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The Opamp thread - Page 312

post #4666 of 4738
Well that's me told!
post #4667 of 4738
Quote:
Originally Posted by SpudHarris View Post

Well that's me told!

 

No problem Nigel. :D
 

I think it was perfectly reasonable to assume that since Gyrocom is an official distributor for Audiotrak, that the jewel boxes were coming from Audiotrak.

 

If that wasn't your assumption, it was certainly mine.  :smile:

 

So, I was disappointed at first, but I'm now convinced it's just a nice add-on from Gyrocom.

 

Mike  

post #4668 of 4738
P4 with Muses 02 in G/VG dummy buffers and LME49990 in L/R.

post #4669 of 4738

Cool, Nigel!  

 

Me like dummy buffers!

 

As I've written before, I have yet to find an op-amp that doesn't degrade resolution, at least a little bit, when used in the PB2 as a buffer instead of using dummy buffers. For some tastes, with overly analytical headphones, the "smoothing" caused by buffers might be desirable, of course - not to mention the current gain that can be had with "real" buffers.

 

I''m not familiar with the P4, so I'm confused, from reading your post, that there seems to be three places to mount op-amps:

 

L/R - where you've mounted LME49990

 

Buffers - where you're using dummies

 

G/VG - where you're using Muses02s  <--- What is "G/VG" ?

 

(The PB2 only has L/R and Buffers, so this has me scratching my head.)

 

Thanks,

 

Mike

post #4670 of 4738

Ground / Virtual Ground?

post #4671 of 4738

Yes.

post #4672 of 4738
Quote:
Originally Posted by zilch0md View Post

Cool, Nigel!  

Me like dummy buffers!

As I've written before, I have yet to find an op-amp that doesn't degrade resolution, at least a little bit, when used in the PB2 as a buffer instead of using dummy buffers. For some tastes, with overly analytical headphones, the "smoothing" caused by buffers might be desirable, of course - not to mention the current gain that can be had with "real" buffers.

I''m not familiar with the P4, so I'm confused, from reading your post, that there seems to be three places to mount op-amps:

L/R - where you've mounted LME49990

Buffers - where you're using dummies

G/VG - where you're using Muses02s  <--- What is "G/VG" ?

(The PB2 only has L/R and Buffers, so this has me scratching my head.)

Thanks,

Mike

The P4 is a 3 or 4 channel Amp. The sound is really customiseable as all 3 rows of sockets can change the sound in one shape or form. Knowing how you get with rolling I would suggest you don't buy one as you would never sleep tongue.gif

The sound with this configuration is amazing but the turn on thud is a bit scary.
post #4673 of 4738
Quote:
Originally Posted by SpudHarris View Post

The P4 is a 3 or 4 channel Amp. The sound is really customiseable as all 3 rows of sockets can change the sound in one shape or form. Knowing how you get with rolling I would suggest you don't buy one as you would never sleep tongue.gif

The sound with this configuration is amazing but the turn on thud is a bit scary.

Sockets are L/R > Buffers > Ground/Virtual Ground...
post #4674 of 4738

Thanks Nigel,

 

Opamps for Virtual Grounds are explained here (I think):  http://www.electronicspoint.com/op-amp-virtual-ground-t103836.html

 

:-)

 

Mike

post #4675 of 4738

What's the difference between the MUSES01 and the OP627? I see Cesar offering both options for his new Portaphile 627 Micro amp and am wondering what to do.

post #4676 of 4738
Quote:
Originally Posted by BucketInABucket View Post
 

What's the difference between the MUSES01 and the OP627? I see Cesar offering both options for his new Portaphile 627 Micro amp and am wondering what to do.

 

This posting might be of interest to you:

 

http://www.head-fi.org/t/432749/the-opamp-thread/4590#post_10164689

post #4677 of 4738
Quote:
Originally Posted by gibosi View Post
 

 

This posting might be of interest to you:

 

http://www.head-fi.org/t/432749/the-opamp-thread/4590#post_10164689

Alright, thank you very much.

post #4678 of 4738

Well I decided I will be selling my genuine MUSES01, I am most likely going to put it on Ebay unless someone says something/PMs.  It's easy to tell the real ones in your hands because the legs are easy to bend unlike a lot of others that are stiff and the logo is obviously perfect.

post #4679 of 4738
Quote:
Originally Posted by SpudHarris View Post

Well the good news is that these OPA2111AM's are the real deal gold plated legs and all. The little adapters that come with are good when you need a quick way to use a TO99 in a DIP socket, no soldering or Brown Dog required.

Anyone interested in getting one of these? I already have two on Brown Dogs as spares but can order more. You can have them for same price as me (£6) + shipping. These retail for £39.00 + VAT each If you want them on Brown dogs ready to roll it will be an extra £2.50 (£8.50 total).


Pic:

I want to do this to my Titanium HD but am struggling to find the amps for a good price, and the adapters anywhere at all. What are those white and green ones there? 

post #4680 of 4738

Don't worry...

 

I can sort you out dependant on how many you are after. I still have a few left over, both adapters and OpAmps so let me know what you need and we can work something out.

 

Cheers

 

Nigel

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