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volume pot question, help.
volume pot question, help.
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Old 23rd August 2011, 09:03 PM   #1
trmntr is offline trmntr
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Default volume pot question, help.

Hi everyone, I'm Bruno from Uruguay, I'm very new about this audiophile world, even more on the DIY.

I have just brought an tube pre-amp kit from analogmetric, as an audio POT, im going to start building soon, im going to pair this preamp with 2xPA150 (3xLM3886 each) but I dont know where to put the volume pot, if in the preamp or in the poweramp.

So guys what do you say?


Greetings,

Bruno
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Old 23rd August 2011, 09:54 PM   #2
mikejennens is offline mikejennens  United States
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volume pot question, help.
I would put it in the preamp, on the inputs.
Mike
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Old 23rd August 2011, 10:50 PM   #3
tinitus is offline tinitus  Europe
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volume pot question, help.
what is input impedance of your power amp ?

and what is gain/output of your preamp ?

how much voltage out from your source ?
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Old 23rd August 2011, 11:02 PM   #4
vacuphile is offline vacuphile  Netherlands
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Many amps have down sloping distortion (less distortion at higher gain). In such a case, it is better to have the pot at the end of the preamp. It will also be better from a noise point of view. You need to match the input level, however, so that the preamp will be operating in its optimum region on the input signal you will provide.

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Old 24th August 2011, 01:20 AM   #5
tinitus is offline tinitus  Europe
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volume pot question, help.
hey, it appeared tricky to find your thread when not on front page
so I moved you to tube amp forum
hope its ok


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Old 24th August 2011, 01:42 PM   #6
razorrick1293 is offline razorrick1293  United Kingdom
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with a low e nought value pot noise shouldnt be too much of a problem, either that or is it possible to put the volume pot after the first gain stage?
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