Pelican Parts
Parts Catalog Accessories Catalog How To Articles Tech Forums
Call Pelican Parts at 888-280-7799
Shopping Cart Cart | Project List | Order Status | Help



Go Back   Pelican Parts Forums > Miscellaneous and Off Topic Forums > Off Topic Discussions


Reply
 
LinkBack Thread Tools Rate Thread
Author
Thread Post New Thread    Reply
Registered User
 
Tidybuoy's Avatar
 
Join Date: Jun 2003
Location: Fresno, CA
Posts: 6,546
Garage
Another Audiofile Question - Why does volume count down Db's

This is for my own curiosity.

My new Yamaha receiver, when I turn the volume up the display is counting db's down. Anyone know why that is?
__________________
Vern
'06 Cayman S - Arctic Silver, "R" Springs & Struts, Spyder 19" Wheels, 82mm Plenum & Throttle Body.
'74 911 Coupe - Silber Metalic, PMO ITB, Electromotive Mgt
'16 BMW R Nine T (the fun one) & '17 BMW G310R
Old 02-25-2016, 09:54 AM
  Pelican Parts Catalog | Tech Articles | Promos & Specials    Reply With Quote #1 (permalink)
Registered User
 
Join Date: Mar 2003
Location: SW Cheese Country
Posts: 9,263
Garage
It should be counting up. for example when you turn it on and it is at -40db and you turn the volume up it will go to -35db and so on.
__________________
Brent
The X15 was the only aircraft I flew where I was glad the engine quit. - Milt Thompson.

"Don't get so caught up in your right to dissent that you forget your obligation to contribute." Mrs. James to her son Chappie.
Old 02-25-2016, 11:20 AM
  Pelican Parts Catalog | Tech Articles | Promos & Specials    Reply With Quote #2 (permalink)
Used Up User
 
imcarthur's Avatar
 
Join Date: Jun 2003
Location: Toronto
Posts: 8,291
Garage
In layman terms, a volume control reduces the voltage going to the transistors in the amplifier stage, therefore reducing the output down from maximum rated power. In theory, the 0dB setting is the maximum 'clean' power you can attain. Of course, music is not a test tone so the dynamic range of it, the efficiency of your speaker, the air volume you are trying to fill etc etc will all impact this.

Ian
__________________
'87 Carrera Cab

----- “Only two things are infinite, the universe and human stupidity, and I'm not sure about the former.” A. Einstein -----
Old 02-25-2016, 12:57 PM
  Pelican Parts Catalog | Tech Articles | Promos & Specials    Reply With Quote #3 (permalink)
Registered ConfUser
 
Join Date: Aug 2006
Location: Waterlogged in GA
Posts: 12,796
As above, it's a scale of attenuation. At full volume there is no attenuation so it reads zero. At low volume there is a higher amount of attenuation, so a higher value.
__________________
Mike
2011 Ural Patrol 2WD -
1996 Ducati 900SS/CR - Luccia
Old 02-25-2016, 01:41 PM
  Pelican Parts Catalog | Tech Articles | Promos & Specials    Reply With Quote #4 (permalink)
Evil Genius
 
Rusty Heap's Avatar
 
Join Date: May 2006
Location: On top of my BBQ
Posts: 3,605
Garage
db is also logarithmic.


if you want twice the volume, you need 10x the power.


Double amplifier power does not double the volume - Geoff the Grey Geek
__________________
Life is a big ocean to swim in.

Wag more, bark less.
Old 02-25-2016, 01:41 PM
  Pelican Parts Catalog | Tech Articles | Promos & Specials    Reply With Quote #5 (permalink)
Registered User
 
Join Date: Oct 2004
Posts: 12,355
All true above. Still, call me crazy, but I think the volume control display thing is backwards.
Old 02-25-2016, 02:24 PM
  Pelican Parts Catalog | Tech Articles | Promos & Specials    Reply With Quote #6 (permalink)
 
Registered User
 
Join Date: Jan 2002
Location: west michigan
Posts: 2,528
Not all AV receivers show it that way. I owned a Yamaha a few yrs back and it was the same. Have had 2 Sony's since...both show 0 for the lowest volume.
__________________
78 SC Targa Black
84 Carrera Targa White
Old 02-25-2016, 02:52 PM
  Pelican Parts Catalog | Tech Articles | Promos & Specials    Reply With Quote #7 (permalink)
Registered User
 
maxnine11's Avatar
 
Join Date: Jun 2001
Location: western Canada
Posts: 2,227
Garage
I'll only buy it if it goes to "11"
__________________
max
Old 02-25-2016, 03:14 PM
  Pelican Parts Catalog | Tech Articles | Promos & Specials    Reply With Quote #8 (permalink)
Back in the saddle again
 
masraum's Avatar
 
Join Date: Oct 2001
Location: Houston, TX
Posts: 31,592
Quote:
Originally Posted by Tidybuoy View Post
This is for my own curiosity.

My new Yamaha receiver, when I turn the volume up the display is counting db's down. Anyone know why that is?
Are the numbers negative? If the numbers have a - sign, then they aren't counting down, they're counting up. -40 is "smaller" than -35.
__________________
Steve
'08 Boxster RS60 Spyder #0099/1960
- never named a car before, but this is Charlotte.
'88 targa SOLD 2004 - gone but not forgotten
Old 02-25-2016, 03:41 PM
  Pelican Parts Catalog | Tech Articles | Promos & Specials    Reply With Quote #9 (permalink)
Registered User
 
Tidybuoy's Avatar
 
Join Date: Jun 2003
Location: Fresno, CA
Posts: 6,546
Garage
Thanks for the explanations. I guess the numbers are actually counting up but starting with a negative number. After reading this thread and some info on the net I have a better understanding of why.

With the new receiver and subs, I can't imagine ever getting to zero db.
__________________
Vern
'06 Cayman S - Arctic Silver, "R" Springs & Struts, Spyder 19" Wheels, 82mm Plenum & Throttle Body.
'74 911 Coupe - Silber Metalic, PMO ITB, Electromotive Mgt
'16 BMW R Nine T (the fun one) & '17 BMW G310R
Old 02-25-2016, 04:05 PM
  Pelican Parts Catalog | Tech Articles | Promos & Specials    Reply With Quote #10 (permalink)
Band.
 
Join Date: Dec 2003
Location: Denver, CO
Posts: 12,424
Send a message via AIM to Gogar
Quote:
Originally Posted by Tidybuoy View Post
With the new receiver and subs, I can't imagine ever getting to zero db.
Totally!

There actually are "standards" (for movies, anyway) that state certain levels of audio to be on the digital recording, and the system can be calibrated to produce a certain SPL of audio through the speakers with a test noise. Assuming your speakers have a certain capability and your room is perfect and your Johnson rod and muffler bearings are in a certain state of tune, etc. etc.

Music recordings aren't bound by these guidelines and as such they cram their level on the recording all the way to the top. You might find that the loudest you can stand is somewhere between -30 and -18 on your readout there, depending on the kind of music. (very very simplified explanation, though.)

But yeah, for the real world, the plus sign on the remote means louder and the minus sign means quieter.
__________________
1983 SC Coupe 1972 911T Targa
1972 Triumph Tiger 1995 Triumph Daytona SuperIII
1996 Ducati 900 SS/SP 1963 BMW R60/2
1973 Honda CB350F
Old 02-25-2016, 05:55 PM
  Pelican Parts Catalog | Tech Articles | Promos & Specials    Reply With Quote #11 (permalink)
Registered User
 
Cajundaddy's Avatar
 
Join Date: Sep 2010
Location: Cucamonga CA
Posts: 3,283
Garage
It's a marketing thing mostly I suspect. I also have a Yamaha receiver that has this and it works fine but seems dumb. For math geeks, if you have a 100w receiver and you are at minus 20db you are at approximately 1w of output power.
__________________
2009 Cayman PDK
With a few tweaks
Old 02-25-2016, 06:00 PM
  Pelican Parts Catalog | Tech Articles | Promos & Specials    Reply With Quote #12 (permalink)
 
Reply

Thread Tools
Rate This Thread
Rate This Thread:

 


All times are GMT -8. The time now is 10:54 PM.


 
Powered by vBulletin® Version 3.8.7
Copyright ©2000 - 2019, vBulletin Solutions, Inc.
Search Engine Optimization by vBSEO 3.6.0
Copyright 2018 Pelican Parts, LLC - Posts may be archived for display on the Pelican Parts Website -    DMCA Registered Agent Contact Page
 

DTO Garage Plus vBulletin Plugins by Drive Thru Online, Inc.