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In Reply to: RE: Volume vs Gain posted by davidandcandy@gmail.com on August 11, 2015 at 13:26:21:
The gain of a given circuit is whatever is is.A volume control is just a voltage divider. Some of the signal voltage is lost across a resistor and turned into heat.
When you lower the volume control you are lowering the total system gain. That lowers the SPL (volume) in the room.
A phono cartridge has a very low voltage output so the phono preamp is meant to increase that voltage to match line level signal sources (CD player, etc.).
I hope this helps.
Tre'
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"Still Working the Problem"
Edits: 08/11/15
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Follow Ups
- RE: Volume vs Gain - Tre' 13:43:39 08/11/15 (3)
- Or a transformer, or a photo diode, or digital based....nt - kuribo 15:07:16 08/11/15 (1)
- RE: Or a transformer, or a photo diode, or digital based....nt - Tre' 18:55:07 08/11/15 (0)
- Excellent explanations, Tre'. - Duster 14:59:11 08/11/15 (0)