[Sonywalkmanuser]

Here is a simpler way to look at it. This square waves is the digital pulses that S-Master generated. Which is amplified by class D output (green) , so it is an amplified Square Waves again. Not analog signals yet. This amplified pulses will need to pass through the Low Pass Filter to become analog signals

So, by limiting the amplitudes of the Red pulses, the amplified factor of the Green pulses will be directly effected (FE, 2x3 or 1x3, if you take that the class D is always a factor of 3). However, the Red pulses will determine the dynamic range, floor noises, distortions ….where as the green one is a determinations on the total loudness.

High gain is an option to use higher voltage to feed the Green pulses and make it bigger, louder. Volume control steps is controlled from here as well, so whenever you reach beyond 85%, you may start hearing the clicks sound due to the ladder of voltage being fed toward this stage . This has nothing to do with the Red one being capped, so you will still be getting 120 volume ladders but with less dynamic range, less loudness….a direct sound degradation

I think this video(at 8sec) shows a good example of how jitter/errors/noise at the red side directly affects the output of the digital amp:

 

[Sonywalkmanuser]

Looking at this early info on the upcoming new A & ZX class, does it mean the CPU is much improved over whats in our 1AM2/1ZM2 ?

Moving onto the NW-ZX707, we have only the Geekbench information for now, 8 core, with 4 cores at 2.0 Ghz, and 4 cores at 1.8 Ghz. Similar appearance in the benchmarks like the A300, early March, then May, June, late July and finally late October. The results can be found here. The scores are significantly better than the A300, with almost 2x the score in single-core and 2.5x in multi-core. My guess is the SoC being used in the ZX-series could be the Qualcomm SDA660, mostly because it is an 8 core SoC, with 4 cores up to 2.2 Ghz and 4 cores up to 1.8 Ghz. If this is the case, the GPU is slightly slower than the 702 in the A300 but the SoC is faster, due to the custom Qualcomm Kryo cores. There is a chance Sony might use the QCS8250 and just keep the core frequencies lower to save on battery. Once we get a gfxbench score, we will now for certain.​

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Like the looks

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Back like the 1AM2 too

Probably let down with low battery life again.

I wonder if this ZX707 will be using the older ELDC on the ZX507 or the newer Large High Polymer Capacitator on the M2

 

[Whitigir]

I think this video(at 8sec) shows a good example of how jitter/errors/noise at the red side directly affects the output of the digital amp:

I took a look at this Amplifier for speakers. This one is a class D, but is not resembling Walkman in many senses . It uses a very aggressive feedback network, unlike S-Master and Walkman output

 

[Sonywalkmanuser]

For those using DSEE Ultimate as DSP, I recommend trying out this additional tweak:
https://www.head-fi.org/threads/son...lkman-optimization-guide.962975/post-17245026

Please note that whatever tweaks you wish to apply or not, do not hold @Sonywalkmanuser for anything that happens to you or your Walkman, including any misfortune that happens to your pets or your mental sanity.

 

[Sonywalkmanuser]

I took a look at this Amplifier for speakers. This one is a class D, but is not resembling Walkman in many senses . It uses a very aggressive feedback network, unlike S-Master and Walkman output

What I meant to say is that all these digital based amps, with or without feedback, are generating constant flowing waveforms using a crystal clock generator and thus the jitter performance of this clock generator will have much more significant impact on the final sound output quality. .i.e. Even if you have feedback correction, it won't much help if the original clocking source is not accurate enough to begin with, thus even for Technics, they are cleverly using battery to reduce the jitter effects of power supply noise to it's clock generator.

 

[FreeTime]

I have tried listening with my MDR Z1R with low gain on ZM2 for the past few days, wow, so much better. All the while i thought MDR need high gain to shine, i was wrong

Now everything sounds clearer, and the energy level is nearer to ier Z1R

 

[Whitigir]

I have tried listening with my MDR Z1R with low gain on ZM2 for the past few days, wow, so much better. All the while i thought MDR need high gain to shine, i was wrong

Now everything sounds clearer, and the energy level is nearer to ier Z1R

MDR is surprisingly amazing with 1ZM2 !!! Recommended as well

 

[Whitigir]

A special treatments for a friend who loves 1A so much. This here is 5N pure gold grade of 24Awg to replace the OFC stock one . Solder is Mundorf gold infused

 

[Sonywalkmanuser]

What’s that white glue? Is that done by Sony?

 

[Whitigir]

What’s that white glue? Is that done by Sony?

Yes, Sony has always done it. It minimize vibrations as a shocks dampening mechanism

 

[Sonywalkmanuser]

Yes, Sony has always done it. It minimize vibrations as a shocks dampening mechanism

Well I think not many designers will care to do such extreme steps to ensure reliability and minimize vibrations. Most folks would think that audio capacitors do not need vibration damping.

 

[Not so fat head]

Well I think not many designers will care to do such extreme steps to ensure reliability and minimize vibrations. Most folks would think that audio capacitors do not need vibration damping.

If one was sitting on a road compactor while jamming on their Walkman???

 

[Not so fat head]

Btw; I picked up Audeze LCD 2 Classics during the 2022 BF sale.. I hear they are not very efficient, can the1Am2 drive them???

 

[Not so fat head]

I have the A55's, probably no way...

 

[klyzon]

Btw; I picked up Audeze LCD 2 Classics during the 2022 BF sale.. I hear they are not very efficient, can the1Am2 drive them???

I do use my pre fazor 2.2s on 1zm2, about 90 volume on high gain no issues