Omicron, a compact headphone amp with -140dB distortion

[Brakspear75]

Hi Alexcp,

If there is another group buy, can you add me in for a through hole pcb + power supply, thanks.

 

[alexcp]

Just opened a new GB thread: Omicron 3rd GB. I took the liberty of signing up @Brakspear75 and @drof - feel free to correct the sign-up list if I made a mistake. The GB will close on Sunday, June 2, 2024. Be sure to sign up before then.

 

[Brakspear75]

Thanks @alexcp - you have my request down perfectly on the GB.

 

[alexcp]

Gentle reminder: the latest GB for Omicron boards will close in a couple of days. Now is a good time to join it!

 

[alexcp]

Just to remind: the latest GB for Omicron boards will close tonight.

 

[HRDSTL]

I am still hesitating whether to join the group buy. I am currently building DCG3 by Salas.

I would also like to know what bias this headphone amplifier has, and if it can be increased. I have a headphone Denon 25 ohm, 105Db/mW

Thanks.

 

[alexcp]

That's not a difficult load. Omicron's through-hole version in its stock version runs at 50mA quiescent current. It will stay in Class A while delivering 200mW peak into 25 ohm. The SMT version runs at 25 mA. It will leave Class A at about 60mW peak into 25 ohm, but even then Omicron will stay more linear than the vast majority of headamps.