DAC 2496 (AK4393) DAC KIT With CS8416+AK4393+5532 - Page 137 - diyAudio
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Old 20th March 2012, 06:32 PM   #1361
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Hello,
I'm new on this forum and I have very little knowledge of electronics. I want to buy this kit due to it's great reports on this and other forums but I don't know how hard will it be to fit an optical receiver to this kit. Can I suply the receiver from the rectifiers on the board?
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Old 20th March 2012, 07:16 PM   #1362
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Quote:
Originally Posted by qusp View Post
might i suggest LTC6655 as a better alternative? thats if you need a simple IC reference, IC refs are one of the areas you can still produce not only better sound, but much better objective noise performance too. the ICs above are excellent and very flexible, but given a known load and no power or size restrictions they can be used at the heart of superior devices
Thanks for your advices
Serge
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Old 20th March 2012, 07:21 PM   #1363
bcmbob is offline bcmbob  United States
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Quote:
Originally Posted by ClaveFremen View Post
I don't see the two approaches in opposition but rather complementary.

..
Hi Dario, a little misunderstanding - miss-writing. I didn't mean to imply Giovanni's build as an alternative to your work - more correctly an additional step. I Didn't use the right words.

Actually my bigger concern was having to redesign the chassis the DAC will be housed in, as you suggested on the Integrated thread. I've seen a couple excellent completed units that will require a lot more space than I had planned. Before I go too far I'm just investigating all the options. Kinda like "measure twice and cut once"
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Old 20th March 2012, 08:10 PM   #1364
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Quote:
Originally Posted by idjoel2000 View Post
you should have read my post carefully. this mod is only applicable when you are using off board output stage
You're right... sorry

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Originally Posted by bcmbob View Post
I didn't mean to imply Giovanni's build as an alternative to your work - more correctly an additional step. I Didn't use the right words.
No problem

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Originally Posted by bcmbob View Post
Actually my bigger concern was having to redesign the chassis the DAC will be housed in, as you suggested on the Integrated thread.
My shunt is pretty small, as you seen on Fremen Edition PCBs.

Just leave some space for it... if it's good enough...
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Old 20th March 2012, 09:20 PM   #1365
Giobax is offline Giobax  Italy
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My idea comes from some concepts:
1) in "serious" dac the tendency is to separate the power supplies as much as possible.
2) dario has understood that a cleaner power supply is a big improvement for this DAC. (better 78XX regulator like Motorola or CT than standard ones included in the kit)
3) Salas shunt is acclaimed as a great power source in audio equipment...and I LOVE IT! (I use it in B1 buffer and for Hiface)
4)I had all the necessary components...
5) my English sucks!!

How this mod improve sounds? Honestly, I'm not able to say:I never heard the dac before mods. One thing is for sure: it sounds better than my old dir9001 + 4xtda1543. Maybe he did it without the changes even...but now I'm afraid it's a bit late to try . And then I have to confess something: I am not able to hear how it really sounds in my humble setup until my hiFace back to me. The Salas shunt in this case is a tangible improvement and a couple of friends are trying it for a few weeks.

Click the image to open in full size.

Click the image to open in full size.

try it and let me know....

Giovanni
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Old 20th March 2012, 10:15 PM   #1366
bcmbob is offline bcmbob  United States
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Giovann, this appears to be an additional component (Re: post # 1347). Can you describe the full signal path with all the pieces from source (PC, iPod ??) all the way to the power amp?

Thanks.
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Last edited by bcmbob; 20th March 2012 at 10:29 PM.
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Old 20th March 2012, 10:45 PM   #1367
bcmbob is offline bcmbob  United States
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Just for the fun of it - parts check on full kit with some upgrades from Dario. Toe in the water - ready to jump in.

2496Sstart.jpg
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Old 21st March 2012, 01:19 AM   #1368
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Quote:
Originally Posted by Giobax View Post
My idea comes from some concepts:
1) in "serious" dac the tendency is to separate the power supplies as much as possible.
2) dario has understood that a cleaner power supply is a big improvement for this DAC. (better 78XX regulator like Motorola or CT than standard ones included in the kit)
3) Salas shunt is acclaimed as a great power source in audio equipment...and I LOVE IT! (I use it in B1 buffer and for Hiface)
4)I had all the necessary components...
5) my English sucks!!

How this mod improve sounds? Honestly, I'm not able to say:I never heard the dac before mods. One thing is for sure: it sounds better than my old dir9001 + 4xtda1543. Maybe he did it without the changes even...but now I'm afraid it's a bit late to try . And then I have to confess something: I am not able to hear how it really sounds in my humble setup until my hiFace back to me. The Salas shunt in this case is a tangible improvement and a couple of friends are trying it for a few weeks.

Click the image to open in full size.

Click the image to open in full size.

try it and let me know....

Giovanni
it sounds better than my old dir9001
It is as good as the CS 8416 .....Actually i have a DAC ( totaly DIY ) with a DIR9001 and a AK4396 and it sounds very good .

Serge
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Old 21st March 2012, 12:51 PM   #1369
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Default Volume drop off with op amp change

Hi, I'm new to this thread and have been following progress. I bought a complete DAC (AK4396) with the intention of making a few upgrades over time.

The first was to replace the standard op amp with an OPA627BP. I ordered one from Farnells and installed it. When I plugged everything back in there was a drop in the volume of maybe 3 dB and the dynamics are off. I put the old op amp back in and everything was fine again. I thought the OPA627 might have been faulty. I returned it to Farnell for a replacement and it performs the same as the first one. I even tried the same op amp from a friends AK4396 DAC (he doesn't get the volume drop using it in his.). Same result in my DAC.

I'm back to using the standard op amp and scratching my head.

Any ideas what the problem might be?
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Old 21st March 2012, 01:21 PM   #1370
Giobax is offline Giobax  Italy
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Quote:
Originally Posted by canetoad View Post
Hi, I'm new to this thread and have been following progress. I bought a complete DAC (AK4396) with the intention of making a few upgrades over time.

The first was to replace the standard op amp with an OPA627BP. I ordered one from Farnells and installed it. When I plugged everything back in there was a drop in the volume of maybe 3 dB and the dynamics are off. I put the old op amp back in and everything was fine again. I thought the OPA627 might have been faulty. I returned it to Farnell for a replacement and it performs the same as the first one. I even tried the same op amp from a friends AK4396 DAC (he doesn't get the volume drop using it in his.). Same result in my DAC.

I'm back to using the standard op amp and scratching my head.

Any ideas what the problem might be?
Only one OPA627?!?! It's a single opamp and you need two, one each channel.

Giovanni
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