This is a combined unit USB-transport+DAC+headamp.
E-mail author for details.
I'm just looking for the crossfeed.
I already have a good dac and amps.
Will send an email.
Thanks.
DIY
Calculator download for the 1st xfeed with high & low impedance:https://headwizememorial.files.wordpress.com/2018/03/chumoycrossfeed.xls
Calculator download for the 1st xfeed with high & low impedance:https://headwizememorial.files.wordpress.com/2018/03/chumoycrossfeed.xls
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This is subjective audio. In fact headphone cross-feed is VERY individual. Everybody has different ear-shapes and head thickness.
Yes, there are five "different implementations" but if you draw them similar with all their values they are not all that different.
Of the 6 versions that I linked to in post #7, we finally settled on the passive Danyuk.
More than 10 people have tried this and none of them has gone back to no cross feed afterwards.
https://www.diyaudio.com/forums/pass-labs/271926-f5-headamp-11.html#post4759695
https://www.diyaudio.com/forums/pass-labs/271926-f5-headamp-10.html#post4671587
Dimitri also went for our passive version in his own HPA design :
http://www.linearsystems.com/lsdata/others/Headphone_Amplifier_Evaluation_Board.pdf
(See Ref. 4 & 5)
Patrick
More than 10 people have tried this and none of them has gone back to no cross feed afterwards.
https://www.diyaudio.com/forums/pass-labs/271926-f5-headamp-11.html#post4759695
https://www.diyaudio.com/forums/pass-labs/271926-f5-headamp-10.html#post4671587
Dimitri also went for our passive version in his own HPA design :
http://www.linearsystems.com/lsdata/others/Headphone_Amplifier_Evaluation_Board.pdf
(See Ref. 4 & 5)
Patrick
Sorry Patrick, I could not find the referenced "Danyuk" in your linked posts. Could you attach here a schematic?
The circuit described in the pdf is the passive Danyuk.
For details refer to the links in post #7.
Patrick
For details refer to the links in post #7.
Patrick
Room’s DSP has a cross feed filter which has 2 presets and the option to fiddle about with your own settings. I’ve found my preferred one and like it very much.
Please let us know how works, I use the Bass-Enhanced Natural Crossfeed Filter with great success, all caps teflon.
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I listened by far only the software plugin crossfeed, included in foobar's DSP manager...and I have split conclusions...some recordings sound better, some don't...it's hard to say "better or worse". But for sure it sound interesting and different...
I don't want to reload an old thread, if there's one, please redirect me, but I should rather make a passive filter after the phones output, I won't modify an existing good amplifier, especially a good sounding one, to add a certain neliniarity to the sound. But for those recording, especially vocals, where crossfeed seems to be pleasant, for me, I should add a little box and keep it along with the headphones I use for listening those recordings I think can benefit from crossfeed.
I don't want to reload an old thread, if there's one, please redirect me, but I should rather make a passive filter after the phones output, I won't modify an existing good amplifier, especially a good sounding one, to add a certain neliniarity to the sound. But for those recording, especially vocals, where crossfeed seems to be pleasant, for me, I should add a little box and keep it along with the headphones I use for listening those recordings I think can benefit from crossfeed.
Can you tell use what amplifier did you use with this crossfeed circuit and what headphone, especially impedance?
A crossfeed after the amp depends entirely on the impedance characteristics of your headphone.
So you will need a customised one for each specific phone.
There is no universal solution.
The circuit in post #13 you can build as an add-on before your headphone amp.
The only requirement is a high input impedance (e.g. 100k).
If you (like me) have a 10k pot at the input of the amp, then just replace R4, R8 by 12k.
Works perfectly.
The crossfeed will attenuate the input by 10dB.
So you need to turn the volume up.
And you can remove it anytime with no consequences.
Patrick
So you will need a customised one for each specific phone.
There is no universal solution.
The circuit in post #13 you can build as an add-on before your headphone amp.
The only requirement is a high input impedance (e.g. 100k).
If you (like me) have a 10k pot at the input of the amp, then just replace R4, R8 by 12k.
Works perfectly.
The crossfeed will attenuate the input by 10dB.
So you need to turn the volume up.
And you can remove it anytime with no consequences.
Patrick