Well, i want to incorporate a headphone amp inside my preamp, and spent a while looking for some posibilities. The first one i considered was the THS6012 based one (a high speed opamp designed for ADSL, *impressive* specs!), but it's just too irksome to implement, being a SMD chip.
So, now i'm focusing on this design. Looks quite simple, and reminiscent of the JLH series (perhaps that's why i like it), and if it sounds half as good as the JLH, i'm set. Has anyone tried this design? Comments? Feedback? All appreciated! 😀
So, now i'm focusing on this design. Looks quite simple, and reminiscent of the JLH series (perhaps that's why i like it), and if it sounds half as good as the JLH, i'm set. Has anyone tried this design? Comments? Feedback? All appreciated! 😀
I was going to, but am building the power amp instead. It should be as good or better than Class-A FET headphone amps. Nice simple design. Good quality PCBs. Parts readily available / easily substitutable.
Hi!Lisandro_P said:Well, i want to incorporate a headphone amp inside my preamp. Comments? Feedback? All appreciated! 😀
Have you checked with the headphone guys at http://www.headwize.com?
Forgot to mention: I have a +/- power supply, so I'm building one channel of the DoZ to run off a negative supply. Using complementary transistors, reversing caps, etc. This was the way I was going to build it up for a headphone amp, running off a +/- 25V supply.
If you're building this into a preamp, you might also consider just an op-amp like the OPA2134 (you can parallel them for more output current), or a boosted version using something like the BUF634. Ideas abound at the headwize site. Your choice may depend on how much power supply you have, and what headphones you are driving.
If you're building this into a preamp, you might also consider just an op-amp like the OPA2134 (you can parallel them for more output current), or a boosted version using something like the BUF634. Ideas abound at the headwize site. Your choice may depend on how much power supply you have, and what headphones you are driving.
Look at my diamond-buffer application .. it's perfectly suitable for low impedance headphones..
see thread "... buffer help.." ..
I am gonna build this thing soon ...
succes,
Thijs
see thread "... buffer help.." ..
I am gonna build this thing soon ...
succes,
Thijs
Lisandro
Headwise is a great site, but somehow i don't like most of their designs a lott... they're very good, don't get me wrong, but somehow they don't ring my bell 🙂 i preffer BJT's instead of MOSFETs for low power and such...
Headwise is a great site, but somehow i don't like most of their designs a lott... they're very good, don't get me wrong, but somehow they don't ring my bell 🙂 i preffer BJT's instead of MOSFETs for low power and such...
You should keep in mind the that most (if not all) headphones use a common ground (tip ring sleeve) between channels. A balanced output probably will not work.
Aud_Mot
Aud_Mot
Aud_Mot said:You should keep in mind the that most (if not all) headphones use a common ground (tip ring sleeve) between channels. A balanced output probably will not work.
Aud_Mot
Unless (with some headphones) you cut up the cable...something tschrama and I were discussing several months ago.
Remember:
Mods to your headphones will stop you from trying your buddy's bitchen' new headphones on your amp.
Plus... It will void the manufacture's warrenty. HA! (insert sly grin here)
Mods to your headphones will stop you from trying your buddy's bitchen' new headphones on your amp.
Plus... It will void the manufacture's warrenty. HA! (insert sly grin here)
paulb,
I'm no expert but "building one channel of the DoZ to run off a negative supply" seems more complicated than just paralleling up the output to give +25v with twice the current.
I'm building a DoZ as well but haven't thought much about the PS yet. I was planning to run it from my existing +25 0 -25 volt PS, bugger. 🙂
Greg
I'm no expert but "building one channel of the DoZ to run off a negative supply" seems more complicated than just paralleling up the output to give +25v with twice the current.
I'm building a DoZ as well but haven't thought much about the PS yet. I was planning to run it from my existing +25 0 -25 volt PS, bugger. 🙂
Greg
My supply has a common ground. I can't parallel it up. Thus the complementary channel.grege said:
I'm no expert but "building one channel of the DoZ to run off a negative supply" seems more complicated than just paralleling up the output to give +25v with twice the current.
I could buy parts for a new supply but I'm a bit of a cheapskate.
Hello, time ago I built a simple headphone amp, with great results, in my opinion.
The "inspiration"? The Pass' Zen, of course.
You can find it at this URL:
http://www.diyaudio.com/forums/showthread.php?s=3a784fc3e3ca2361f4a5a2bd62fc
48d7&threadid=2451&perpage=15&pagenumber=1
Maybe I will publish the whole project in Headwize projects section, as soon as possible.
Marcello
The "inspiration"? The Pass' Zen, of course.
You can find it at this URL:
http://www.diyaudio.com/forums/showthread.php?s=3a784fc3e3ca2361f4a5a2bd62fc
48d7&threadid=2451&perpage=15&pagenumber=1
Maybe I will publish the whole project in Headwize projects section, as soon as possible.
Marcello
Didn't work directly, try this one:
http://www.diyaudio.com/forums/showthread.php?threadid=2451&perpage=15&pagenumber=1
http://www.diyaudio.com/forums/showthread.php?threadid=2451&perpage=15&pagenumber=1
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