[leeperry]

been rolling all the latest usual suspects and at the end of the day nothing does mids like OPA602BP to my ears, surely it must be used as a final buffer coz it's no resolution king but Morricone truly sounds magical through this little chip(and yes I even tried OPA602CM)

 

 

[FritzS]

  been rolling all the latest usual suspects and at the end of the day nothing does mids like OPA602BP to my ears, surely it must be used as a final buffer coz it's no resolution king but Morricone truly sounds magical through this little chip(and yes I even tried OPA602CM)

 

I had used OPA602AP for a long time in my WNA MKII headphone amp,  now I use OPA627AP(BP) with a little bit more over all performance.
Both OPA602AP and now OPA627AP(BP) are a bit better than all other I had used - LM6171, AD843, LME49710, AD847, LT1056, LT1022, TLE2071, OPA134 
All OPAs are in DIP8 case.
 
Offtopic: Did anyone know about a good follower for the non-polar BlackGate NX 1000 µF 25V electrolytic caps?
Are Nichicon ES a good substitute? I found a non-polar 1000µF 25V at Percyaudio.
Or other non-polar too?
https://en.wikipedia.org/wiki/Black_Gate_%28capacitor%29
http://www.percyaudio.com/Catalog.pdf

 

[palermo]

Tried to modif my alo island, agian muses8820 as lpf, follow by opa627au as voltage gain. I love how it sounds, a bit mid centric, singer stand closer to me with maintain smoothness and clarity, especialy at mid-high region. Something that never done good before. I've tried AD823, LT1361, LME49720MA as lpf with the same 627 being there.
I thought muses8820 has a neutral signature with no bump any freq spectrum.

 

[SpudHarris]

been rolling all the latest usual suspects and at the end of the day nothing does mids like OPA602BP to my ears, surely it must be used as a final buffer coz it's no resolution king but Morricone truly sounds magical through this little chip(and yes I even tried OPA602CM)  

I'm with you there. The 602BP is one of my top 5... As you know, I also invested in the 602CM and to my ears it was colder or brittle in comparison. Have you had chance to try the Burson V5 yet?

 

[WilliamLeonhart]

  Hullo fellow head-fiers. This is my first time in the thread and I would like to ask if anyone has directly compare the MUSES 8820 vs the MUSES 8920? I'm currently using the Little Dot I+, which is a hybrid and also makes it a hassle to switch opamp. Had my first try with both of them today and while they're both very different from the dirt-cheap OPA2107 that I have (sharper treble, less soupy bass), I have not been able to tell the difference between the 2 (I have very short sonic memory). If anyone has both of them, can you please compare between the 8820 and the 8920 for me?
 
Thanks a bunch!

Hi, can anyone offer me your opinion?

 

[willowbrook]

Hi, can anyone offer me your opinion?

Have you searched through ld 1+ forum?

 

[Mad Max]

Anyone tried this one yet?
http://www.ebay.com/itm/251471555181
 
Looks like a little alien spaceship that you plug into your opamp sockets.

 

[proid]

  Hi, can anyone offer me your opinion?

The 8820 soundstage is wider but the 8920 ss is deeper, the 8820 sounds a bit more clear and balance, 8920 sounds darker, and smoother, more analog like. I prefer the 8920 to the 8820.
Btw, i'm from Vn to ))

 

[afshin]

hi  
 
8920 is a jfet  and 8820 is a bipolar ... for after dac input impedance very important ... jfet have higher impedance  ... if you want more dynamic and killer piezo-nois (piezoelectric effect) you must use film capacitor without ceramic cap for bypass PSU on chip ... near chip . mondurf silver oil can help for more and more dynamic like as analog and live sound ... I think  0.47 or 1 uf is enough and not needed smallest cap  . Try to use only one capacitor  .... without  bypass capacitor smaller. if you don't have mondurf  you can use  wima or ero  and other film (mkp) cap.
 
thanks .afshin

 

 

 

[leeperry]

anyone knows where to get those Class A adapters? http://www.head-fi.org/t/592367/matrix-m-stage-over-heating-with-burr-brown-opa637ap-with-class-a-biasing-mod#post_8087518
 
Does OPA602BP benefit from this wild trick?

 

[Cjuried]

Have you tried LM4562 and/or OPA2604 Op amps in your signal path? IMO great sounding chips.
 
Sincerely,   
  
Chris Juried  
Audio Engineering Society (AES) Member  
InfoComm-Recognized AV Technologist
http://www.JuriedEngineering.com (Juried Engineering, LLC.)
http://www.TubeEquipment.com (Tube Equipment Corporation)
http://www.HistoryOfRecording.com (History of Recording)

 

[Cjuried]

  The 8820 soundstage is wider but the 8920 ss is deeper, the 8820 sounds a bit more clear and balance, 8920 sounds darker, and smoother, more analog like. I prefer the 8920 to the 8820.
Btw, i'm from Vn to ))

After reading through the datasheet on the Muses8920 http://www.njr.com/semicon/PDF/MUSES8920_E.pdf I thought it would be worthwhile to give a few a try. Will post my findings after a few critical listening sessions.
 
 
Sincerely,   
  
Chris Juried  
Audio Engineering Society (AES) Member  
InfoComm-Recognized AV Technologist
http://www.JuriedEngineering.com (Juried Engineering, LLC.)
http://www.TubeEquipment.com (Tube Equipment Corporation)
http://www.HistoryOfRecording.com (History of Recording)

 

[sledgeharvy]

After reading through the datasheet on the Muses8920 http://www.njr.com/semicon/PDF/MUSES8920_E.pdf I thought it would be worthwhile to give a few a try. Will post my findings after a few critical listening sessions.
 
 
Sincerely,   

  
Chris Juried  

Audio Engineering Society (AES) Member  

InfoComm-Recognized AV Technologist
http://www.JuriedEngineering.com
 (Juried Engineering, LLC.)
http://www.TubeEquipment.com
 (Tube Equipment Corporation)
http://www.HistoryOfRecording.com
 (History of Recording)

I want to buy the Muses 8832.. I already know that I love the Muses 02 and Muses 8920.. It would be interesting to see what the 8832 sounds like in comparison.

 

[afshin]

yes... muses 8920 & opa2604 is wonderful sound ... for after D/A great ... don't forget only use film cap and break-in 300 hurs ...

 

[bpecsek]

I am trying to come to term with this biasing.
 
Do we need CCS for both channels or one would do?
 
In my phono stage the V- is common for both dual op amps therefor 4 single op amps are basically fed from the same V- rail.
Doesn't injecting biasing current into the V- rail from any of the channels of any op amps output through a jFET cascode would feed all the op amps in the circuit?
 
Thanks,
Bela