digi01

http://headwize.com/ubb/showpage.php?fnum=3&tid=5340&fpage=1 the thread gets strong now.wish it is helpful.

to huangyong, yes,all the transistors is matched. to QOO, I think the amp can output at least 2x1W.the transistor that I used is 120V1A0.9W pairs B647/D667. digi

updated,the dual mono amp parts is almost finished.

No,this icute is an integrated headamp,design by a TAIWAN diyer.

thank you bram,here is my diy worktable.I have a couple of brands amp for diy referrence.

yes

finally,I have finished it,modify the output stage with a class b buffer. here is some discussion on headwize, http://headwize.com/ubb/showpage.php?fnum=3&tid=5340&fpage=1 PIC

very helpful,thank you bram

对于这种高频电缆，我是这样调整的： 让屏蔽层作为信号通路，芯线留空不用。声音会明显的增加跃动感。

wonderful what about its sound? cheers

the amp is finished

Ok,that is im crazy thank you Firefox & av98m

OK

for those pcb layout fans,here is my protel ddb file.feel free to use it. Mod edit: Attachment removed.

This is my new design,a chip based headamp(RA1).its minimize parts and wire.I make this PCB that is VERY easy to do. I am glad to encourage new people to go into DIY. Mod edit: Image removed.

its still in progress very hard time to those P2P wiring.

thank you bram.I will post all making details step by step in order.

Hi all,I am come back from vacation here is my BB amp diy experience,im glad to sharing this. pic1,one channel boards(4+4 pairs quality transistors as output)

thank you tropicalrips I am glad share the layout. btw,your design is very nice too

I think its sound dry and clean compare with the wima caps.wima mkp10 is warm.

pic2,

main board,

the amp use quality parts.ultra fast op amp LM6172(slow down by a couple of silver mica caps,20p).and I leave enough rooms for recharge parts,still searching info now step1,

assembled

tight building