Chris are u still out there ?
I just used the amp today with a new set of Focal Clears....just fabulous!
Alex
I just used the amp today with a new set of Focal Clears....just fabulous!
Alex
Focal Clear
Hi Alex.
Pretty busy now, I'm currently building my very first pair of speakers...
Focal Clear....whaaou...beautiful headphone, i'd love to have a trial with my Ampcasq !
It's 55Ω and 104dBspl/1mW so it's ok for AmpCasq.
How does it compare paired with yout other head amp ?
Chris
Hi Alex.
Pretty busy now, I'm currently building my very first pair of speakers...
Focal Clear....whaaou...beautiful headphone, i'd love to have a trial with my Ampcasq !
It's 55Ω and 104dBspl/1mW so it's ok for AmpCasq.
How does it compare paired with yout other head amp ?
Chris
Chris,
It works wonderfully! Its right up there with them all. Listening to Eva Cassidy with the amp amd Focal Clears....absolutely great together. No issue with either of the gain settings.
So good to here from you and neat to hear your building a set of speakers!!
Please let us know how that is going!
You mentioned you were looking at a dac a long time ago, did you ever do anything with that project?
All the best
Alex
It works wonderfully! Its right up there with them all. Listening to Eva Cassidy with the amp amd Focal Clears....absolutely great together. No issue with either of the gain settings.
So good to here from you and neat to hear your building a set of speakers!!
Please let us know how that is going!
You mentioned you were looking at a dac a long time ago, did you ever do anything with that project?
All the best
Alex
long way to dac...
Before entering the Dac project, I've been working on a lab supply, rearranging my lab and working on a sig-gen project with 4 layers pcb. Sig-gen is not finished yet, time to write the software was much longer than expected and pcb could enhanced.
In the meantime, I've been following Elvee's threads related to Ezmos and Old-fashioned amps and I decided to build a pair. But I didn't have suitable speakers to go with, this is why I'm currently working on a 2-way passive bookshelf speaker project. This not the straightest path but, when terminated, I'll have a lab, a lab supply, an amp, speakers and additional pcb skills available to start a DAC project ! This will probably be AK4493 or 4499 successors...
That’s the plan, for now …😛
Chris
Before entering the Dac project, I've been working on a lab supply, rearranging my lab and working on a sig-gen project with 4 layers pcb. Sig-gen is not finished yet, time to write the software was much longer than expected and pcb could enhanced.
In the meantime, I've been following Elvee's threads related to Ezmos and Old-fashioned amps and I decided to build a pair. But I didn't have suitable speakers to go with, this is why I'm currently working on a 2-way passive bookshelf speaker project. This not the straightest path but, when terminated, I'll have a lab, a lab supply, an amp, speakers and additional pcb skills available to start a DAC project ! This will probably be AK4493 or 4499 successors...
That’s the plan, for now …😛
Chris
Hi Chris...
I just bought a set of the HEDD headphones from HEDD in Germany. Very heavy at 718gms and new tech AMT drivers.....
Fairly inefficient at 42 ohms @ 87dB SPL for 1mW.
But the little ampcasq in high gein really drives these demanding cans rather well...very clear, and very loud.
Actually seems to present more detailed or better resolution that several other amps here.
Hope things are well over there!!
All the best!
Alex
I just bought a set of the HEDD headphones from HEDD in Germany. Very heavy at 718gms and new tech AMT drivers.....
Fairly inefficient at 42 ohms @ 87dB SPL for 1mW.
But the little ampcasq in high gein really drives these demanding cans rather well...very clear, and very loud.
Actually seems to present more detailed or better resolution that several other amps here.
Hope things are well over there!!
All the best!
Alex
Hi Alex,
Glad to read you are still using AmpCasq.
Your new headphone has amazing driver technology : a folded diaphragm with compress and expand the air !. I would like to listen one, but for now there’s no distributor in Paris.
I’m still surprised by the way this little amp sound, but one should not forget the the chip is not a traditional opamp but an amp designed for headphone.
Actually the first words which come in mind about AmpCasq are the same you’re using : loud, clear, detailed…, our experiences seems coherent.
Stay safe !
Regards
Chris
Glad to read you are still using AmpCasq.
Your new headphone has amazing driver technology : a folded diaphragm with compress and expand the air !. I would like to listen one, but for now there’s no distributor in Paris.
I’m still surprised by the way this little amp sound, but one should not forget the the chip is not a traditional opamp but an amp designed for headphone.
Actually the first words which come in mind about AmpCasq are the same you’re using : loud, clear, detailed…, our experiences seems coherent.
Stay safe !
Regards
Chris
Hey Chris...
Just saw your response....nice to see your ok and things are well with you!
Did anyone else build the AmpCasq?
Alex
Just saw your response....nice to see your ok and things are well with you!
Did anyone else build the AmpCasq?
Alex
In addition to you, I have send 6 pcb but I didn’t received any feedback... I really appreciate yours.
Regards
Chris
Regards
Chris
You might have noticed that Schitt Audio is using te 1622 and 1688 in a few of their headphone amps....
You were ahead of the curve!!
Alex
You were ahead of the curve!!
Alex
Schiit Audio: Audio Products Designed and Built in California
and
Schiit Audio: Audio Products Designed and Built in California
Magni Heresy: choose this one if you want a 100% op-amp-based headphone amp that delivers spectacular measurements. Thank the high-quality op-amps used: OPA1662 for gain, OPA1688 for output—eight (8) OPA1688 stages per channel, for low output impedance and very high current capability. With these advanced parts (the OPA1688 even uses feedforward in its topology), we’re getting 6-8dB lower THD+N than Magni 3+, which is already 10-15dB lower THD+N than Magni 3.
Alex
and
Schiit Audio: Audio Products Designed and Built in California
Magni Heresy: choose this one if you want a 100% op-amp-based headphone amp that delivers spectacular measurements. Thank the high-quality op-amps used: OPA1662 for gain, OPA1688 for output—eight (8) OPA1688 stages per channel, for low output impedance and very high current capability. With these advanced parts (the OPA1688 even uses feedforward in its topology), we’re getting 6-8dB lower THD+N than Magni 3+, which is already 10-15dB lower THD+N than Magni 3.
Alex
Have any pcb’s left for sale? Would love to build this. I’m running the eval board (opa1622evm) with an Rk27. Powered by 4 18650 batteries for about +/- 7.4v. Thinking of adding 2 more to the battery pack, and also figuring out best way to make gain adjustable.
Hi Harry,
Yes, I've one board left. Standard letter fare for US will be close USD5, it should take near 2-3 weeks.
Gain can easily been adjusted with easy to do and neat mods : swapping some caps with resistors.
See post #141 and following :
https://www.diyaudio.com/forums/hea...ntegrated-headamp-project-15.html#post5093918
rgds
Chris
Yes, I've one board left. Standard letter fare for US will be close USD5, it should take near 2-3 weeks.
Gain can easily been adjusted with easy to do and neat mods : swapping some caps with resistors.
See post #141 and following :
https://www.diyaudio.com/forums/hea...ntegrated-headamp-project-15.html#post5093918
rgds
Chris