler who has to fly from Taiwan to the east coast of the US, a trip easily up to 20+ hours, the 6 hour battery life on these, or ANY idevice DAC/amp for that matter (except for the newly introduced theorem 720), is simply not enough. They are enough for my drives to Chicago but im still hoping for an improvement in battery life.
Some amps will suffer from EMI especially when theyre being paired with a phone. Never had a problem with the Sony PHA-1. Absolutely none. Please do share with me if you experience EMI with these.
And now we get to probably the most important part of anything on this website. How do they sound? I can say with a bit of confidence, that theyre pretty darn good at their current price!
Switching from the audio jack from an ipod to the PHA-1 is a pretty clear and obvious difference. Soundstage is very much expanded with much more 3 dimensionality. Detail retrieval is on a different level, and the dry, cold, sound of the iphone is replaced with a much smoother and enjoyable sound.
The overall sound of the PHA-1 can be described as being relaxed and laid back. A sound that's very easy to enjoy, and with a very nice and dark background.
The sound of the PHA-1 is very neutral. No frequency stick out in particular to my ears. Bass is precise and has great depth to its slam, mids are smooth and flat (could as for a little more refinement), while the treble gives good detail but are never aggressive (just to sum it up real quick).
Soundstage is nicely implemented. Its fairly 3 dimensional (though not quite at the level of the HP-P1) with great width in particular. As stated earlier, the sound is more laid back, and instruments are further away than Ive become use to with the previous iBasso amp that i was using. I personally feel that the vocals are often just a little too distant and can lose a bit of intimacy and get mixed into the background. In particular though, that's more of a problem at lower volumes. Cranking up the volume knob eliminates the gripe i have of that.
Imaging is good but not stellar. Instrument placement and separation are both excellent, but I could ask a little bit more from the precision of the instrument placement.
The detail retrieval, also stated earlier, is a good step up from the ipod. The sound is much cleaner than an ipod, much less congested, and also much smoother sounding. The complexity with drumming and guitar in power metal for example, is very well defined and clear sounding with the PHA-1, while the ipod falls behind by a large margin. Comparing again to the HP-P1, which is my favorite of idevice DAC/amps that ive been able to try, its still not quite there in comparison however. With an MSRP originally of 600 dollars, I really wish that these had detail that is almost on par, if not on par, with the HP-P1. But remembering that theyre currently priced below 350 dollars, all I can really do is tip my hat to what it can do at the price that its now being offered at.
The PHA-1 is a great amp that offers a lot of versatility with great sound at a price that is much more attractive than many of the other products that fit a similar niche. At the MSRP of 600 dollars, I really dont know how i could recommend these. With the likes of the fostex HP-P1 with MSRP of 650 dollars and the Hifi M8 being well regards for 700 dollars, I dont see much competition or demand for the PHA-1. But now cut the price of the PHA-1 in half, and suddenly you have a deal that cant be ignored.
The Sony PHA-1 with its flexible number of uses, amazingly well thought out design, and good sound, fulfills a role as a strong contender as a mid tier idevice DAC/amp with a great price, or any DAC/amp for that matter, and I would absolutely recommend it. I definitely hope that people will still consider it as an option despite the presence of the PHA-2.
"Great mid level digital amp, but weak analog amp."
Pros - Great value for a medium level portable amp with asynchronous USB support.
Cons - (Weaker than usual analog amp even the spec said otherwise.) - Ignore, it was my F807's fault not the PHA-1
Update: it turns out to be my F807 having a rather weak line out and not the fault of the PHA-1. Therefore please ignore my comments about the gain issue and I am bumping up my rating from 3 to 4.
Ok here is my take on the Sony PHA-1 along with their F806 Walkman and the Sennheiser Momentum, and to be honest, I think some of you may not like it…
Here is a bit of background, the PHA-1 is MSRP at $600, but I paid for mine at $400 from Amazon, and this is my baseline on judging its value. However, most of you should able to find it for around $350 if shop around.
My bottom line for this little wonder is that it does a good job as a DAC with good amount of features, but as an amp, not so much.
Let’s talk about its DAC first, which is asynchronous and can operates at 24/96, just like the AudioQuest DragonFly (MSRP $250), and they sounded almost identical to each other at the same volume with my V-MODA M-100 during A/B testing. The PHA-1 performs equally well with my iPods compares to the V-MODA VERZA due to the digital amp and it shows.
However, the same cannot be said with the analog amp, which is where the PHA-1 falls apart.
Since the PHA-1 is a Sony product, it supports their Walkman line of DAPs by providing a LOD cable, which I paired with my F806. To my surprised, I LOST volume at low gain by about half using the PHA-1 vs. straight out from the F806. Both of the Sennheiser Momentum and V-MODA M-100 are low impedance cans at 18 ohms and 32 ohms respectably, and they both performed very well with the V-MODA VAMP and VERZA in low gain at 1/3 volume dial. Since the VERZA and the PHA-1 power rating are comparable to each other, I fully expected that power and volume wise they would be similar, which unfortunately is not the same. Compare to the F806 set at 35-40% volume, at low gain, I have to set the PHA-1 to at least 50% in order to get a similar level of volume back. Of course this is not exactly a problem for me, as once I switch to high gain, I can get the same level of volume at 1/3 dial just like my VERZA at 1/3 dial in low gain. However, I foresee problems with higher impedance headphones with this amp in analog mode.
But this begs the question: why would you buy the PHA-1? If you want to use it for your PC/laptop, then the AudioQuest DragonFly seems to be a much better choice as it is cheaper and much smaller; if you want to use it for your iDevices, then at MSRP you can get the Fostex HP-P1, V-MODA VERZA, or the latest and greatest VentureCraft SounDroid Typhoon for even less; if you want to use it for a Sony Walkman or other DAPs that only has an analog LOD, then there are so many better and cheaper alternatives that makes the PHA-1 a moot point. The situation that the PHA-1 will be viable is that 1, you can get if for much less than MSRP; 2, you are moving up from FiiOs and the like but don’t want to pay $600; 3, you want an all-in-one device and don’t have other DAC/AMP that I mentioned or similar above; 4, you want to stick with Sony for your Walkman.
I might seems to be overly critical to the PHA-1 and I think I am, and to be fair at $350 it is a good buy for a DAC/AMP with asynchronous USB at 24bits/96kHz and reasons I mentioned above. And future models and variants will only get better.
One thing that might save me from returning the PHA-1 is that I might work with the F806 in digital mode since that series of Walkman are Android based. I was going to test it but I couldn’t found my female USB to micro USB adapter. However, even if this works, the setup is not going to be pretty, as I have yet to see a short WM-PORT to micro USB interconnect anywhere, plus the V-MODA VERZA officially supports Android and it will be more likely to work with the F806. So if the testing works out, at $350 this will be a great buy for all you F806/807 owners.
I know I left out a lot of other stuff like sound quality, but I think it will not be necessary for me to repeat the findings from other reviews. Feel free to pm or post if you got questions, and I will try to update the post once I get some decent pictures.
Update: I just found out that there is a WM-PORT to female micro USB adapter from Sony model WMP-NWM10 for around $10-$15 bucks, and with this you can make your own interconnect to your favorite DAC/AMP that supports Android. I am going to hunt one down and test it out.
Setup: Top: iPod Touch 1st Gen; Middle: Sony PHA-1; Bottom: Sony NW-F806 plus Sennheiser Momentum.
Silicone soft clips up close. They work pretty well on the rail system. However, it only works on the top but not the bottom, hence the bands for my double setup.
Sony NW-F806 need to connect to the PHA-1 via analog in from the WM-PORT with the included cable. Tested the connection from WM-PORT to the mini-USB port and failed. Technically the PHA-1 support PC connection via mini-UBS, so I was hoping it will work for Android like the V-MODA VERZA. Too bad that I tested the F806 on both and they both failed to connect...
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