DAC 2496 (AK4393) DAC KIT With CS8416+AK4393+5532 - Page 167 - diyAudio
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Old 18th April 2012, 06:31 PM   #1661
TheGimp is offline TheGimp  United States
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No it is a single channel device.
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Old 18th April 2012, 06:54 PM   #1662
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If you take two, yes.
OPA627 is a single op-amp, NE5532 is a dual op-amp.

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Old 18th April 2012, 07:50 PM   #1663
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Originally Posted by haik View Post
OPA627: 4$ on e-bay, including soldered on an adapter for SIL insertion.
At that price it's probably a fake...
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Old 18th April 2012, 08:24 PM   #1664
TheGimp is offline TheGimp  United States
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Has anyone tried the LT6234 low noise op amp in this type application?

http://cds.linear.com/docs/Datasheet/623345fc.pdf


It as around $4 in single quantities. Digikey has it but Mouser does not list it.
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Old 18th April 2012, 09:07 PM   #1665
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I bought the 2 x OPA627 at e-bay. $7.50 incl. shipping

1PCS Dual to Mono OPA627AU replace OPA2604 NE5532 TL072 | eBay

It will take a month or so, but at least I will have time to get used to the new sound of NE5532, and then when I change it to the OPA627 I can hear the difference.
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Old 18th April 2012, 09:43 PM   #1666
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I am listening to my new Jensen output transformers.
Compared to the capoutput I had before the bass is more tight and the treble is very detailed,great midrange.
I think I have to dampere the tweeter a db or 2.
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Old 18th April 2012, 09:49 PM   #1667
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I think I have to dampere the tweeter a db or 2.
Maybe would be better to add a proper LPF filter to the dac...
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Old 18th April 2012, 10:12 PM   #1668
Ryssen is offline Ryssen  Sweden
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Quote:
Maybe would be better to add a proper LPF filter to the dac...
Yes,right now I have no filtrering at all..
Can you suggest such a filter,preferable on the secondary.
My F3 has an inputimpedance of 47K.
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Old 18th April 2012, 10:36 PM   #1669
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Originally Posted by Ryssen View Post
Yes,right now I have no filtrering at all..
Can you suggest such a filter,preferable on the secondary.
My F3 has an inputimpedance of 47K.
Sadly I don't know how to correctly design it...but I guess you can try with a series resistor of 12 kOhm and a 470 pF shunt cap.

But probably a buffer after the filter is needed.
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Old 18th April 2012, 11:23 PM   #1670
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Quote:
Originally Posted by ClaveFremen View Post
Maybe would be better to add a proper LPF filter to the dac...
I just got finished simulating the LPF on mine, -3dB at 90KHz which is ok for 92KHz bw, but I'd like to roll of starting around40KHz.


The recommended filter in the manual won't be difficult to patch in and should sound better as the -3dB point is around 49.2Khz.

At least it simulates better.
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