The TA-ZH1ES is a great sounding device. Thoroughly enjoyed it whilst I had it. Power output, functionality and price aside, I still preferred the DMP-Z1 tonality to TA-ZH1ES however. I found the TA to sound very smooth and laidback. DMP by comparison sounded slightly more analytical, energetic and exciting. I also heard a cleaner, darker background which led to better instrument separation and sharper imaging on DMP with certain IEM’s.
But there were certain IEM pair ups that I preferred on TA over DMP. qdc Anole VX, Final A8000 and Rhapsodio Supreme Mk2 to name a few.
Ultimately, better specs doesn’t always result in better sound quality. Synergy is king IMHO.
One feature that I absolutely loved with TA-ZH1ES was the PRE-OUT function. I used it with a pair of powered speakers and it was amazing.
The choice of Headphones is always very important anyway so of course, every statement i made was regarding the headphones/earphones i own and use.
To me, the DMP-Z1 doesn't sound as fast as the TA-ZH1ES. I have some songs where, with the IER-M9, you can really hear the TA-ZH1ES is faster.
Its a bit like WM1A vs WM1Z. At first glance, the WM1A sounds a bit more clearer and seems to have more detail retrieval and better treble overall because it is more balanced. The much warmer sound of the WM1Z makes it harder to notice that the WM1Z actually does have the better treble. Its kinda masked by its warmness but with just the right IEM like the IER-M9, you can hear with songs that need good treble, that the WM1Z is better.
And it is similar for me with DMP-Z1 vs TA-ZH1ES. The DMP-Z1 sounds like it is faster at first, but with the right songs and the IER-M9, if you listen closely, you notice that its more complicated.
The DMP-Z1 is more ketchup and mustard if you understand what i mean and i think the reason to this is because Sony tried to make an analog amp sound like an digital. Its as close as it gets and i think its a big part of its rather unique sound compared to other analog amp designs.
At least with the IER-M9 the TA-ZH1ES doesn't sound as exciting at first, but in the bass and especially in the treble, there is more depth. The highs are finer, more satiny but faster at the same time. The bass also has more depth to it and sounds just a tiny bit less compressed, it starts lower on the floor and creeps up spreading out more which make it sound less exciting at first.
The IER-M9 is my main and most important gear i own and to me personally, it shines more with the TA-ZH1ES, especially in terms of bass, treble and layering.
But (imho) the DMP-Z1 still is worth its money and an excellent choice, why not? It is not the worse device but that is not enough for the people who praise it. The DMP-Z1 is not supposed to be as good or different, is supposed to be better.
The DMP-Z1 has to be the ultimate and definitive device from Sony because it is the most expensive according to the people who own it. I mean, of course, they bought it due to that reason. But there are 1000€ Desktop Workstations that are better than 3000€ Notebooks. If you don't have to take any compromise on size/weight, you have more freedom to create whatever you want and often much cheaper. The DMP-Z1 needs to run of batteries because that is the whole deal after all and that causes limitations nobody can deny. Battery power is more limited but also does have its advantages. You get some, you loose some.
But batteries enable the DMP-Z1 to do things the TA-ZH1ES can't do.i just don't see it as the definitive device, that doesn't mean its not worth its money, nor does it mean it is bad or something similar.
And the interview, imho, showed exactly that. The guy asked "Why didn't you use the D.A. Hybrid Amp" and the answer was not "Because this is as good", the answer was "Because we couldn't, the batteries don't have enough voltage". That is key to me.
The separation of the two boards, the Alps Volume poti, those are all things that are needed because the DMP-Z1 uses an analog amp. Those are solutions to an problem the TA-ZH1ES doesn't have. The DMP-Z1 sends an digital Signal to the AKM DACs, and they output an analog signal that travels through several components inside the device while being analog and when it reaches the analog amp, travel through an feedback network to remove distortion at high output power. The S-Master gets an digital signal and outputs an analog signal. Everything is done inside the S-Master HX and that does have so many advantages to the sound quality but also the limitation, that the output power is defined by the capabilities of the MOSFET inside the S-Master, there is no Feedback system.
As Sony said in the TA-ZH1ES Interview, Digital Amps are an dead technology, there is nothing really you can improve, and Texas Instruments does have an similar opinion on it. Beside the output power, there is nothing you can do to digital amps, they are pretty much as perfect as it gets.
I just don't see a reason why any design decision inside the DMP-Z1 is helping it be better than the TA-ZH1ES. Almost everything inside the DMP-Z1 is totally designed around the limitation of an traditional DAC/AMP combo and not to be superior to the S-Master. Again the Alps, the two board, all this solves problems the TA-ZH1ES never had.
I personally see the DMP-Z1 as an portable version of the TA-ZH1ES the same way an Notebook is an portable Version of an Desktop. And as with Notebooks/Desktops, the DMP-Z1 does have the same advantages, limitations and the same typical portable tax, the price increase you pay for every device that is portable.