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Hello. I was wondering if anyone knows why volume nobs/increments on av receivers are in -dB? (ex. -35dB)
I've heard that 0 is some sort of reference level.
Thank you
I've heard that 0 is some sort of reference level.
Thank you
-
Bowers & Wilkins 683 Speakers
Rotel RB-1090 2 Channel Amp
Rotel RC-1082 Stereo Pre Amp
Rotel RCD-1072 CD Player
Pro-Ject Debut Carbon w/ Ortofon 2M Red (sitting on a piece of slate supported by 3 "solid tech feet of silence" isolation feet)
Rotel RLC-1040 Power Conditioner
Shynyata Research SR-Z1 Power Outlet & Venom 3 Power Cords x 4
Tara Labs RSC Vector 1 Speaker Cables & Interconnects
Pioneer PDP-5070HD 50" Plasma
Playstation 3
Shaw HD PVR
Primacoustic Room Treatments -
When the volume control reads 0dB it's supposed to be unity gain, meaning there's no difference in level between the signal coming into the preamp stage and what is being output to the amplifiers. It's like going straight from the source into the amp with nothing in between.
Most of a preamp's life is spent attenuating the incoming signals and that is why they are shown in negative numbers and count up to 0dB. Once you get in the positive number range the preamp is applying gain (slightly amplifying it) before it enters the amps.
I hope that makes sense.
Eric
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