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bbjai

Passive Volume Controller

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Hi

This is my current setup,I play mainly from my macbook with lossless.

Speakers: Audioengine A2

Sub: Audioengine S8

DAC: Kingrex UD01

PSU for DAC: Kingrex PSU

I noticed the volume management isn't that great (OSX keeps booting up with my DAC on full volume). Is there some sort of passive power control that I can get? And does it fit between my DAC and the speakers?

cheers

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Sorry bbjai, this isn't responding to your question, however, I was wondering whether you found much difference in sq with the UD-01 with/without the PSU? I have a UD-01 and have just ordered the psu.

I have limited knowledge about the technical side, so I hope someone with more knowledge will jump in and answer your question, but I understood that to get bit perfect sound you should have the system volume set to 100% and that the Mac usually did that automatically when you connected the Dac. That's what I do and control the volume with my amplifier.

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To answer your first question the UD-01 is indeed quite different with the PSU. Its like when i put the DAC in at first there sounded like no difference, but like once I got the PSU it sounded great!!! like the clarity was there.

MY problem with the setup is I don't have a amplifier as the interconnects run from the DAC -> Sub -> Speakers. That way I can use the crossover and Phase on the Sub. I need a volume control but not sure what I should be getting. I' tried googling it to no luck

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Possible solution - leave your sub unpowered until the Mac is booted and volume set correctly.

Next possible solution - Were you thinking of a volume pot with a knob on it so you can physically adjust the volume? That is possible and could be very cheap as a DIY project. Not sure if you want a cheap or expensive solution though. You would need to find out the output impedance of your DAC and the input impedance of your amp to know if it could be done.

Hi-end solution - commercial passive preamp, or George's Lightspeed Attenuator, or Pass B1 preamp, or similar.

Just ideas...

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yeh I'm going to try out the channel island audio passive Pre from Dlite and see how it goes if i like it ill keep it!!

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