I have maked a Zen Headphone Amplifier Kit<PIC>
I configured the Zen in the following manner:
AC 22V/2, SAMWHA 10000Uf/35V as C1/C2.
Wima MKT-2 4.7uF/100V as C2 and Ninchicon Golden-4 100uF/63V as C1/C3
NICHICON-2 2200Uf/40V as C6
MY homeland¡¯s matel RED series resistors
C1815-2 as Q3
Gold-Plated RCA input jacks
ALPS BLUE volume
Original 3.5mm Jack output
Very very nice cabinet.
On the background I see another head-phone amp? Describe the sound of your new amp, is it very different compared to a std. output of a cd-player?
Looks great! How's it sound? I've been trying to think of what to tackle as my next project, and that's a strong contender.
Another one is a Opamp-based Amp.What the circuit is consulted is COMY AMP .Power supply of a transformer AC12V X2.Op use a OP275.
This is it inside PIC.
Output of a old SONY D-135 cd-player.
The cable is a pair of Monster interlink400MKII.
Listen to sense OP amplifier voice fashionable, have passion relatively tentatively. But the sound disturbs , do not hear long.
ZEN make warm, balance stage,can very fine drive HD495 headphone of me, remedy tiny voice it .
Wait a moment I will put the inside picture of ZEN to , make a POST for the first time, thank everybody for paying close attention to :) :)
COMY or CMoy?! :clown:
Sorry,I do a mistake :rolleyes: The Headphone Amplifier is by Chu Moy.
tortello,This is my ZEN inside,thank you maked this job : )I am don't made the muting timer and equalizer circuits .Please give me some advice about this.
If u can't see the image ,download the same Attach file.
I think that the equalizer is not mandatory at all, I've made it to tame the Grado 325's high frequency exuberance, but with other stuff - even with other headphones of the same brand - I don't use it.
The timer is useful if you employ low impedance headphones, which are quite sensitive, like mine: with yours this should not be a problem.
Consider that the original Grado RA-1 amplifier has a turn-on bump itself: I've measured a peak of about 3V!
They ensure that this does not damage the coils, but consider that the Grados with few millivolts do sing...
Congratulations again for your creation.
I am about to build your amp as well and wanna skip the equalizer and the timer.
What about a regulator that slowly raises the voltage.
Would this especial circuit be enough against turn-on bumps?
You could just make the 10uF at the gate of the mosfet a lot bigger which should give a slow "turn-on"!?
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