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- Apr 28, 2007
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You're set then. Good!
i found while the pb2 pelican is a excellent amp, when using the er4s with the lme49990 + ha5002 + +10 gain i was over in the 1 o clock ish range for medium to loud, i would have expected the volume pot to be smaller given the pb2's power?
Somewhat inefficient and power-hungry at a stiff 100 Ohms impedance, listeners should consider a headphone amp for maximized detail with iPod/iPad/iPhone and portable sources -- or select the low-impedance ER-4PT model for non-amped mobile applications.
Got my pb2, on Low Gain the Pb2 could not drive my Dt 880 600 ohm, I got sound in only one channel
I fiddle'd with the gain jumpers till I got even sound in both channels, [using the balanced out ofc]
that said does ANY one have a GRAPH or some kind of picture for adjusting the Gain Jumpers
so apprently no Jumpers = low gain
I found the PDF for it
0XX =High
xx0= Medium
000=Low
XX being the jumper
My PDF suggest it's the other way round between medium and high gain ie
0XX =Medium
XX0= High
000=Low
But it does depend on which way you are looking at them !!
Got my pb2, on Low Gain the Pb2 could not drive my Dt 880 600 ohm, I got sound in only one channel
I fiddle'd with the gain jumpers till I got even sound in both channels, [using the balanced out ofc]
that said does ANY one have a GRAPH or some kind of picture for adjusting the Gain Jumpers
so apprently no Jumpers = low gain
I found the PDF for it
0XX =High
xx0= Medium
000=Low
XX being the jumper
After much deliberation and reading of both this and the Opamp threads - thanks all - I have decided on my OP Amp rolling path for the PB2.
1. Lme49990 OPamps x 4 bought off a reputable EBay seller - they have arrived in the UK from the US and awaiting delivery from Customs.
2. MUSES02 X2 awaiting stock (expected any day now)
3. Topflight kit bespoked by Ron in view of the above choices. Ha5002 buffers x4 , plus 4x single Opamp class A adaptors and plus 2x dual Opamp class A adaptors.
I already have two OPA627s, so I suspect I may be tempted to buy 2 more to try them out as well in due course but I want to try the Lme4990 & Ha5002 combination, also a MUSES choice and then to see if Class A biasing makes much of difference.
Reviews to follow when they have arrived.
)Well, you have done your homework pal. Well done
I've had my PB2 for a long time and I've ended up where you are starting. Enjoy...
1. Lme49990 OPamps x 4 bought off a reputable EBay seller - they have arrived in the UK from the US and awaiting delivery from Customs.
2. MUSES02 X2 awaiting stock (expected any day now)
You got links to the sellers please? Thanks.