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NicMac  
#1 Posted : Saturday, January 29, 2011 6:32:21 PM(UTC)
NicMac

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Possibly stupid question: which are the I/V resistors (R1-4 or R13-16) doing the actual I/V conversion on IVYIII?
Cheers,
Nic
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Beefy  
#2 Posted : Sunday, January 30, 2011 6:50:30 AM(UTC)
Beefy

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None of them, really. The I/V is done by the signal being directly fed into the OPAMPS and the resistors are just there to control the feedback.
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NicMac  
#3 Posted : Sunday, January 30, 2011 11:15:08 AM(UTC)
NicMac

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Thanks. I had a better look at the schematics and in fact they are in the op-amp feedback loop and not in the signal path.
I was just looking for somewhere to "tweak" on the IVY III. It is already fantastic with my cans but as I have a second unused kit I wanted to do some experimentation just for the fun of it. Difficult to find anywhere on the IVY II for improvement!
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barrows  
#4 Posted : Sunday, January 30, 2011 5:12:05 PM(UTC)
barrows

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Thanks: 1 times
Feedback resistors are definately good ones to tweak for better sound.
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NicMac  
#5 Posted : Monday, January 31, 2011 12:50:58 PM(UTC)
NicMac

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Yes - you may be right but:
1) there is quite a few of these on the board.....
2) low tolerance appear to be an important feature of the IVY III design and I don't want to spend >500$ on bulk foil resistors.....
Maybe the filter caps? Only 4 pcs of those and several people seem to like polystyrene caps for this purpose on the Legato. I'm not much into cap-rolling and I would not know what type/value would be the best here. I'm can hear that the film caps chosen by Russ and Brian already do a very good job!
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pinnocchio  
#6 Posted : Monday, January 31, 2011 3:09:32 PM(UTC)
pinnocchio

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So, which resistor numbers would be best upgrading for optimal sound quality of the IVY III?
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