Forums
New posts
Search forums
What's new
New posts
Latest activity
Members
Registered members
Current visitors
Log in
Register
What's new
Search
Search
Search titles only
By:
New posts
Search forums
Menu
Log in
Register
Install the app
Install
Audio and Video Talk
General Discussion
Speaker Efficiency Question....
JavaScript is disabled. For a better experience, please enable JavaScript in your browser before proceeding.
You are using an out of date browser. It may not display this or other websites correctly.
You should upgrade or use an
alternative browser
.
Reply to thread
Help Support AVForums:
This site may earn a commission from merchant affiliate links, including eBay, Amazon, and others.
Message
<blockquote data-quote="ludo" data-source="post: 75155" data-attributes="member: 691"><p>Going somewhat off topic but hopefully to clarify something for Big G. </p><p></p><p>I suspect RF fundis like DRNB think more in terms of power and some midnight hackers think more in terms of voltage. With metering on preamps and audio mixers it's the signal voltage we think about with modern gear (even though the usual reference voltages like dBu have their roots long ago in a power level of 1 milliWatt.) </p><p></p><p>So while the formula for power is just as DRNB gave it, to calculate voltage difference you'd use:</p><p></p><p>dB = 20 log Vratio</p><p></p><p>So a doubling of <em>voltage</em> is indeed 6dB extra, which gives a quadrupling of power (the same 6dB extra) if the load impedance stays the same. This may be what the music college were trying to get at? What it means in terms of how loud things seem to us, is too ghastly to contemplate. But it helps to keep us well away from gross distortion/clipping in the preamp stages at least. Power and how it treats our speakers is our last problem, and a big one.</p><p></p><p></p><p></p><p>You have a fine approach to loudness wars in a band sir!</p></blockquote><p></p>
[QUOTE="ludo, post: 75155, member: 691"] Going somewhat off topic but hopefully to clarify something for Big G. I suspect RF fundis like DRNB think more in terms of power and some midnight hackers think more in terms of voltage. With metering on preamps and audio mixers it's the signal voltage we think about with modern gear (even though the usual reference voltages like dBu have their roots long ago in a power level of 1 milliWatt.) So while the formula for power is just as DRNB gave it, to calculate voltage difference you'd use: dB = 20 log Vratio So a doubling of [i]voltage[/i] is indeed 6dB extra, which gives a quadrupling of power (the same 6dB extra) if the load impedance stays the same. This may be what the music college were trying to get at? What it means in terms of how loud things seem to us, is too ghastly to contemplate. But it helps to keep us well away from gross distortion/clipping in the preamp stages at least. Power and how it treats our speakers is our last problem, and a big one. You have a fine approach to loudness wars in a band sir! [/QUOTE]
Insert quotes…
Verification
Post reply
Audio and Video Talk
General Discussion
Speaker Efficiency Question....
Top