謝謝幫忙作者: tonywang 時間: 2008-5-21 17:00
:wink: 留個位俾我 ..... 唔該.作者: ricky_lui 時間: 2008-5-21 17:49
Please count me too作者: cp301 時間: 2008-5-27 20:58
I will join for DAC 1955 Balance.
Eric作者: pkwok 時間: 2008-5-27 22:12
[quote:9d8855a6d4="hifi301"]I will join for DAC 1955 Balance.
Eric[/quote]
Does "DAC 1955 Balance" mean truly balanced circuit design DAC 1955 with XLR input/output? Please explain the configuration. How much?作者: lifu9 時間: 2008-5-29 16:46
新手一名, 請留位俾我. tks作者: leonlau 時間: 2008-5-30 13:24
Reserve a seat first. Will see if the class schedule can be fit into my own one as there will be a long trip in the coming few months.
BTW, KK Sir, I also have a few questions to ask:
1) What are the sound differences among 1541, 1547, and 1955?
2) In last DAC course, there is one option with tube buffer. Can this tube buffer be constructed as a separate module to add to the coming 1541/1547/1955 so that I can easily switch it on/by-pass?
Thanks,
Leon作者: raphaelso 時間: 2008-6-8 12:42
I am interested in DAC1955作者: jastudio 時間: 2008-6-11 00:10
Hi
I already have 1541 done, so only want theory..
Jason作者: ray88 時間: 2008-6-21 10:36
Please count me too作者: classicyip 時間: 2008-6-23 07:09
pls count me in !!作者: ricky42c 時間: 2008-6-28 14:46
我都想JOIN DAC 及 CDM9 ,請告知價錢~THANKS!作者: kk_ho 時間: 2008-6-28 23:18
Dyna,
I want your Gundam.....
Looking for MG Gundam V2.0 at 26-July
KK.作者: ricky42c 時間: 2008-6-28 23:47
KK Sir .
Great! All Gundam fans is waiting ....
All 2.0 is perfect !!!
Dyna(Ricky)作者: z1fv8a 時間: 2008-6-30 01:23
Hi, I would like to apply for the DAC and Transport classes
OK, the first class with teach a little bit skill and technique.
KSir[/quote]
Thank you , KSir
我報名作者: rting 時間: 2008-7-13 01:09
like to make a small case DAC, which model is good female vocal and jazz?作者: admin 時間: 2008-7-14 16:31
開課日期, 費用將在下星期公佈, 已留位者請留意電郵作者: bryan 時間: 2008-7-16 11:04
請留2個位給我作者: mak_cw 時間: 2008-7-16 14:19
I would like to reserve one seat. Thanks.作者: bryan 時間: 2008-7-16 15:55
sorry, 因選擇了 hififever 另一課程, 請取消我的留位, sorry again作者: z1fv8a 時間: 2008-7-16 21:39
Please reserve 1 seat for me. Thx.
How about DAC 1955 Pro balance with tube buffer? Is it avilable and how much?作者: admin 時間: 2008-7-25 14:12
TonyWang
Dyna
Welcome to join!作者: admin 時間: 2008-7-28 23:11
mat_tli
MAKCW
Thanks for joining作者: mak_cw 時間: 2008-7-29 13:38
Hi
I have just paid the deposit HK$500 into your HSBC account this afternoon (29-07-2008). Please check.
MAKCW作者: admin 時間: 2008-7-31 13:06
rting, thanks for joining作者: kk_ho 時間: 2008-8-4 00:04
TDA1541A MK4 featuring: (Great improvement of MK1-3)
1. TI DIR9001 input receiver, native on board.
2. Support External clock to DIR9001
3. LED Lock Status of DIR9001
4. Individual power supply to DIR9001
5. Precision components in DIR9001 PLL circuit.
6. TWIN TDA1541A equipped
7. I/V output socket for LPF tube buffer.
8. 4 X NE5532 Single gate Op-amp
9. Pico-Gate logic gate on board.
10. Output Relay.
What is the MK-V featuring ?作者: lifu9 時間: 2008-8-4 09:48
I paid the deposit to chartered bank & faxed the receipt to u today.作者: admin 時間: 2008-8-4 09:59
mat_tli, thx for joining作者: admin 時間: 2008-8-4 11:58
已報名的如想製作1547或ad1955請通知, 今次只有4套1547, 2套ad1955作者: joepet 時間: 2008-8-4 13:18
KK Sir,
I want to join and the problem is I can't come on 5/Sep. Is it a problem for me because only 1 lesson to make the DAC without 理論, 試機, 認識零件.
I would like to join it with the 套件3.作者: admin 時間: 2008-8-4 13:39
Joe6, it will be better if you can come on 4/sep or 6/sep to pick up the kit and kk can teach you how to do assembly at home before coming in the next lesson作者: cktong 時間: 2008-8-4 14:10
please count me in, thanks.作者: admin 時間: 2008-8-4 14:21
Luis, pls apply from here
I want to join and the DAC class with 套件3, please reserve a seat to me but I cannot download the application form from the posted link, can fax the application form to 25058203 please?
Thanks
Ronald作者: admin 時間: 2008-8-5 09:48
Hi sugargar,
The shopping site problem has been fixed
we do not need application form, just put the course in your shopping cart and checkout will be ok. You can then pay by bank in deposit or creditcard.
Featuring:
1. Full DALE resistor
2. Large cap pad size for easy upgrade to Black Gate capacitor
3. Absolute true balance config.
4. 2 X AD1955 DAC
5. Full LCD display input status.
Most of the device are SMD base, we can help you soldering if you need.
Due to alot of resisotr, transistor and diode are need to soldering, a careful and mid-advance DIY skill are needed.
Sound quality is a "very details", with a solid and highest channel seperation.
This board can also work on Un-balance mode, you can adding TUBE buffer to tune the sound taste like a tube taste.作者: kk_ho 時間: 2008-8-5 12:34
DAC 7 TDA1547: DAC No.2
Featuring:
Small form factor size of PCB.
2 SMD device, SAA7350 and SM5842 + TDA1547.
是Clone STUDER的D731的 DAC 7部分circuit
高频部分就采用Mark_Levinson耦合circuit作者: tonywang 時間: 2008-8-5 12:56
KK SIR,
如果我想將部 DAC 放入CDM9 大機箱,邊套先可以 .
TONY作者: autumnleaf 時間: 2008-8-5 13:19
Dear KK,
I just bank in deposit for the DAC course. I also would like to reserve the DAC1955PRO for integrating with the CDPRO2M which I enrolled earlier. So that my CD player has a concrete architect to start with.
I think AD1955 in balance architecture is the most appropriate platform for me. Closed to my current Meridian G08 CDP. Detail system architecture (like I2S clock derived from DAC and feed into CDPROs) will discuss with you later. This makes my project exciting.
Thanks in advance.
Autumnleafcat.作者: sugargar 時間: 2008-8-5 14:31
Dear KK sir,
Sorry to inform you that I've to cancel my booking because of some business matter, hope can join your class later.作者: joepet 時間: 2008-8-5 16:53
Hi, I just enrolled to this course and just paid by PayPal. Please check and confirm. Thanks 作者: admin 時間: 2008-8-5 18:01
henry168 thx for joining作者: admin 時間: 2008-8-5 18:24
Joe6 thx for joining作者: admin 時間: 2008-8-5 18:26
autumnleafcat, thx for joining作者: kk_ho 時間: 2008-8-5 20:12
One chassics include Loader and DAC :
Only 1 solution :
CDM9 / CD-Pro 2 + DAC 7 (TDA1547 DAC)
AD1955 impossible.
TDA1541A, it can, but space is limit. Need to review again.作者: autumnleaf 時間: 2008-8-5 20:36
So I would consider two chassis solution. Not too bad anyway.作者: admin 時間: 2008-8-7 11:01
GOFFIC, thx for joining作者: raphaelso 時間: 2008-8-8 00:08
Dear William,
Just paid the deposit. I would like to join the DAC1955 with black case.
Regards,
Raphael作者: admin 時間: 2008-8-17 22:23
angusha, thx for joining作者: geneltd 時間: 2008-8-19 23:46
I have already deposit the money. Please check.
Can i hear the different between 3 DAC before I choose?作者: admin 時間: 2008-8-20 15:18
gene thx for joining作者: autumnleaf 時間: 2008-8-20 22:58
gene, good idea...作者: ricky42c 時間: 2008-8-21 16:58
可以聽後決定嗎?
現在我都未決定到,選A定C好?
好似好多人選ＡＤ１９５５,為何呢？
１５４１唔及１９５５？
其實邊款好的？作者: ricky42c 時間: 2008-8-21 22:36
無人回.........
為有跟大隊,就AD1955 :wink:作者: kk_ho 時間: 2008-8-21 23:59
All of the 3 kinds of DAC have different character.
If I were you, making 3 of all la.
You may say I earn too much.............. NO.
You can join the most difficult / complex of AD1955 first.
After that, you can easy to make 1547 and 1541 at your home.
We can offer KIT to you. (special price only for AD1955 classmate)
Sure, you need to drill some holes (not more than 10) in HF before you take the KIT to home.
For drilling the alum case, you can mark the basic hole and do it at HF when you take the KIT.
I bought MG2.0 at early stage, $265.
KK作者: geneltd 時間: 2008-8-22 21:50
Thanks, then i choose 1955. Will the DIY very complex to do? I just made some electronic toy 10 yrs ago. :roll: I am worried... By the way , is there any photo of the DAC?作者: sugargar 時間: 2008-8-26 08:38
Dear KK Sir,
I've rescheduled my business matter and can join in the class on Sept but do you still have a room for "套件2 : Analog Device AD1955 TRUE Balance output" ? I'm a bit late but please inform me if still have a room availalbe and I can make deposit immediately, sorry for any inconvenience caused.
Thanks作者: kk_ho 時間: 2008-8-26 10:48
Sugar,
OK, have seat.
Please send email to admin@hififever.com to confirm again.作者: sugargar 時間: 2008-8-26 11:12
Dear KK Sir,
I've made the payment through Paypall today already, Receipt ID: 7M933252UT3014938
Thanks作者: admin 時間: 2008-8-26 12:14
sugargar, thx for joining!作者: sugargar 時間: 2008-8-26 20:36
Dear KK Sir,
Want to ask is there any upgrade options available and can be provided by hififever for 套件2 : AD1955 DAC, e.g. upgrade capacitor to "Blackgate" or other component upgrade?
Thanks作者: angusha 時間: 2008-8-26 22:46
I will join for DAC 1955 Balance.
Thanks :作者: autumnleaf 時間: 2008-8-27 01:17
How about the I2S clock output module from DAC1955 board to CDPRO2.作者: admin 時間: 2008-8-29 16:51
tai chi, thx for joining作者: kk_ho 時間: 2008-8-30 12:49
Autumnleafcat,
It should be IIS input module for CD-PRO2 IIS output
OR
IIS output module for normal CD player
KK
作者: kk_ho 時間: 2008-9-1 18:56
滿額, 下回請早....
NEXT ROUND.............NOV ? OK ?作者: autumnleaf 時間: 2008-9-2 00:51
I've listened to Meridian G08.2 in Central Hifi Galaxy. The New 8.2 has stunning details while maintains suitable bodyline texture of instrunments. Bass and high frequency extremes are widely extended. I think I have to try hard on the DAC1955/CDPRO2 combo to beat this newly release machine on both musicality and fidelity.作者: ricky42c 時間: 2008-9-4 21:57
Dear admin / KK sir
Will the DAC course be held on schedule?
Pls let me know .
Thanks
Dyna作者: kk_ho 時間: 2008-9-4 23:38
Dyna,
See you tomorrow.
Admin will send the email to everybody at tonight.作者: ricky42c 時間: 2008-9-5 01:10
KK sir .
See you tomorrow~
Thanks
Dyna作者: geneltd 時間: 2008-9-6 01:19
KK Sir, what kind of file format is supported by the usb input of 1955 DAC? Is APE support? If yes, I want to add it in my DAC. By the way, do you have any balance cable (finished) for sales?作者: sugargar 時間: 2008-9-6 01:22
KK sir,
I'm using Cambridge Audio 640C V2, can it support 11.2896MHz?
Sugargar作者: kk_ho 時間: 2008-9-6 02:06
You can trust the USB CODEC as a speaker.
The player is the PC, you need to install the SW which can playback the APE file.
All of the sound information will be pass through to USB codec.
When you plug the USB CODEC into the PC, your sound device (sound card / onboard sound) will be disable.
The USB codec will transform the USB audio steam into IIS signal.
11.2896MHz machine check list
http://www.lcaudio.com/index.php?page=39作者: sugargar 時間: 2008-9-6 07:11
KK Sir,
As my 640C player not on the support list, you mean I need to mod my CD player? and install the USB device which you've shown us yesterday into the 1955 DAC? to achieve" 用S/PDIF来连接 >> 转盘与解码器的时钟就要一致，这样才能同步"?
If the answer is yes, that means I need to attaned the CDP mod class later or I better build a HTPC to achieve "转盘与解码器的时钟就要一致"?
THanks !
Dyna作者: mak_cw 時間: 2008-9-6 11:33
Hi KK Sir,
Personally, I think the course is running a bit too fast. And the course material is not detailed enough. I just cannot absorb all the materials just seeing your Power Point flashing on the screen. It'd be better if you can do it a bit slower. Would you please email us the notes before the class or delivery the hardcopy to us during the class, and it will make life easier. Thanks.
MAKCW作者: sugargar 時間: 2008-9-6 14:20
KK Sir,
I'm building 1955 DAC and want to know the price of upgrading to Plan A with OPA797x4, OPA627x4,OPA2604x2, (4.7uf x 4pcs good capacitors around $500), USB module and without all other capacitors.
Thanks作者: kk_ho 時間: 2008-9-6 14:42
As my 640C player not on the support list, you mean I need to mod my CD player?
// It cannot solve the problem, if your CDP core frequency is not 11.28896MHz.
and install the USB device which you've shown us yesterday into the 1955 DAC?
// The PCM2706/7 is 256fs. so the IC can solve this issue.
to achieve" 用S/PDIF来连接 >> 转盘与解码器的时钟就要一致，这样才能同步"?
// AD1955 DAC KIT can support SPDIF. If the input is SPDIF format, no need to care the clock frequency in your CDP.
If the answer is yes, that means I need to attaned the CDP mod class later or I better build a HTPC to achieve "转盘与解码器的时钟就要一致"?
// SPDIF.作者: kk_ho 時間: 2008-9-6 15:00
Personally, I think the course is running a bit too fast.
// Yes, agree. I need to pack 3 DAC into a single class, also tell 3 kind of people for the circuit, up-grade. Therefore, I simple introduce 5 major basic block at very beginning which must have it in DAC.
DIR, Digital Filter, DAC, LPF and Output buffer.
I am believe I am teaching their function in the course. But some of the protocol definition such as IIS, Oversampling, filter characteristic is skip.
And the course material is not detailed enough. I just cannot absorb all the materials just seeing your Power Point flashing on the screen. It'd be better if you can do it a bit slower.
// Agree, but only 1 night (if pure 3 hour) is also cannot teach you everything for whole DAC. I can teach you only DIR parts at 3 hour. But believe most of the technical terms is hard to understand. I do this at last DAC course and CD modifcation class let make people sleeping. Also, I need to balance the level inside the class. I don't know all of 15 people in class, so a very simple block teaching is choose.
Would you please email us the notes before the class or delivery the hardcopy to us during the class, and it will make life easier. Thanks.
// I will have a single class (special class) at coming week (mon-Fri) nights.
Say 7:30pm-11:00pm only. Which teaching the theory only. And Q&A.
A pure DAC theory class for DAC class people.
, after that, I will cancel the teaching at other coming 3 course.
My original plan is :
Night 1 : Simple introduction, 3 type of DAC circuit analysis.
Day 2 : Function of each 5 block. Detail operation of TDA1541A, 47 DAC
Day 3 : Function of each 5 block (cont). Detail operation of AD1955 DAC
Day 4 : Advance modfication tips.
Please let me know what you want ? Also for the classmate.作者: kk_ho 時間: 2008-9-6 15:06
sugargar
I'm building 1955 DAC and want to know the price of upgrading to Plan A with OPA797x4, OPA627x4,OPA2604x2, (4.7uf x 4pcs good capacitors around $500), USB module and without all other capacitors.
// The OPA797, OPA627, and OPA2604 will first to reserve for complete plan A and Plan B user.
I am reserve the LEAD type Op-amp for Plan A, B user first. (also for future DAC class).
Please contact admin@hififever.com to get this special quote. I am not sure the result is good.
// Some good capacitors also inside a capacitor, this is what I found in the DIY market.
// USB module is around $250. KIT only.
Please note: I only have 10set on hand now.
KK作者: sugargar 時間: 2008-9-6 17:30
KK Sir,
Please reserve one USB module to me 1st, waiting admin reply on special quote.
I have a question about the voltage of cap on power filtering part in AD1955 which you have suggested on last night:
1) 4700-6800uf better use 35v+
2) 2200-4700uf better use 25v+
3) 2200uf better use 25v+
If I use blackgate STD cap on the above slot, the voltage of cap in blackgate STD cap stock list is only 16V, if I use the following STD cap on power filtering slot, 16V voltage enough?
1) 4700uf,16V x 2
2) 3300uf,16v x 3
3) 2200uf,16v x 1
In additon, if I use (Blackgate FK) 100uf,16V x 8 in the PCB slot, is 16V enough?
Need some advice
I want to join the (special class) at coming week (mon-Fri) nights, please let me know the exact date. In additon, I want to buy the digital meter $2xx which you shown us yesterday because my tiny meter seems not work, will pickup at the special class.
Thanks
Sugargar作者: kk_ho 時間: 2008-9-6 21:01
Sugargar and all,
Please contact Admin for USB module issue, we reserve by first deposit first serve.
1) 4700-6800uf better use 35v+ (Yes)
2) 2200-4700uf better use 25v+ (Yes)
3) 2200uf better use 25v+ (Yes)
If I use blackgate STD cap on the above slot, the voltage of cap in blackgate STD cap stock list is only 16V, if I use the following STD cap on power filtering slot, 16V voltage enough?
// SURE NOT ENOUGH. Don't use 16V rating, I will not test it unless you change to the voltage rating of the capacitor to recommended value.
1) 4700uf,16V x 2
2) 3300uf,16v x 3
3) 2200uf,16v x 1
In additon, if I use (Blackgate FK) 100uf,16V x 8 in the PCB slot, is 16V enough?
I want to join the (special class) at coming week (mon-Fri) nights,
// It should not be call special class, I put the coming 3 class early into this day. But I need to get a confirm by remain 14 person (total 15 person in class). If all of the classmate agree to have this arrangement, I am no problem.
I want to buy the digital meter $2xx which you shown us yesterday because my tiny meter seems not work, will pickup at the special class.
// Same as USB module issue. Limited stock at HF office, first deposit first serve.
KK.HO
Sugargar[/quote]作者: geneltd 時間: 2008-9-7 09:33
Deposit in class? Paypal?作者: sugargar 時間: 2008-9-7 20:11
KK Sir,
As many 1955 DAC students like me cannot design which upgrade plan is best for us, can you post or send the default parts list and upgrade Plan A & B? so we can compare and make our desicion faster and easier.
Thanks
Sugargar作者: mak_cw 時間: 2008-9-8 11:37
Hi KK Sir,
Good to know that there will be a special class for pure DAC Theory this week. I would like to learn more materials on the topology behind good DAC design instead of practical soldering and assembly skills. Please kindly inform me the time and date when it is fixed.
Regarding the teaching materials, I think it will be great if you can follow closely on the materials as listed inside the course outline. Maybe I am lost as no course notes will be delivered, it seems to me that the following parts have been skipped.
Regarding the 5 blocks you mentioned so far, DIR, Digital Filter, DAC, LPF and Output buffer. May I ask why we need a LPF? What make a good LPF? What is the purpose of an Output buffer? Why not output the signal directly to next stage?
ops: 請問係會制作純DAC 還是可以制作DAC+前級 (依款組合得唔得呢) 一部過呢?
: