2010年3月18日 星期四

Toy6 Full range speaker diy


Full range speaker front view.
Speaker mount on a rack and the rack make by Laser cutting.


Full range compress chamber build by basin and pot inside.


Corner view and wire connect.


Rear view.


Front view.


Sounds not good.

Finally I put my Amp. on it and this speaker become sound traper too.

Toy5 Take Marantz 7 and 和田茂氏 pre-amp case to build D/A


Because when I finish D/A and I connect D/A behind Marantz 7 and 和田茂氏 pre-amp then the pre-amp will decay audio signal so I know pre-amp not Hi-Fi enough.

Toy3 D/A coplue capacitor of Balance output estimate


unknow PP capacitor


Bennic PP capacitor

final use ERO PP capacitor

Toy 2 D/A Power define and verify


D/A Power plan defien and verify.   

2010年2月26日 星期五

Toy 4 D/A with 6Dj8 buffer


High voltage Tube 6Z4


through R-C-L-C to 230V


Change 6DJ8 to E88CC


D/A module CS8416+WM8740 fix volume to buffer.


Volume control 

Toy 7 3-way speaker



High pass filter





Mid band pass filter



Low pass filter



Front View

Front view
Scan D2905/9900+Vifa D75mx-41-08+Sacn 25W8565-01 10''

Freqquency 2k~30k/500~2k/19~500 hz 89dB

2010年1月22日 星期五

Toy1 My first time Audio DIY ... D/A Box.



PCI D/A Card



Hand Make D/A Box
Main PCB is design for Video streaming I just take 19V adpater connect to  +/-12 V ,+5V,+3.3V switching supply power to D/A.
Sub PCB is PCI Audio Card I just take SPDIF signal connect to receiver CS8416 then transfer to PCM feed WM8740 then decode Audio L/R .

走過咖啡店早年歲月

咖啡店從無到有... 從有到無... 歲月的流逝 ,剩下的祇有記憶.

從無到有--- 舊店設立.
從有到無--- 拔營....牧咖啡的咖啡人.....移址, 啡客...........的遷徙.

咖啡店=咖啡+音樂

咖啡=日式咖啡+美式咖啡
日式咖啡=日式單品+日式花式咖啡
美式咖啡=美式單品+美式花式咖啡
.........."請不要找茶".

音樂=古典音樂+真空管