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Old 5th August 2012, 06:20 PM   #1
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Default May AYA II, Revision A DAC

Hi. These are pictures of my own version of the popular AYA II, Revision A dac. Since the original kit was no longer available, and I had access to the kit details from a friend, I made my own. Searching for a case solution, I came across an original Ayre QB9 case, silver color on Audiogon. I bought it and designed a custom rear panel from Front Panel Express.

This is the latest version 2, revison A with selectable SPDIF and USB inputs, sophisticated shunt power supplies, latest polyphenyle sulphide SMD TDA1541 filter caps. This very special DAC is custom built with separate power transformers for each supplies and Ayre power input filter and original QB9 Ayre case. There is a real 75 ohms SPDIF input connector and transformer coupled digital input. Audiophile grade parts are used throughout such as the now impossible to get Black Gate NX output caps, Allen Bradley carbon composite resistors, Rubycon ZA caps, Cardas connectors, EAR vibration control feet, 6N pure copper interconnect wires, etc. The USB is auto detected by the PC, no need for a special driver and it is the standard synchronous CD quality type. Controls are:Two front switches (under the front panel): Power On and SPDIF/USB selector.Three Led indicators (behind the Ayre case central window): Central Power On led indicator, left SPDIF Lock, Right USB Connected led.
Attached Images
File Type: jpg AYA_II_Front.jpg (64.6 KB, 266 views)
File Type: jpg AYA_II_Back2.jpg (68.6 KB, 255 views)
File Type: jpg AYA_II_Inside-1.jpg (160.4 KB, 259 views)
File Type: jpg AYA_II_Inside-2.jpg (109.3 KB, 250 views)
File Type: jpg AYA_II_Inside-3.jpg (141.8 KB, 236 views)
File Type: jpg AYA_II_Inside-4.jpg (203.3 KB, 139 views)
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Old 5th August 2012, 06:22 PM   #2
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Here more detailed pictures of my PCB.
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File Type: jpg Img_6249.jpg (178.4 KB, 169 views)
File Type: jpg PCB_Bottom.jpg (135.4 KB, 124 views)
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Old 5th August 2012, 06:22 PM   #3
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To compare, images from the original DAC.
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File Type: jpg hifi_1254299564_news.jpg (199.5 KB, 146 views)
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Old 5th August 2012, 07:02 PM   #4
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Looks sweet, congratulations!

^ I never white such things about builds, but not in your case
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Old 6th August 2012, 10:42 AM   #5
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how much for a pcb?
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Old 10th August 2012, 07:25 PM   #6
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Hi Algar_emi, Real nice. I borrowed many of Pedja's ideas in my own dac. I haven't tried the discrete diamond circuit yet. The AD844 version is very musical, detailed. To bad the Aya II is no longer available. Dave
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Old 10th August 2012, 07:26 PM   #7
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If you offer a board I'd consider getting one.
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