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Location: Tauranga - New Zealand
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Just so I can make an informed descision re upgrading a couple of questions guys.
To replicate my current setup of Buffalo 24 driving Ivy using both ballanced and SE out if I were to go Counterpoint/Ballsie - then.
1 - I would need two Counterpoints to run the ballanced amps and a Ballsie tagged onto the outputs to drive the SE plate amps ?
2 - Ideally I would then need another bipolar supply for the Ballsie or can this be powered off the Counterpoint supply ?
3 - Running this way I have no issues with thumps.?
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Rank: Administration
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Hi Wobbly,
1) Yes.
2) I would use just one supply.
3) I can't say for sure, I have not tried it, but I think you probably would not. That said we may have a better option for you soon. Look for something in the next few weeks.
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Rank: Member
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Location: Tauranga - New Zealand
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Thanks Russ,I cant help but ask - the IVY is a ballanced I/V with SE converters tagged onto the outputs.
If the Counterpoint is technically/aurally superior to the IVY would this not have been the preferred I/V,with a SE stage tagged on the outputs, for the Buffalo 32 - thumps notwithstanding.
But then we have IVY2 as well in the mix - and the question here is - can or will it be possible to convert the original IVY to IVY2 with component changes or is it a vastly different circuit config.
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Rank: Administration
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Buffalo32S and IVY II use a novel technique that totally eliminates the "need" for a BAL/SE converter. :) It a completely new beast.
That said, we have a cool little cct that people can use if they want extra SE headroom. But its not released just yet.
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Rank: Advanced Member
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wobbly wrote:If the Counterpoint is technically/aurally superior to the IVY would this not have been the preferred I/V,with a SE stage tagged on the outputs, for the Buffalo 32 - thumps notwithstanding. I was wondering the same thing. 
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Rank: Administration
Groups: Administration, Customer
Joined: 10/24/2006(UTC)
Posts: 3,979
Location: Nashville, TN
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I certainly don't think and have never said that Counterpoint is superior to IVY I or IVY II. :)
Also, Take off the feedback caps(C1 and C2) on the original IVY an you will improve it. This is something I only proved to myself lately.
The bottom line is, the OPA1632/THS4131 etc do not like a capacitive load at all, and it quickly makes THD climb.
IVY II does not use any FB caps in the I/V stage, just a passive low order filter.
Cheers!
Russ
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Rank: Advanced Member
Groups: Member
Joined: 1/11/2009(UTC)
Posts: 70
Location: Greece
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Russ White wrote:I certainly don't think and have never said that Counterpoint is superior to IVY I or IVY II. :)
Also, Take off the feedback caps(C1 and C2) on the original IVY an you will improve it. This is something I only proved to myself lately.
The bottom line is, the OPA1632/THS4131 etc do not like a capacitive load at all, and it quickly makes THD climb.
IVY II does not use any FB caps in the I/V stage, just a passive low order filter.
Cheers!
Russ Thanks for the input! Btw Russ, how does the OPA1632 compare to the LM4562? :) Edited by user Sunday, April 12, 2009 10:20:41 AM(UTC)
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