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Buffalo II into LDR or Volumite? Options · View
Janedoe
Posted: Thursday, July 29, 2010 12:44:12 AM
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Hi guys,

a newbie here. Will like to check if it is suitable (and recommended) that I connect the BuffaloII DAC to a Light Dependent Resistor. How will it compare to a Volumite?

Thanks
schnak
Posted: Thursday, July 29, 2010 4:13:15 AM
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Location: seattle, wa
I have a LDR preamp I made from a kit I got from Uriah. http://www.buildanamp.com It sounds very clean and like it a lot. I havent hear a volumite. I made input switching on my LDR so it isnt the same. I can select 4 analog inputs-dac, phono, tuner, 78s, mp3 player, ect. A volumite is for the dac only. I also use a Mux so I have 4 digital inputs on the dac.
Janedoe
Posted: Thursday, July 29, 2010 6:35:39 AM
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schnak wrote:
I have a LDR preamp I made from a kit I got from Uriah. http://www.buildanamp.com It sounds very clean and like it a lot. I havent hear a volumite. I made input switching on my LDR so it isnt the same. I can select 4 analog inputs-dac, phono, tuner, 78s, mp3 player, ect. A volumite is for the dac only. I also use a Mux so I have 4 digital inputs on the dac.


schnak, thanks. What is the output impedance of the twisted pear bufaloII DAC? for match to the LDR. Thanks

Regards, Alfred
schnak
Posted: Thursday, July 29, 2010 2:04:56 PM
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IIRC it is less than 10 ohms. I use a jolida tube amp with high impedence so the combo sounds great. I am gathering the parts for a balanced LDR next. Then if TPA finishes the retro both digital and vinyl will be balanced.
dglow
Posted: Thursday, July 29, 2010 3:20:25 PM
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ESS's Sabre whitepaper discusses the volume control: it's implemented directly in the DAC's silicon and smoothly transitions between volume steps. AFAIK, Volumite simply provides us a control mechanism for 9018's native attenuation.
Brian Donegan
Posted: Thursday, July 29, 2010 8:00:04 PM

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Quote:
schnak, thanks. What is the output impedance of the twisted pear bufaloII DAC?


The output impedance of the IVY is less then 10m-ohm.

Quote:
AFAIK, Volumite simply provides us a control mechanism for 9018's native attenuation.


correct, it is the cleanest possible solution for volume for the DAC.
orpheus
Posted: Monday, August 09, 2010 9:12:30 PM
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Janedoe wrote:
Hi guys,

a newbie here. Will like to check if it is suitable (and recommended) that I connect the BuffaloII DAC to a Light Dependent Resistor. How will it compare to a Volumite?

Thanks


Are you using the DAC balanced or single ended? If you have to implement a balanced volume control with LDR's, you get into matching issues because balanced sets are fairly rare. I thought about the same thing, and decided to use the volumite for now. It isn't expensive, and if you decide to build a LDR based preamp or buffer, you can always just turn the volumite all the way up and it is like it isn't even there.


Get the volumite and try it, it isn't expensive.

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