Audio Control 3.1 Capabilities

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Ravendarat

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Posted: April 06, 2006 at 10:35 PM / IP Logged

I have a Audio Control 3.1 that boost the output voltage to 10 volts or so, depending on where its set. What I want to know is if I put a switcher before the preamp for selecting different inputs will it take what ever I put in and boost it to 10 volts or whatever its set at, or will it take whatever the voltage is and add to it. So if Im boosting 4 volts and one source is 2v and one source is 1v will I get matching outputs or will their be a one volt seperation? If anyone knows that would be great

double-secret reverse-osmosis speaker-cone-induced high-level interference distortion, Its a killer

DYohn

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Joined: April 22, 2003

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Posted: April 06, 2006 at 10:46 PM / IP Logged

I think I understand your question. All line drivers (which the THREE.1 includes) have varying outputs depending on input level. None of them are "consistent" (or there would be no volume control.) The 2 or 4 or 10 or 13 volts ratings represent the MAX the units are capable of, not what they output all the time. As long as you have set the input level to handle the max you expect to feed it, anything less will simply result in a lower volume level. Does that answer your question?

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Ravendarat

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Joined: February 23, 2004

Location: Canada

Posted: April 06, 2006 at 10:54 PM / IP Logged

Ya, thats what I was worried about, it means Im screwed. I have a MD Head unit, a changer that runs through the deck, a seperate XM tuner, a DVD, A N64 and a VHS that I plan to run through a switcher and then through the Pre Amp and I have a feeling im gonna run into issues. I guess I can use a seperate line driver to boost all the voltages going into the switcher to the same but thats gonna get pretty expensive and is begging for ground noise I think.

double-secret reverse-osmosis speaker-cone-induced high-level interference distortion, Its a killer

Ravendarat

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Location: Canada

Posted: April 06, 2006 at 10:56 PM / IP Logged

and i know that the pre amp doesnt do a constant output of ten volts I was just using it as an example

double-secret reverse-osmosis speaker-cone-induced high-level interference distortion, Its a killer

stevdart

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Posted: April 06, 2006 at 11:10 PM / IP Logged

Your question made my do a google search because that is something that has always been nagging me somewhere in the dark recesses, too. I'm glad to see that DYohn has responded to your question, as his answer goes along with what I found here:

http://www.analogzone.com/pwrt1020.pdf

In the first part of this, of which I didn't get through very much of, there are these two statements:

"The first stage is a boost-converter because that topology has continuous input current that can be shaped through the use of a multiplier...
However, the boost voltage does not have to be well regulated or fixed because the step-down converter can be designed to handle the variations in voltage. As long as the boost voltage is above the peak input voltage, the converter will regulate properly."

I take from this that a voltage booster is designed on the principle of a multiplier, and that the input voltage will play a role in the outcome. Which means that in your scenario the end voltage of the two sources will be different.

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Audio Control 3.1 Capabilities

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