51 (edited by KaiS 2022-09-10 08:06:25)

Re: Reason for weak output?

On HiPower, what Volume level do you have to dial to get sufficient loudness with your K-550?

Re: Reason for weak output?

KaiS wrote:

On HiPower, what Volume level do you have to dial to get sufficient loudness with your K-550?

Depends on the song, but around -25.0 dB.

53 (edited by KaiS 2022-09-10 08:42:25)

Re: Reason for weak output?

Sounds wrote:
KaiS wrote:

On HiPower, what Volume level do you have to dial to get sufficient loudness with your K-550?

Depends on the song, but around -25.0 dB.

But that‘s not too bad!

I‘m on HiPower -45 dB, this would be, the vocals in a song are a bit above real human’s talking level.
In general I listen relatively quiet compared to other people, but not extremly so.


Do you have someone around you to judge the loudness at your preferred level?

Even better, have a voltmeter of any kind, so I can guide you through a simple measurement?

Re: Reason for weak output?

KaiS wrote:
Sounds wrote:
KaiS wrote:

On HiPower, what Volume level do you have to dial to get sufficient loudness with your K-550?

Depends on the song, but around -25.0 dB.

But that‘s not too bad!

I‘m on HiPower -45 dB, this would be, the vocals in a song are a bit above real human’s talking level.
In general I listen relatively quiet compared to other people.


Do you have someone around you to judge the loudness at your preferred level?

Even better, have a voltmeter of any kind, so I can guide you through a simple measurement?

I still have difficulty believing that a device of this level can sound so weak, I hear a significant absence of low end dynamics (as though underpowered) compared to my previous entry level dac/amp and I never pushed it even close to -20 dB with the same headphones. The volume seems to be increasing only in the higher frequencies.

I don't have a voltmeter at the moment, I will acquire one in the future.

55 (edited by KaiS 2022-09-10 08:45:13)

Re: Reason for weak output?

Here’s what you could do with a Voltmeter:


Download this file, containing a sine-wave with full level:
https://archiv.rme-audio.de/old/download/0_16.zip


Use a cable and/or adapter to access the headphone signal, e.g. an adaption to RCA or jack.
Even an instrument TS-TS Jack cable can do.
Just plug this in to the first „click“ only (NOT fully).


Play the sine-wave at HiPower 0 dB Volume, ADI-2’s output meter should show 0 dB.
The AC Voltage between RCA pin and sleave, or Jack tip and sleeve, should be 10 V.

56 (edited by KaiS 2022-09-10 08:50:35)

Re: Reason for weak output?

Sounds wrote:

The volume seems to be increasing only in the higher frequencies.

This is what happens with my AKG K-550 with slightly worn ear-pads too, with any amp.

The small driver cannot push enough air if there is a leak.

57 (edited by Sounds 2022-09-10 08:58:12)

Re: Reason for weak output?

KaiS wrote:
Sounds wrote:

The volume seems to be increasing only in the higher frequencies.

This is what happens with my AKG K-550 with slightly worn ear-pads too, with any amp.

The small driver cannot push enough air if there is a leak.

They sounded great with my previous dac/amp just 5 days ago.

58 (edited by KaiS 2022-09-10 09:21:34)

Re: Reason for weak output?

Sounds wrote:

They sounded great with my previous dac/amp just 5 days ago.

Make an objective comparison:

• Setup bot ADI-2 and the other DAC at the same time,
• play with exact same loudness and
• plug back and forth with no long pause,
• while repeating the same passage of music.

This way the ever fooling expectation bias is taken out.


Make sure the other DAC does not use some bass boost switch like on the FiiO stuff.

ADI-2 has a comprehensive EQ to replicate such if needed, later.

59 (edited by Sounds 2022-09-10 09:31:06)

Re: Reason for weak output?

KaiS wrote:
Sounds wrote:

They sounded great with my previous dac/amp just 5 days ago.

Make an objective comparison:

• Setup bot ADI-2 and the other DAC at the same time,
• play with exact same loudness and
• plug back and forth with no long pause,
• while repeating the same passage of music.

This way the ever fooling expectation bias is taken out.


Make sure the other DAC does not use some bass boost switch like on the FiiO stuff.

ADI-2 has a comprehensive EQ to replicate such if needed, later.

The problem is that in my previous dac/amp (as expected) I never had to go above -40dB with these, but with the RME it is barely audible at that level, like the picture we discussed showed, without high power i go all the way to -14dB  -10 dB so difficult to compare.

60 (edited by KaiS 2022-09-10 09:37:42)

Re: Reason for weak output?

Sounds wrote:
KaiS wrote:
Sounds wrote:

They sounded great with my previous dac/amp just 5 days ago.

Make an objective comparison:

• Setup bot ADI-2 and the other DAC at the same time,
• play with exact same loudness and
• plug back and forth with no long pause,
• while repeating the same passage of music.

This way the ever fooling expectation bias is taken out.


Make sure the other DAC does not use some bass boost switch like on the FiiO stuff.

ADI-2 has a comprehensive EQ to replicate such if needed, later.

The problem is that in my previous dac/amp (as expected) I never had to go above -40dB with these, but with the RME it is barely audible at that level, like the picture we discussed showed, without high power i go all the way to -14dB  -10 dB so difficult to compare.

Maybe you misunderstood:
I mean compare at the same perceived loudness.

Ignore the figures, they are misleading.
You can‘t know how much analog gain the manufacturer of each DAC has built in.
Same figures always mean different perceived loudness, that’s sure.

Re: Reason for weak output?

KaiS wrote:
Sounds wrote:
KaiS wrote:

Make an objective comparison:

• Setup bot ADI-2 and the other DAC at the same time,
• play with exact same loudness and
• plug back and forth with no long pause,
• while repeating the same passage of music.

This way the ever fooling expectation bias is taken out.


Make sure the other DAC does not use some bass boost switch like on the FiiO stuff.

ADI-2 has a comprehensive EQ to replicate such if needed, later.

The problem is that in my previous dac/amp (as expected) I never had to go above -40dB with these, but with the RME it is barely audible at that level, like the picture we discussed showed, without high power i go all the way to -14dB  -10 dB so difficult to compare.

Maybe you misunderstood:
I mean compare at the same perceived loudness.

Ignore the figures, they are misleading.
You can‘t know how much analog gain the manufacturer of each DAC has built in.
Same figures always mean different perceived loudness, that’s sure.

I might need to do that, I have slightly unrelated question. When switching between tracks with different sample rates, do you need to restart your player otherwise a bad noise occurs?

For instance, in MusicBee, playing a 44.1 track, state overview is showing SR 44.1 INT 44.1
But then stop, play a 96 track... SR and INT change values to 96.0 but the track does not play properly unless I restart MusicBee.

62 (edited by KaiS 2022-09-10 10:58:05)

Re: Reason for weak output?

@ramses has to answer this, I think he uses MusicBee.

In this posting he told about an ASIO extension needed for MusicBee:
https://forum.rme-audio.de/viewtopic.ph … 61#p191461


ADI-2 doesn‘t care, it just plays what I feed it with, from an iPhone, and with no switching noise between different SRs.

63 (edited by ramses 2022-09-10 12:18:35)

Re: Reason for weak output?

I can confirm that playback over USB/ASIO has some issues with some sample rates in stereo and multichannel mode.
MusicBee 3.4.8033 (latest stable version).
ADI-2 Pro FS R BE, Fw v116, MADIface driver 0.9747.

Checking now with latest MADIface driver version 0.9787.
Same issue with foobar2000 v1.6.2 using module foo_out_asio v2.2.2.

Playback of files in single speed works.
As soon as sample rate switches to double or quad speed foobar2000 shows the following error in a popup window:
   Playback error
   Unrecoverable playback error: Device channel index out of range"

ADI-2 Pro's state overview shows correctly:
USB conn 192 2/2
SRC off
Clock source Int

USB conn 96 2/2
SRC off
Clock source Int

After getting such an error the first attempt to playback a file in single speed (44.1) results in the same error.
But on the 2nd attempt playback in 44.1 kHz works.

Up to now I didn't notice this issue because ADI-2 Pro is connected behind UFX+ (AES, currently ADAT).

BR Ramses
UFX+, 12Mic, XTC, ADI-2 Pro FS R BE, RayDAT, X10SRi-F, E5-1650v4, Win10Pro22H2, Cub12Pro

Re: Reason for weak output?

KaiS wrote:

@ramses has to answer this, I think he uses MusicBee.

In this posting he told about an ASIO extension needed for MusicBee:
https://forum.rme-audio.de/viewtopic.ph … 61#p191461


ADI-2 doesn‘t care, it just plays what I feed it with, from an iPhone, and with no switching noise between different SRs.

Ive been playing alot from my android phone to ADI-2 PRO lately. Really smooth with Neutron player. I upsample at phone to 192khz. No fan noise is +++

ADI-2 DAC, ADI-2 PRO, DigifaceUSB, UCXII, ARC, HEGEL.h80, KEF.ls50, HD650, ie400pro _,.\''/.,_

Re: Reason for weak output?

KaiS, can you do just one final comparison for me?

Low power, Auto-Ref off, EQ off... AKG K550, for a comfortable listening experience, what is your -dB?

66 (edited by KaiS 2022-09-10 21:30:43)

Re: Reason for weak output?

Sounds wrote:

KaiS, can you do just one final comparison for me?

Low power, Auto-Ref off, EQ off... AKG K550, for a comfortable listening experience, what is your -dB?

This is simple:
The difference between Lo- and HiPower is 15 dB

So my AKG K-550 comfortable level at LoPower is -30 dB +/- a few dB, depending on mood and song.


The AKG K-550, even when new, needs a very tight seal for good bass.
Now with ear-pads just about starting to flake, I need to slightly press it.

Re: Reason for weak output?

KaiS wrote:
Sounds wrote:

KaiS, can you do just one final comparison for me?

Low power, Auto-Ref off, EQ off... AKG K550, for a comfortable listening experience, what is your -dB?

This is simple:
The difference between Lo- and HiPower is 15 dB

So my AKG K-550 comfortable level at LoPower is -30 dB +/- a few dB, depending on mood and song.


The AKG K-550, even when new, needs a very tight seal for good bass.
Now with ear-pads just about starting to flake, I need to slightly press it.

Thanks for the reply, my unit is definitely malfunctioning. The best part is that the dealer I bought it from refuses to accept returns so I am stuck with it.

Re: Reason for weak output?

It may well be that the dealer is no longer obliged to take back the device according to the regulations in your country. But if something is defective, he should be responsible for a repair within the usual warranty period. He would probably send the device to RME anyway.
If I were you, I would contact the official RME support, you can find the e-mail on the web server.
Maybe RME can clarify this with the dealer or find a goodwill arrangement for you, or you send it directly to RME.
But you do that by e-mail, not via a forum.

BR Ramses
UFX+, 12Mic, XTC, ADI-2 Pro FS R BE, RayDAT, X10SRi-F, E5-1650v4, Win10Pro22H2, Cub12Pro