10-July Trial test phase start.......作者: kk_ho 時間: 2010-7-4 22:15
AD1955 KI edition, will start at 10-July
Just drilling some hole and re-wind the cable.作者: bbleung 時間: 2010-7-5 21:10
Hahah KK大國手又一巨作,可唔可以講下呢部UCD400既特性同效能?係比AV用!
係咪會開班呀!作者: kk_ho 時間: 2010-7-6 00:52 本帖最後由 kk_ho 於 2010-7-6 00:55 編輯
Specification:
400W/channel UCD Class D, can be use for AV amp or tube preamp, or AD1955 KII (Variable digital volume control, no need preamp)
430mm W x 70mm H x 300mm D (Ultra slim chassics)
Over 20KG.
Construction:
Pre-drilling hole for DIY beginner, you only need to drill 4 holes for UCD PCB. (We found the UCD PCB with heatsink have some tolerance, which will affect the PCB mounting holes.
Left and Right heat sink mount at chassics for thermal consideration.
2 x 300W R-CORE (42V x 2 + 12V x 2) 42V for UCD power stage, 12V for Opamp stage in UCD.
Can install total 4 UCD 400 in one chassics. OR
Intall 2 UCD 400 + 1 TI (300W + 300W) Class D.
UCD400 amplifier:
Pre modify all of the capacitor to ELNA SILMIC II Super Audio grade capacitor. (Modify work done by KK and labour charge into the fee).
NS LM4562 op-amp onboard, no need to modify.
Power Supply Stage:
2 x 300W R-CORE for 2 channel. (Yamaha DSP-Z11 give you a 500VA EI transformer for support 13 channel amplifier + DSP board).
15,000uF x 8 ELNA Audio capacitor.
DC detection pin to aviod DC output in your speaker, once detect the DC over 3V, the power supply will shutdown to prevent damage to your speaker, traditional speaker protector is the speaker output pass through the RELAY, the magnetic field will affect the audio quality. We use sampling method to detect the DC happen in Speaker terminal.
Power off turn mute to UCD,
Additional Jensen 4 pole power supply board (with above feature) also available.
Soft start
Hypex soft start module to protect the inrush current.
Provide 2 kind of power on sequence : Hard switch or Tach switch.
Front Mains power switch, easy to let user switch off the machine for no longer use. A soft switch will install at the center of the panel.
Target DIYer:
1. Can support just plug and play, Diyer only assemble the board to chassics and connect the wire, Drilling 4 hole only (assume 2 x UCD)
2. Can support semi Diyer, Diyer only assemble the power supply board (SMD components pre soldering.)
3. Full complete unit (Ask).
Course : (Same price)
Target 1 --> 4 people (2 days)
Target 2 --> 2 people (2 days)
Target 3 --> 4 people (0 days, pre-order 2 week in advance)
Sound quality
We will prepare a AB KO comparision soon.
UCD400 Full mod PK UCD400 un-mod
UCD400 Dull mod PK Yamaha DSP-Z11
UCD 400 un-mod PK Yamaha DSP-Z11
If you have AVP-A1HD, AVC-A1HD, POA-A1HD, please let me know.
If you have NuFORCE, ICEPOWER, please let me know.
Also will PK them.
No need to ask Onkyo 5XXX series, Marantz MM8XXX series, waste my time.
KK.作者: bbleung 時間: 2010-7-6 20:55
Wow, content like you mentioned & really expect to hear how is the performance.
When it will be launch for comparision.作者: kk_ho 時間: 2010-7-6 22:42
Will complete at 10-July.
Burn in 200 hour + at hififever / at my home.
The big problem is ship the Z11 from my home to hififever.
Will arrange 3 show at difference one weekday night, and 2 seperate SAT.
(Fri)23-July, (Sat)24-July, (Sat)31-July.
Don't miss this chance.作者: kk_ho 時間: 2010-7-6 23:19 本帖最後由 kk_ho 於 2010-7-6 23:21 編輯
そのほか、高品位なコンデンサー、高性能オーディオ用パワートランジスター、ショットキーバリアダイオードなどを採用。シャーシはAV8003と同じく銅メッキが施され、低インピーダンス化することでグラウンド電位を安定させ、ノイズ低減を図っている。作者: kk_ho 時間: 2010-7-7 00:04
Jensen 4 pole capacitor.
When 2 capacitor in use, pay attention on the connection.作者: kk_ho 時間: 2010-7-10 22:11 本帖最後由 kk_ho 於 2010-7-10 22:18 編輯
砌完了
煲十日十夜,再分離前級電源
至此,功得圓滿
下一步再畫好五金圖紙作者: kk_ho 時間: 2010-7-18 18:41
Last modify:
1. Silmic capacitor for Preamp stage (on PSU board)
2. Silmic capacitor for Preamp stage (on UCD board)
3. Seperate the Preamp power from Mains. (PSU board provide the seperate power to UCD preamp).
Completed. And continue Burn in作者: bbleung 時間: 2010-7-21 22:36
Prof/Doctor KK, when will be launch for the competion with Z11!
EXPECTATION~~~作者: kk_ho 時間: 2010-7-25 02:39
24-July update:
Building the "Smart Switch".
Full completed.作者: samuelsum 時間: 2010-8-4 00:10
看來夾個cd盤來賣...但咁會唔會太數碼味
好聲都未必合喜歡膽聲/ class-a的人噃...多口講下作者: kk_ho 時間: 2010-8-4 01:13
UCD 400 for AV amp upgrade.
CDPRO2 + AD1955 --> CD + DAC.
Difference market.
UCD400 at SEP (Around)
CDPRO2 + AD1955 (NOV to DEC), rolling class. Because too complex. But sure have a beautiful door, LED, etc.作者: samuelsum 時間: 2010-8-4 13:38 本帖最後由 samuelsum 於 2010-8-4 13:41 編輯
100% absolute no need to drill any hole. All holes (include heatsink hole) are pre-open by me.
I made one "template" and use for master copy. Including Front panel Soft power switch.
People only assemble the PSU board (no SMD), and making their connection wire. As you know, most people will use CRAZY cable.
還有這機十分重, 吾好過二堂
KK.作者: cyrus 時間: 2010-9-18 11:37
KK Sir,
會唔會再開班? 價錢多少?作者: kk_ho 時間: 2010-9-19 22:30
會再開班, Early Dec-2010.
2 channel or 4 channel?作者: cyrus 時間: 2010-9-22 22:15
Can I make a 2 channels mono block? How much?作者: TAN00333 時間: 2010-12-7 14:22
KK Sir,
UCD400 Version 2010是多少W输出的?作者: kk_ho 時間: 2010-12-7 17:14
Tan,