[canchet]

K872 wasn't my thing, I like K812 with the mesh from K872 better.
Strange that my DT1990 can hold its own so bravely with analytic pads, sometimes overtaking the K812.
I listen alternately (depending on my mood) with Composer or DT1990.
With the analytic pads, the DT1990 has a slight “hump” in the mid-bass range, which makes it sound a touch warmer than Composer (“dead straight frequency response” in this range).
The ~8kHz Beyer peak is noticeable in around 20% of my music on the DT1990. Only a slight reduction helps, -5dB at 8kHz is enough.
Composer has no problem with these pieces of music!

Do you know you if it’s possible to use the K872 earpads on the K812? That should be an interesting mod

 

[DarginMahkum]

For Score, the spec says "Rise time: 0.25 µs, TTT on". For a 20 kHz signal at the edge of our hearing we have a period of 50 us. One quarter of it is 12.5 us. So why would anyone need a 0.25 us of rise time?

 

[chesebert]

For Score, the spec says "Rise time: 0.25 µs, TTT on". For a 20 kHz signal at the edge of our hearing we have a period of 50 us. One quarter of it is 12.5 us. So why would anyone need a 0.25 us of rise time?

You confused amplifier design spec with human hearing.

 

[FritzS]

There is the closed vs open to consider.

K872 is like a suction cup, almost completely airtight

DT1990 may be next on my list, have a tentative a buyer for my Neumann NDH30 so may be sooner than later.

would be curious about your judgement

 

[DarginMahkum]

You confused amplifier design spec with human hearing.

Not at all. TTT which is supposed to improve the rise time is the selling point for this amp, so I would like to understand the background. 0.25 us means 14MHz bandwidth. That for sure would improve the square wave in the lab but I don't see how it is relevant for audio reproduction. If you don't have any technical / mathematical explanation, you are welcome to stay silent.

 

[FritzS]

For Score, the spec says "Rise time: 0.25 µs, TTT on". For a 20 kHz signal at the edge of our hearing we have a period of 50 us. One quarter of it is 12.5 us. So why would anyone need a 0.25 us of rise time?

I hear without TT on.
No music signal offers these transients, good microphones go far beyond the human hearing range, but the upper cut-off frequency is cut off below half of the digital sampling frequency - studios and mixing consoles usually only use 96 kHz, above that only in exceptional cases - that means 48 kHz is already cut off, probably the roll-off starts at just above 20 kHz. Also avoids unwanted HF interference.

 

[canchet]

Not at all. TTT which is supposed to improve the rise time is the selling point for this amp, so I would like to understand the background. 0.25 us means 14MHz bandwidth. That for sure would improve the square wave in the lab but I don't see how it is relevant for audio reproduction. If you don't have any technical / mathematical explanation, you are welcome to stay silent.

I believe the TTT “feature” on The Score is about slew rate, which is V/us. So it’s more likely to be gimmick as this is beyond the limit of human hearing.

 

[FritzS]

Do you know you if it’s possible to use the K872 earpads on the K812? That should be an interesting mod

I use only the mesh from K872 - I got a sample from friends. K812 - K872 pads are incompatible!
AFAIK NOMAX have a YT video about.

 

[FritzS]

I believe the TTT “feature” on The Score is about slew rate, which is V/us. So it’s more likely to be gimmick as this is beyond the limit of human hearing.

AFAIK (as far as I know) .....
This high slew rate helps only for NFB (Negative FeedBack) of the amp. At Class AB amplifier to reduce crossover distortion in the power stage.

About music hearing ....
https://www.head-fi.org/threads/the...y-austrian-audio.969871/page-78#post-17817936

 

[DarginMahkum]

I believe the TTT “feature” on The Score is about slew rate, which is V/us. So it’s more likely to be gimmick as this is beyond the limit of human hearing.

Though they are related, AA explicitly states "rise time" for TTT mode. Just as I said also earlier, I also think it is a gimmick

I hear without TT on.
No music signal offers these transients, good microphones go far beyond the human hearing range, but the upper cut-off frequency is cut off below half of the digital sampling frequency - studios and mixing consoles usually only use 96 kHz, above that only in exceptional cases - that means 48 kHz is already cut off, probably the roll-off starts at just above 20 kHz. Also avoids unwanted HF interference.

Actually an analog amplifier doesn't have much to do with the sampling frequency, as we feed analog signal that has already been through the DAC into the amplifier - which is pretty much 20 kHz and below.

 

[FritzS]

Though they are related, AA explicitly states "rise time" for TTT mode. Just as I said also earlier, I also think it is a gimmick

....

Actually an analog amplifier doesn't have much to do with the sampling frequency, as we feed analog signal that has already been through the DAC into the amplifier - which is pretty much 20 kHz and below.

I know .....
You didn't understand what I meant by this - I was describing why most digital sources no longer contain such high audio frequencies - it is simply impossible due to the digitalisation process!
This is also due to the necessary audio filters of the AD converter, whose cut-off frequency again depends on the sampling rate.
Have I described this clearly?

More about please read here https://www.ti.com/lit/an/slyt626/slyt626.pdf

 

[ThEvil0nE]

It's mid November already. What's the official set-in-stone release date?

 

[Nomax]

It's mid November already. What's the official set-in-stone release date?

The first composers leave the production facility this week

NOMAX

 

[ThEvil0nE]

The first composers leave the production facility this week

NOMAX

For worldwide distribution or EU regions first?

 

[Halleluhwah]

How is the leakage tolerance on this? Any measurements? I want to know if they're friendly with glasses.