I'm building Nixon DAC this week so I will know.
There is no really need for FIFO buffer and I2S is the best connection when using a DAC inside a player.
A special and revolutionary I/V stage was also used by Pass Labs and is available to see on their site.
Wit Broadhurst DAC, I would be tempted to improve output stage.
I'm using parallel K grade chips, but improvement is not that big. Using a single, better grade chip would be a good option.
There is no really need for FIFO buffer and I2S is the best connection when using a DAC inside a player.
A special and revolutionary I/V stage was also used by Pass Labs and is available to see on their site.
Wit Broadhurst DAC, I would be tempted to improve output stage.
I'm using parallel K grade chips, but improvement is not that big. Using a single, better grade chip would be a good option.
plethora of dac options albeit flawed?
Hi,
So I have the following options, but only one has a special 12s input.
The dac from
http://www.armoniahifi.com/It/Dac4-it.html
The Broadhurst Dac (as used by Peter, although his is 'ultra modified')
The Dacsa (aspen amps upcoming Dac)
Or for someone like Jocko Homo to redo his 12s design and iv stage etc.
As Peter said the Broadhurts Dac has a questionable output stage. The Dacsa sounds good technically but will not feature a specialist 12s input, although a bit of pcb trickery (tapping the 12s if possible) may suffice. Or the armonia dac, which is specially built for this transport, but the tech specs may be questioned. I don't have the knowledge to build my own so I'm having to rely on a suitable dac being made.
To anyone who knows;
If a dac has a clock on the input of the spdif signal, is this still technically inferior to a 12s input?
I've also heard that 12s has issues, though I'm not sure what they are, can these be counteracted by using the shortest possible wiring from transport to dac?
Thanks
Raj
Hi,
So I have the following options, but only one has a special 12s input.
The dac from
http://www.armoniahifi.com/It/Dac4-it.html
The Broadhurst Dac (as used by Peter, although his is 'ultra modified')
The Dacsa (aspen amps upcoming Dac)
Or for someone like Jocko Homo to redo his 12s design and iv stage etc.
As Peter said the Broadhurts Dac has a questionable output stage. The Dacsa sounds good technically but will not feature a specialist 12s input, although a bit of pcb trickery (tapping the 12s if possible) may suffice. Or the armonia dac, which is specially built for this transport, but the tech specs may be questioned. I don't have the knowledge to build my own so I'm having to rely on a suitable dac being made.
To anyone who knows;
If a dac has a clock on the input of the spdif signal, is this still technically inferior to a 12s input?
I've also heard that 12s has issues, though I'm not sure what they are, can these be counteracted by using the shortest possible wiring from transport to dac?
Thanks
Raj
Here's the quote from Nico:
qty CD-PRO2 price in Euro
12 ---185
36 ---172
120 ---169
Ther is no discount for other parts and when ordered in large quantities (in batches of 12) they don't supply assembled display PCBs nor empty boards. They treat a customer as industrial user, who has to take care of that himself.
They go by product code on declaration, so all duties apply. Shipping is from their center in France and cost 96 Euro, doesn't matter if 12 or 36 units, but they ship in batches of 12. Lead time is pretty long, on average 12 weeks.
qty CD-PRO2 price in Euro
12 ---185
36 ---172
120 ---169
Ther is no discount for other parts and when ordered in large quantities (in batches of 12) they don't supply assembled display PCBs nor empty boards. They treat a customer as industrial user, who has to take care of that himself.
They go by product code on declaration, so all duties apply. Shipping is from their center in France and cost 96 Euro, doesn't matter if 12 or 36 units, but they ship in batches of 12. Lead time is pretty long, on average 12 weeks.
Hi All,
I am sending this group of an update with what's happening in Singapore for PRO2 Units.
Aparently Robert from AHFArtAudio (http://www.ahfartaudio.com/) bought about 10 units of PRO2s recently. So he has already designed a power supply PCB specifically for PRO 2 use and can be bought as a kit or just the PCB. The PCB lines are silver coated for your info.
If you guys have some problem with building the power supply stage for PRO2, you can send him a email, perhaps can consider the kit he's designed.
He's also prototyping a chassis (almost producing soon). You can ask him about it too.
With Robert working on PRO2 units locally in Singapore. DIY people here finally have some direct DIY advise from him regarding PRO2.
Btw, I am building his Parallel TDA1541 Zero Sampling Kit now.
regards,
Ken Chuang
I am sending this group of an update with what's happening in Singapore for PRO2 Units.
Aparently Robert from AHFArtAudio (http://www.ahfartaudio.com/) bought about 10 units of PRO2s recently. So he has already designed a power supply PCB specifically for PRO 2 use and can be bought as a kit or just the PCB. The PCB lines are silver coated for your info.
If you guys have some problem with building the power supply stage for PRO2, you can send him a email, perhaps can consider the kit he's designed.
He's also prototyping a chassis (almost producing soon). You can ask him about it too.
With Robert working on PRO2 units locally in Singapore. DIY people here finally have some direct DIY advise from him regarding PRO2.
Btw, I am building his Parallel TDA1541 Zero Sampling Kit now.
regards,
Ken Chuang
I'm in!!!
I have been following this thread off and on but have some questions.
1. I am not positive how the WIKI threads work so would just like to verify that I am definitely in on a purchase of one pro cd-2. How is contact typically made when I need to pay someone?
2. I would love to help out in anyway possible to be able to build a great unit all at once. This to me would include: clock upgrade (if needed), case and possible display change if needed. How are all of these variables being handled?
3. If the dac from this link http://www.geocities.com/agalavotti/zerodac.htm were to be used, would you just incorporate that into an all-in-one type of unit?
thanks so much for this opportunity.
Joel Wasser
I have been following this thread off and on but have some questions.
1. I am not positive how the WIKI threads work so would just like to verify that I am definitely in on a purchase of one pro cd-2. How is contact typically made when I need to pay someone?
2. I would love to help out in anyway possible to be able to build a great unit all at once. This to me would include: clock upgrade (if needed), case and possible display change if needed. How are all of these variables being handled?
3. If the dac from this link http://www.geocities.com/agalavotti/zerodac.htm were to be used, would you just incorporate that into an all-in-one type of unit?
thanks so much for this opportunity.
Joel Wasser
case
Hi,
I'm up for getting a case from someone like par-metal, who have a front panel designer, perhaps someone who knows what they're doing can use this software to design the top plate and front panel, so that the transport and lcd display could be mounted - anyone?????.
A number of us could then order our cases from here if required.
With regards to dac's the nonoz II dac seems easy enough to build, I think I will parallel 2 of the dac chips though. Peter's gonna try a dac similar to this, he also has a upsampling dac, so he can compare the 2 and let us know of his findings.
Thanks
Raj
Hi,
I'm up for getting a case from someone like par-metal, who have a front panel designer, perhaps someone who knows what they're doing can use this software to design the top plate and front panel, so that the transport and lcd display could be mounted - anyone?????.
A number of us could then order our cases from here if required.
With regards to dac's the nonoz II dac seems easy enough to build, I think I will parallel 2 of the dac chips though. Peter's gonna try a dac similar to this, he also has a upsampling dac, so he can compare the 2 and let us know of his findings.
Thanks
Raj
Hi guys, I'm new here, I'll post on the introductions page later, anyway, I'm in on a transport as well, I haven't added my name to the Wiki page yet but I will. I am a little confused regarding the front panel. On Nico's site it is there for order. Am I to understand it is no longer available, or just not available for a group purchase and we can order them from Nico if we want at any time directly?
BTW Peter, cudo's for organising this. I just went through this doing a big buy of tubes from the UK and it's alot of work.
Chris
BTW Peter, cudo's for organising this. I just went through this doing a big buy of tubes from the UK and it's alot of work.
Chris
We are here:
I don't think Nico will supply 24 kits with display boards, as this amount qualifies us for industrial user. Unless somebody will undertake a task of designing and fabriacating such boards. I'm not that fluent with all that design software (and I'm mostly into p2p these days
).
The other option is, if some of Europen members interested in group buy, can talk over phone with Nico and pursuade him into going with our group buy and supply kits with the boards. But the lead time is 12 weeks, or so they say.
To tell the truth, I'm reluctant at this point to discuss with Nico forum group buy, as I might be buying in a feature transports as industrial user indeed. But I don't mind somebody else making the arrangements.
Peter Daniel said:
I don't think Nico will supply 24 kits with display boards, as this amount qualifies us for industrial user. Unless somebody will undertake a task of designing and fabriacating such boards. I'm not that fluent with all that design software (and I'm mostly into p2p these days
). The other option is, if some of Europen members interested in group buy, can talk over phone with Nico and pursuade him into going with our group buy and supply kits with the boards. But the lead time is 12 weeks, or so they say.
To tell the truth, I'm reluctant at this point to discuss with Nico forum group buy, as I might be buying in a feature transports as industrial user indeed. But I don't mind somebody else making the arrangements.
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