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The iBasso D12, dual dacs . images . new Sysconcept optical cable . . Topkit by HiFlight. . - Page 10

post #136 of 575
10/18/10 at 2:00am

thanks.

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post #137 of 575
10/18/10 at 8:08am

im a bit confused. is spdif the same as coaxial? I have ordered the ibasso d12 and need a cable to connect the archos spdif output to the ibasso coaxial input (or optical if it matters). The spdif and coaxial cables look the same will they all work? Can you recommend or point me to a suitable cable of good quality for this job? Thanks.

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post #138 of 575
10/18/10 at 6:39pm

SPDIF is a standard for digital audio transmission while coaxial and TOSLINK (optical) are two implementations of SPDIF.

 

You can get a cheap optical cable first cos I am not sure if there are benefits of buying expensive ones

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post #139 of 575
10/19/10 at 12:21am
I think that giveit2menow needs a coaxial, not optical (Toslink), cable.
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post #140 of 575
10/21/10 at 7:52am

the unit comes with what i gues are extra buffers and/or rollamps? anyway theres 3 of the little blitters. Anyone know exactly what they are and the differences they make?

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post #141 of 575
10/21/10 at 8:04am

when connected via USB port, is the DAC able to play 24bit/96kHz audio (I assume it is able to play it via optical input)?

 

80% of my music collection is in this format that's why I'm interested, but there are very few DACs that do 24/96 via USB.

 

Thanks

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post #142 of 575
10/21/10 at 12:59pm

any comparision between ibasso d4? im liking the fact that the d12 has optical and all, but i do not relaly need it. it would just be nice to use the optical out from my macbook pro and leave a usb port open, however im seeing that the d4 has more power

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post #143 of 575
10/21/10 at 1:04pm
Quote:
Originally Posted by j2kei View Post

any comparision between ibasso d4? im liking the fact that the d12 has optical and all, but i do not relaly need it. it would just be nice to use the optical out from my macbook pro and leave a usb port open, however im seeing that the d4 has more power



I have a prototype Topkit that I am evaluating for the D12 that can supply 250ma/ch.  Further info forthcoming. 

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post #144 of 575
10/21/10 at 2:21pm
Thread Starter 
Quote:
Originally Posted by musicalbox View Post

when connected via USB port, is the DAC able to play 24bit/96kHz audio (I assume it is able to play it via optical input)?

 

80% of my music collection is in this format that's why I'm interested, but there are very few DACs that do 24/96 via USB.

 

Thanks


If your computer is putting out 24 bit 96 khz the dac system will go to 24 bit 96khz. 

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post #145 of 575
10/22/10 at 4:08am
Quote:
Originally Posted by jamato8 View Post




If your computer is putting out 24 bit 96 khz the dac system will go to 24 bit 96khz. 


How could that be possible when your USB receiver chip only supports and accepts 16/44.1, 48?

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post #146 of 575
10/22/10 at 4:12am
Thread Starter 
Quote:
Originally Posted by vkvedam View Post




How could that be possible when your USB receiver chip only supports and accepts 16/44.1, 48?


You are right. I have been working with optical and coax and have been thinking along those lines. Thank you for the correction. 

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post #147 of 575
10/22/10 at 12:21pm

Here's some information on the optical cable product that Jamato has been refering to (from Sysconcept):

 

We are in the process of obtaining the cable, it needs to be jacketed so

it will take few weeks.

We did not post any information about it, as we don't have it officially

in stock.

Here are the spec sheet and partial view picture how it looks under

magnification.

Yes, the cable is impressive, we have made few and have one confirmation

that it work at 24bit/192kHz; as not everybody can test it at this

sampling rate.

All these short cables we make:

http://www.sysconcept.ca/product_info.php?products_id=349

we will use this 1300-core fiber as we have about 2-meter in stock so it

is enough for several cables (about 25); but any cable longer then 30cm

the order will have to wait until we get it in stock and jacket it.

--

Regards,

Sysconcept

 

Specifications:  Plastic Optical Fiber Multi-Core POF 1-1300

Core Material - PMMA

Clad Material - Fluorinated Polymer

Fiber Diameter - 1000 +/- 60 um

Core Number - 1300

Jacket Material - PE

Jacket Diameter - 2200 +/- 70 um

Jacket Color - Black

Attenuation - <0.6 dB/m

Tensile Strength at Break Point - >80 N

Minimum Bending Radius - 1 Mm  

 

1300-cores_x400-sys2.jpg

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post #148 of 575
10/22/10 at 12:46pm

Can the Black Gates that were used to mod the D10 be used to mod the D12?  470uF 6.3V and the 220uF 6.3V?  I got a bunch sitting around that Ryuzoh was supposed to take from me to do the work on my D10 but he is not responding to my mails.  The D12 looks easier to do the big caps now but I noticed that the cap was a 2000uF 16V on Ron's internal shots (on the D10 it was a 1500uF 6.3V).  Jon, what are the specs on the D12's little caps?


Edited by dwonk - 10/25/10 at 11:11am
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post #149 of 575
10/22/10 at 12:52pm
Thread Starter 

The voltage is the same as the D10 so the same caps will work. I will have to look at placement but 6.3 on the voltage is fine. 

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post #150 of 575
10/24/10 at 6:39am

I got the D12 2 days ago and put them through about 24hrs of burn in. 

 

At first, I put my Ultrasone Pro900s on and they sounded terrible with really harsh highs ... but soon realized that's due to the inherent property of the pre burned-in headphones.

 

This morning, I put on my Westone UM2 through them and they sound totally awesome. I previously thought the UM2s lacked highs and were a little too strong on the lows, but combined with the D12, it seems to even things out quite a fair bit. Overall signal was much cleaner which was evidenced by the very much improved instrument separation. 

 

This was with the stock opamps. 

 

I think I've found a very good match for my UM2s which I was going to put on sale. Now I'm gonna keep them, just cause they sound so good with the D12. 

 

Will post more impressions with other headphones soon. smily_headphones1.gif


Edited by jermng - 10/24/10 at 8:05am
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Head-Fi.org › Forums › Equipment Forums › Portable Headphone Amps › The iBasso D12, dual dacs . images . new Sysconcept optical cable . . Topkit by HiFlight. .