The iBasso P3+ Herron has made its way to my door and there are images and more . . . - Page 20

fair enough, don't use the 797 then, as its fairly warm wherever its placed. Just experiment and find a setup you like. For a neutral sound its hard to beat the stock setup though.

the G/L and buffer socket, can change the component to each others? just like u mentioned the 797 in G/L, but if i want to put the 797 in buffer, then the 643 in G/L, ok? or put the transistor to the G/L???

sorry for the idiot questions...

1 more problem, when i adjust my volume in the heron, i can hear some "distortion" sound (sorry, i used funny term again) from my earphone, is only right side of my pk1. do u all have the same prob?

yes you can do those things, but not in all cases are opamps interchangeable with other sockets. Have you got the p3+ manual? It tells you exactly where each opamp and buffer can be placed...
Here is the manual: http://www.ibasso.com/download/2010222231650.pdf

The only mistake in the manual is that they do not mention that 797 can be used in buffer socket, but it can safely be used there.

I have the same problem, I'm not sure if its either how the p3+ is designed or the result of an opamp combo that causes the hissing at volume change. Either way it doesn't affect music playback so its not a big deal.

I dont know if any one else has this issue but I have having severe incompatibility with the AD797. They work with only a handful of OPAMPs and cause severe distortion with more than 60% of all the OPAMPs I have used.

oh ok.. thanks for the link.. i had the manual.. the only thing was i nvr really read through the whole manual.. now i knw which component for which socket.. haha.. thanks again.. if i buy the op-amp from farnel or other shop, it come with the manual? what i worry is i buy, but don't knw how to install or use.. (of course i knw which is pin 1 in SOIC8, but as what i mentioned before, which is for buffer and which is for G/L. this really make me crazy.)

You must use only single-channel opamps in the buffer sockets. You can use single-channel opamps in V & L ground sockets, (the outside-most sockets) but you must use a dual-channel in the center ground socket.

Any SOIC case style opamp must be mounted to an SOIC>DIP adapter.

Also, if you are using only one single-channel opamp in either V or G, use a dummy in the other side. Don't leave an open socket in V or G.

Hi all, I was wondering if anyone could let me know what a good Opamp set up would be specifically for increased treble amount and lessened bass amount (but I love punch).

Cheers

Edited by T.R.A.N.C.E. - 8/16/10 at 9:32pm

I would implore you to try some OPAMP rolling yourself with the numerous OPAMP that you must have received along with the amp.

 

The reason being is that there are other changes to the sound besides the normal bass/treble/mid changes. I found the OPAMP combos altered the soundstage, pace of the music (decay) and transparency.

 

These changes are not very subtle so you should let your own ears decide which combo sounds best.

Hi!

 

Can I put resistors in the output of this amplifier? If so, where would I put them?

 

Cheers,

 

Peter

Hi, I'm back. this few months, after i got the nice info here, i actually listen my P3+ using the stock opamp which was came together with the package when i bought it, which is... 

AD827 
BUF- 634P x2 
G/V- AD797 x2 

 

now i decided to move further which was suggested here before, 

OPA2111KP in L/R,

AD797 in buffer section

OPA627 in the G/VG

 

before i purchase the IC, i have some questions. 

1/ how many pieces OPA2111KP i need? 1 or 2 pcs? How many pieces AD797 and OPA627? anybody using this setup can post a clear photo for me? 

2/ i went through Farnell network in my country, basically i saw few OPA2111KP and OPA627. some of it from different supplier and the price different too.. i need to choose the expensive 1 or just grab the cheapest 1 will do? what is the difference? fyi, the OPA627, the price is 100% difference between the most expensive and the cheapest.. 

 

http://sg.farnell.com/jsp/search/browse.jsp;jsessionid=BAZDD5MUF3CNQCWNBBSBFYY?N=0&Ntk=gensearch_001&Ntt=OPA2111KP&Ntx=mode+matchallpartial&suggestions=false&ref=globalsearch&_requestid=768313 

 

http://sg.farnell.com/jsp/search/browse.jsp;jsessionid=2CIP00A0T5ZQSCWNBBSBFYY?N=0&Ntk=gensearch_001&Ntt=OPA627&Ntx=mode+matchallpartial&displaytext=&_requestid=770125

 

 

sorry for the stupid questions (RON and T.R.A.N.C.E. explained to me before but i still not so clear abt this) and

thanks in advance 

 

 

 

 

Edited by koshinki - 10/5/10 at 8:53am

For the P3+, you will need (1) OPA2111 for LR, same socket as AD827,  (2) AD797 for buffers, they go in the position of the stock buffers and (1) OPA627.  The 627 will go in the center ground socket.  I would select the cheaper opamp for ground, as it does not affect the sound as much as the other opamps.  You might find that you would prefer the sound of another set of 797s for GV (as in stock) as they can output much more current than can the 627.   The LMH6655 also is an excellent choice for the center GV socket.  For the price of the 627, you could probably have 2 more 797s and a 6655, giving you the choice of several fine combinations.

Ron

Edited by HiFlight - 10/5/10 at 9:22am

I can think of no reason at all to put resistors in the output of the P3+!  
 

Thanks RON for the reply.

Hi Ron!

 

It's a simple answer: I own a Etymotic ER4P and I think the P to S adapter is a unnecessary unit. Thus, it would be great to put some resistors in Ibasso to not need to use this adapter.

 

I'm really sorry for not having bought the S version in the first time...

 

Cheers,

 

Peter