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Old 22nd January 2013, 05:14 PM   #191
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i got my DAC7 with CM6631 chip, but i found the below problems:

1.) i cannot play 176k file via USB, does CM6631 support 176k rate??

2.) when playing 192k file, the sound got noise (glitches sound)

anyone know how ot solve this problem?

P.S. my source is Linux MPD server ALSA output...
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Old 22nd January 2013, 06:51 PM   #192
gugi100 is offline gugi100  Netherlands
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Quote:
Originally Posted by vinodt1347 View Post
I have just checked out the DAC7. It sounds quite good though I have concerns about the power supply design as there is a lot of heat being generated.
Hi vinodt1347,

I am starting the build of the dac 7. I have a some questions.
Which parts of the powersupply get very hot. Is it the analogue shunt supply or the digital supply or the analogue wm 8741 supply? What tansformer values do you use?

thanks Gr GJ
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Old 22nd January 2013, 07:33 PM   #193
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Its the 4 larger heatsinks on the board, near the capacitors. I guess these are the analogue shunt supplies. I used the 15-0-15 and 2 x 9V transformer rated at 30W. As I said here, I have also tried the AK4396 DAC which is about 1/2 the cost and I did not see a big difference.
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Old 22nd January 2013, 07:40 PM   #194
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Hi, I just stuck a slightly larger heatsink onto the heatsinks that were radiating the most heat. Its much better now.
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Old 23rd January 2013, 12:38 AM   #195
gugi100 is offline gugi100  Netherlands
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Quote:
Originally Posted by vinodt1347 View Post
Its the 4 larger heatsinks on the board, near the capacitors. I guess these are the analogue shunt supplies. I used the 15-0-15 and 2 x 9V transformer rated at 30W. As I said here, I have also tried the AK4396 DAC which is about 1/2 the cost and I did not see a big difference.
Thank you Vinodt1347,

Good to know it are the analogue shunt larger heatsinks. I have also have bigger heatsinks laying around :-)
Gr GJ
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Old 23rd January 2013, 10:37 AM   #196
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Has anybody ordered OPA627s from the same vendors? Those OPAs are abnormaly chip and must be not original. What do you think about the quality?
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Old 23rd January 2013, 07:17 PM   #197
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I've got one of these TE7022 24Bit 96Khz usb to is2 (or spif) units but doesn't seem to like Windows 8.

Anyone know where to get a driver for it (for windows 8)?
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Old 7th February 2013, 03:00 PM   #198
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I had the Dac5 Kit (v1.7)

I seems get a signal locked from s/pdif (the middle LED light up), however, i didn't get any sound from the RCA out, measure with digital meter, i get a 2.2 dc output from left channel.

does that mean i had done something wrong with it?

thanks for your help.
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Old 13th February 2013, 01:58 PM   #199
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Hello,

I'm planning to buy a DAC7 but I'm not sure about the op-amps. I read that changing the opamp will cause a great sound improvement, but what about the quality of the OPA627 from "minishow0328"? Here in Germany I would pay over 20$ for one OPA627...

Anyone who ordered them and tested?

Would be very grateful when someone could give me a hint

Greetings,
Kai
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Old 23rd February 2013, 09:09 AM   #200
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Quote:
Originally Posted by WaterCooled View Post
Hello,

I'm planning to buy a DAC7 but I'm not sure about the op-amps. I read that changing the opamp will cause a great sound improvement, but what about the quality of the OPA627 from "minishow0328"? Here in Germany I would pay over 20$ for one OPA627...

Anyone who ordered them and tested?

Would be very grateful when someone could give me a hint

Greetings,
Kai
ordered a pair of used opa627 waiting....for the postman..
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