Hi,
I just bought a dual(double) AK4490 chipset DAC from one of the shops at Ebay. I powered it up and I played music via the SPDIF input, everything seemed to work well and it really sounded better than my older blue board DAC based on the AK4396 chipset I bought about few years ago.
The board comes with 2 single opamps based on NE5534. Each DAC uses a single op amp as output filter and I already have a unity gain tube buffer that I can connect to this op amp. This op amp I understand is really not too bad, but I think there a few better options available. I am considering these options:
Op amp
1. LME49710
2. OPA627
3. LM4562, too smooth but neutral?
Discrete Amps
1. Burson Single V4
Any inputs, comments and recommendations based on your experience are welcomed. Thanks in advance.
I just bought a dual(double) AK4490 chipset DAC from one of the shops at Ebay. I powered it up and I played music via the SPDIF input, everything seemed to work well and it really sounded better than my older blue board DAC based on the AK4396 chipset I bought about few years ago.
The board comes with 2 single opamps based on NE5534. Each DAC uses a single op amp as output filter and I already have a unity gain tube buffer that I can connect to this op amp. This op amp I understand is really not too bad, but I think there a few better options available. I am considering these options:
Op amp
1. LME49710
2. OPA627
3. LM4562, too smooth but neutral?
Discrete Amps
1. Burson Single V4
Any inputs, comments and recommendations based on your experience are welcomed. Thanks in advance.
Based on my experience with DACs, I'd say do away with an output opamp altogether.
Buffer the two phases with darlington connected transistors, use a CCS load for them and then feed those two phases into a transformer, via a cap for DC blocking. If you want filtering you can do that with an LC filter prior to the trafo.
Buffer the two phases with darlington connected transistors, use a CCS load for them and then feed those two phases into a transformer, via a cap for DC blocking. If you want filtering you can do that with an LC filter prior to the trafo.
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