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Volume control resistance question? Step Attenuator?
Volume control resistance question? Step Attenuator?
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Old 12th January 2011, 12:39 AM   #1
HP8903B is offline HP8903B
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Default Volume control resistance question? Step Attenuator?


Last edited by HP8903B; 12th August 2016 at 11:09 PM.
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Old 12th January 2011, 12:50 AM   #2
wakibaki is offline wakibaki  United Kingdom
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The short answer is no. Replacing the volume pot with a lower value pot will only worsen the situation.

Basically you haven't got enough gain in the system (insufficient voltage) or you have insufficient power driving the speakers. This is odd. Most modern sources (CD players, MP3 players) have ample output voltages, and you have a preamp anyway, which is intended to provide some signal amplification from e.g. a magnetic cartridge to drive a power amplifier.

Tell us what is in the rest of the system, from source to speakers.

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Old 12th January 2011, 01:08 AM   #3
tomchr is offline tomchr  Canada
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I second waki's short answer. Changing the volume control pot will not improve the situation.

A 47~100 kOhm pot should be fine for a volume control.

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Old 12th January 2011, 10:10 AM   #4
Mr. Triatic is offline Mr. Triatic  Sweden
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Waki´s right, worth to note is that a 100k pot and mr. Miller can throw a unwanted party and affect your amplifiers frequency response, you are better off with a 50k pot.

Still, if your amp is designed with a 100k pot i suggest you stick with that value and solve your gainproblem maybe with a preamplifier.

Last edited by Mr. Triatic; 12th January 2011 at 10:13 AM.
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