New Posts New Posts RSS Feed - Amplifier voltage
  FAQ FAQ  Forum Search   Events   Register Register  Login Login

Welcome to the Graham Slee Audio Products Owners Club

 

Open to all owners plus those contemplating the purchase of a Graham Slee audio product wishing to use our loaner program: join here
Subscribe to our newsletter here (Rules on posting can be found here)


Amplifier voltage

 Post Reply Post Reply
Author
Analog Kid View Drop Down
Senior Member
Senior Member


Joined: 07 Mar 2008
Location: Germany
Status: Offline
Points: 204
Post Options Post Options   Thanks (0) Thanks(0)   Quote Analog Kid Quote  Post ReplyReply Direct Link To This Post Topic: Amplifier voltage
    Posted: 17 Apr 2008 at 4:40pm
If I take a 120 volt amplifier from the U.S. and connect it to a 240 volt output in Australia, is it true it will be about twice as loud?


Back to Top
Graham Slee View Drop Down
Admin Group
Admin Group
Avatar
Telling it as it is

Joined: 11 Jan 2008
Location: South Yorkshire
Status: Offline
Points: 8813
Post Options Post Options   Thanks (0) Thanks(0)   Quote Graham Slee Quote  Post ReplyReply Direct Link To This Post Posted: 17 Apr 2008 at 9:35pm
Well...

Provided nothing went bang which it surely would, then

Power = rms voltage squared over load impedance

And therefore it would produce four times the power.

However, four times the power is only 6dB(SPL) but you'd need 10dB(SPL) for it to sound twice as loud.

10dB(SPL) equates to 10 times the power  which sounds twice as loud, 20dB(SPL) equates to 100 times the power which sounds twice as loud again, etc.

Power to sound pressure level (SPL) = log10 to base ten of watts multiplied by 10, in dB

SPL to power = antilog to base 10 (dB(SPL)/10), in watts

Complicated isn't it, but the human/energy relationship is a logarithmic one.
Not simple enough for Google-Bot to understand...
Back to Top
 Post Reply Post Reply
  Share Topic   

Forum Jump Forum Permissions View Drop Down

Forum Software by Web Wiz Forums® version 12.01
Copyright ©2001-2018 Web Wiz Ltd.

This page was generated in 0.094 seconds.