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Class D Switching Power Amplifiers and Power D/A conversion

The New Hypex Fusion Plate amps
The New Hypex Fusion Plate amps
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Old 20th May 2020, 06:34 AM   #2211
YSDR is offline YSDR  Hungary
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Quote:
Originally Posted by Julf View Post
It isn't really an advantage. It doesn't matter if you take a 24-bit signal and attenuate it down to a 16-bit range, or use an analog attenuation to take the signal amplitude down to a level where it only uses 16 bits of a 24-bit path.
Yeah, thanks the clarify! Now I know why I was hesitant to write that comment. Anyway I think that too much people are worrying about the digital attenuation.
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Old 20th May 2020, 06:37 AM   #2212
Julf is offline Julf  Europe
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Originally Posted by YSDR View Post
Anyway I think that too much people are worrying about the digital attenuation.

I agree.
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Old 20th May 2020, 05:05 PM   #2213
fedde is online now fedde  Netherlands
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Originally Posted by YSDR View Post
If you feed the Fusionamps with volumecontrolled analogue input, then the only "bit-eating" function is the filters, because the master volume can stay at 0dB.
That's an advantage of the analogue input I think.
No it is worse to attenuate before the input. You lose bits by not saturating the input. And this is worse because the filters now work with input with less bits. You can best do this attenuation at output, less quantisation issues...
As discussed before, the best is to attenuate analogely by reducing amp gain. And the remaining volume control can best be done with master volume.

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Old 20th May 2020, 05:07 PM   #2214
fedde is online now fedde  Netherlands
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Plus you decrease input SNR by going in with low level...
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Old 22nd May 2020, 06:18 AM   #2215
YSDR is offline YSDR  Hungary
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As an end user, do I need to worry about quantization issues, reduced SNR at lower listening levels or similar? I just enjoy the performance of the FA-s from very quiet to very loud levels, even with low level analogue input without any noticable degradation or whatever.
Although everyone can worry about whatever they want.

Last edited by YSDR; 22nd May 2020 at 06:20 AM.
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Old 22nd May 2020, 09:08 AM   #2216
fedde is online now fedde  Netherlands
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Originally Posted by YSDR View Post
As an end user, do I need to worry about quantization issues, reduced SNR at lower listening levels or similar? I just enjoy the performance of the FA-s from very quiet to very loud levels, even with low level analogue input without any noticable degradation or whatever.
Although everyone can worry about whatever they want.
No you do not need to worry about it. If you are happy with the sound as is, fine. If you want to optimize your chain, try raising input level (but avoid clipping) and reducing master volume instead.

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Old 24th May 2020, 02:38 PM   #2217
danibosn is offline danibosn  Croatia
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The New Hypex Fusion Plate amps
Default gain

what is difference between Input gain configuration increase input sensitivity on Device settings tab and jumpers?
In manual is written jumpers are only for analogue inputs.

What about that on Device settings? For all inputs or?
Can we use them both?
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Old 24th May 2020, 03:11 PM   #2218
daemonsgr is offline daemonsgr  United Kingdom
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Originally Posted by fedde View Post
...and reducing master volume instead. Fedde
Master volume you mean the volume on the hypex remote for example?
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Old 24th May 2020, 09:25 PM   #2219
fedde is online now fedde  Netherlands
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Master volume you mean the volume on the hypex remote for example?
Indeed...
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Old 24th May 2020, 09:30 PM   #2220
fedde is online now fedde  Netherlands
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Originally Posted by danibosn View Post
what is difference between Input gain configuration increase input sensitivity on Device settings tab and jumpers?
In manual is written jumpers are only for analogue inputs.

What about that on Device settings? For all inputs or?
Can we use them both?
I think this input gain setting does not actually change the gain. You can configure only in the gui how the gain jumper in hardware is configured.

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