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Can you still contol the volume?

Posted by Slider on January 30, 2010 at 08:43:41

In Reply to: Poll: agree or disagree - "You can't replace a volume pot with a single resistor." posted by hukkfinn on January 30, 2010 at 08:22:06:

I don't think it's completely clear what you had done. In your original post you said it was bypassed, and here you say replaced. Was the intent to remove the VC and have it set to a specific volume using a fixed resistor? If so, Al is correct, you would need a voltage divider with 2 resistors. However, it is also likely that the amp stage following the VC had a input resistor too, so could be used as the shunt leg, albeit with a resistor value that would likely be higher than optimum, and may lead to frequency response changes due to interaction with the input impedances of the following stage. Or most likely, the pot could've been left in and rewired as the shunt leg. That would've been a poor choice though, since the pot would still be part of the circuit, so little would be gained by using the fixed resistor, though it shouldn't degrade the sound too much if done correctly. It would still have a higher series resistance than you had before for the same volume, so there may be some high frequency rolloff depending on the input capacitance of the next stage.

Edits: 01/30/10

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