iBasso PB-2 Pelican fully balanced portable, DB-2 Dac . . HiFlight recommended op amps page 16. .
Aug 23, 2016 at 8:00 PM Post #1,396 of 1,604

Lohb

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I just took off the top off the original ibasso jumpers. Seemed to have picked up a few over the years having owned P3, P4, and PB2...


You mean you cut off the top plastic bendy part ?
 
Aug 28, 2016 at 2:11 AM Post #1,398 of 1,604

Lohb

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Yes...

Of course if aesthetics are less important you could use fuse wire or a bent paper clip.


Thanks, worked a treat ! No tilt to the amp chips, no DIP 8 adapter needed and the jumper tabs are in there all snipped on mid-gain.
Lid closes too....a new lease of life for an excellent amp !

 

 
Oct 18, 2016 at 6:08 PM Post #1,400 of 1,604

Makiah S

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Glad to see this thread is still kicking! 
 
Happy to say my PB2 is still performing well, 
 
Oct 20, 2016 at 7:53 AM Post #1,401 of 1,604

Lohb

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  Glad to see this thread is still kicking! 
 
Happy to say my PB2 is still performing well, 


Kicking the dust more like it...., but as long as my PB2 doesn't kick the dust I'm more than happy with it.
 
Dec 28, 2016 at 9:40 AM Post #1,402 of 1,604

Lohb

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Anyone no longer using their LME49990s let me know...
 
Dec 28, 2016 at 7:25 PM Post #1,403 of 1,604

Makiah S

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Kicking the dust more like it...., but as long as my PB2 doesn't kick the dust I'm more than happy with it.

Yea I know it's dieing, really hoping iBasso  does an upgrade for the PB2, 
 
Dec 28, 2016 at 8:30 PM Post #1,404 of 1,604

Lohb

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  Yea I know it's dieing, really hoping iBasso  does an upgrade for the PB2, 

http://www.head-fi.org/t/829878/ibasso-pb3-mockingbird-portable-balanced-headphone-amplifier
 
Jan 3, 2017 at 11:52 PM Post #1,405 of 1,604

Lohb

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Anyone find the LME49990 a step up from AD797 ?
I'm using the BUF634P WB in front of AD797 to fill out the body of the presentation.
 
It has been tricky trying to find the right opamp that will work with my Fostex T50 woodies and hybrid IEMs.
AD797 great with planars, but too bright with hybrids.
OPA604 really filled out the hybrid IEM making it musical/rich/full with BUF634P WB but it sounded skewed and rolled off with planars, almost wonky.
 
Did not like either v5i or Sparkos strangely....the quest continues.
 
Feb 3, 2017 at 2:55 AM Post #1,406 of 1,604

Lohb

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Really liking the LME49990 with planars and wondering how MUSES 8820 compares in PB2 ?
I just read the MUSES 8820 is like a budget materials version of MUSESO2, and may pick it up to get a feel for it, before going for a MUSES02.
 
Any PB2 opamp roller input appreciated !
:wink:
 
Mar 5, 2017 at 2:20 AM Post #1,408 of 1,604

Lohb

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So if anyone has a dying battery, it is fairly easy to remove. I started to remove it about 4 times before, but then stopped for fear of ripping traces off below.
it actually is just held in with double-sided tape and is easy to get out. My battery got swollen on previous charge and lid would not close, so this time I went full in 100% to get it out..

So now I'm deciding to get a new battery from iBasso or fill that former battery space with quality caps.
 
Thanks a million to @zilch0md for his very kind gift of 1 set of Muses02. I'm loving the PB2 even more now.
 
Mar 5, 2017 at 2:33 AM Post #1,409 of 1,604

Lohb

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  Using the muses 02 with the WB634 and I like it with the 400I in balance mode.


Planars better with high current/lower battery life BUF634P WB IMO. Normal 634 may be a current bottleneck.
EDIT :
Aha, i see from your review you are using same buffers as me already.
 
Try running it off battery power energizer LPS (zilch0md's photo)

 
or a 16v LPS mains unit such as...
http://www.ebay.co.uk/itm/112007457911?var=410948176767&ssPageName=STRK:MESINDXX:IT&_trksid=p3984.m1436.l2649
 
...vs internal battery or stock power block.
 
Mar 5, 2017 at 4:22 PM Post #1,410 of 1,604

snellemin

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  So if anyone has a dying battery, it is fairly easy to remove. I started to remove it about 4 times before, but then stopped for fear of ripping traces off below.
it actually is just held in with double-sided tape and is easy to get out. My battery got swollen on previous charge and lid would not close, so this time I went full in 100% to get it out..

So now I'm deciding to get a new battery from iBasso or fill that former battery space with quality caps.
 
Thanks a million to @zilch0md for his very kind gift of 1 set of Muses02. I'm loving the PB2 even more now.

Installed two 1800uf 16V caps in place of the stock 1200uf cap.  Worth the effort for basshead use.

 

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