[LaughMoreDaily]

I just look for some kind of description that says they are dip 8 or on dip8 adapters . That and I looked at a lot of op amps. You can usually tell if it's in dip 8 configuration. Sorry to be not more helpful...

Your right you can tell, it was just a mistake.

I did buy an opamp today that was only 1 chip, while another seller had a two chip version. Would mine be a dual naturally vs the other sellers 2 chips on one browndog be monos making a dual?

 

[atmosfearz]

Hello. Sorry If I missed the correct thread. I've recently ordered my first DAC (AliExpress link). Can you make me an advise: should I change the default 3x NE5532P and which opamps can fit this board? have nothing to compare with and as I get from old threads something like OPA2604AP, AD825 would be better. This one is fake but seems to be good: Muses8920 link. Thank you.

 

[raoultrifan]

I would provide a good example here for TI DACs: http://nihtila.com/2017/01/08/pcm1794a-output-stage-opamp-measurements-lm4562-ne5532-and-opa2134/
- NE5532 is TI’s recommend opamp for IV
- LM4562 seems to have a bit better SNR than NE5532 when used in LPF

If you really-really want to use other opamps (though I wouldn’t really call it an upgrade) you could use in IV MUSES 01 or 8920 and in LPF BURSON V6 or V5, MUSES 02 or 8820 (in order of prefference).

Also, a very good opamp for use in IV is AD8599; it was used with great success inside many M2Tech DACs.

AD8672 and OPA1612 are also very good opamps for use in LPF.

 

[nesty]

I would provide a good example here for TI DACs: http://nihtila.com/2017/01/08/pcm1794a-output-stage-opamp-measurements-lm4562-ne5532-and-opa2134/
- NE5532 is TI’s recommend opamp for IV
- LM4562 seems to have a bit better SNR than NE5532 when used in LPF

If you really-really want to use other opamps (though I wouldn’t really call it an upgrade) you could use in IV MUSES 01 or 8920 and in LPF BURSON V6 or V5, MUSES 02 or 8820 (in order of prefference).

Also, a very good opamp for use in IV is AD8599; it was used with great success inside many M2Tech DACs.

AD8672 and OPA1612 are also very good opamps for use in LPF.

Which test parameter/s do you look into in choosing AD8672/OPA1612 as good LPF? thanks

 

[raoultrifan]

AD8672 is used in many of the M2Tech DACs (including the high-end Vaughan that has 8xPCM1795 DAC chips inside), also its specs are very good as well for output buffer and LPF as well. However, AD8599 has better specs and in M2Tech Vaughan seems to be used in both I/V and LPF stages: https://durobblog.files.wordpress.com/2013/02/6n.jpg (if I remember well, AD8672 is used in output buffer in this DAC).

OPA1612 is relatively new opamp and is widely used in several medium-priced but also high-priced DACs. This is also AKM's recommended opamp in many AKM DAC's in both IV and LPF stages.

If possible, you could try all of the three op-amps from above without getting worried to get oscillations. Of course, MUSES 8920 in I/V and perhaps LPF, MUSES 8820 in LPF and output buffer could be a safe bet too; these will not oscillate and will work just fine.

 

[atmosfearz]

I would provide a good example here for TI DACs: http://nihtila.com/2017/01/08/pcm1794a-output-stage-opamp-measurements-lm4562-ne5532-and-opa2134/
- NE5532 is TI’s recommend opamp for IV
- LM4562 seems to have a bit better SNR than NE5532 when used in LPF

If you really-really want to use other opamps (though I wouldn’t really call it an upgrade) you could use in IV MUSES 01 or 8920 and in LPF BURSON V6 or V5, MUSES 02 or 8820 (in order of prefference).

Also, a very good opamp for use in IV is AD8599; it was used with great success inside many M2Tech DACs.

AD8672 and OPA1612 are also very good opamps for use in LPF.

I've decided to order Muses 8920 from aliexpress because It's really cheap (3x for 12$). I will post a differences with default 5532 when I get it.

 

[raoultrifan]

Most likely not original MUSES on eBay at this price. Here's the correct price: http://www.profusionplc.com/parts/muses8920d - 7 USD each.

 

[atmosfearz]

Most likely not original MUSES on eBay at this price. Here's the correct price: http://www.profusionplc.com/parts/muses8920d - 7 USD each.

I know (wrote it in upper post), but reviews seems to be ok (>100 orders). I'll try and tell you how it sounds.

 

[LaughMoreDaily]

Most likely not original MUSES on eBay at this price. Here's the correct price: http://www.profusionplc.com/parts/muses8920d - 7 USD each.

That's pretty awesome. A legit source too (same cost as potential fakes). Very cool. A great price. But it's sold out...

 

[raoultrifan]

In the main page there are the 3 authorised vendors: https://www.njr.com/MUSES/index.html.


DIP8 8920D is indeed difficult to find for the moment, but SO8/SOIC could be an alternative too for DIY-ers.

L.E.: https://www.audiophonics.fr/en/comp...p-9612.html?search_query=8920d&fast_search=fs would be a trustable source as well, if you're happy with the pricing.

 

[LaughMoreDaily]

DIP8 8920D is indeed difficult to find for the moment, but SO8/SOIC could be an alternative too for DIY-ers.

Why do you think it's hard to find? The popularity of the 8920 or is it being discontinued (probably not?)

 

[atmosfearz]

That's pretty awesome. A legit source too (same cost as potential fakes). Very cool. A great price. But it's sold out...

As for me better to buy cheapest 8920 (fakes are not always bad) than expensive 8920 without any idea If It's real. I would have ordered it for 7$ from this source, but real price is near 12$ on ebay.

 

[LaughMoreDaily]

As for me better to buy cheapest 8920 (fakes are not always bad) than expensive 8920 without any idea If It's real. I would have ordered it for 7$ from this source, but real price is near 12$ on ebay.

I've already been burned on a fake Muses 02. When I buy a Muses 8920 (the only one I want now) I'm buying it straight from a distributor in Japan.

 

[Rroff]

Wonder what the fakes are - seen claims elsewhere they are probably NJM4556 and someone got what was almost certainly LM358 or something like that heh.

Given the price just not worth buying aside from straight from distributor.

 

[atmosfearz]

Wonder what the fakes are - seen claims elsewhere they are probably NJM4556 and someone got what was almost certainly LM358 or something like that heh.

Given the price just not worth buying aside from straight from distributor.

Probably you are right but in my case I replace 5532 and there's more than 100 orders and reviews are saying of good sound whatever it is (link). There's still better question how to check and prove if it's fake.