Log in
Register
Home
Forums
New posts
Search forums
What's new
New posts
New profile posts
Latest activity
News
Members
Current visitors
New profile posts
Search profile posts
Features
Log in
Register
Search
Search titles only
By:
Search titles only
By:
New posts
Search forums
Menu
Install the app
Install
Reply to thread
Home
Forums
Pro Audio
Junior Varsity
Thoughts about amplifiers at 3/4 volume.
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
.
Message
<blockquote data-quote="Jeff Hague" data-source="post: 27353" data-attributes="member: 128"><p>Re: Thoughts about amplifiers at 3/4 volume.</p><p></p><p>I agree that most of the noise in a system originates upstream of the amps so S/N really is no reason to turn the trims down anymore.</p><p>I am curious about another possible reason for doing so and that is to keep the crossover outputs close in level to each other to avoid bands overlapping.</p><p>I know the graphics from Driveware may be a bit oversimplified but I think these illustrate my point.</p><p>In the first attached graphic, all 3 outputs are set to 0dB and there is minimal overlap between bands. (It actually seems like in reality there should be a bit of a gap between the bands so they sum at 0 but again, the graphics probably arent very accurate.)</p><p>In the second attached graphic, the mid output is at +6dB relative to the low and high outputs and it shows significant overlap between bands.</p><p>It seems to me that leaving the crossover outputs near equal to each other and using the trims on the amps to control the overall output of the individual bands reduces that overlap.</p><p>Ofcourse in a perfect world the output power amps would be a perfect match for the efficiency and # of drivers in each band but how often does that happen?</p><p>Does this sound right or am I missing something (again)?</p><p></p><p>PS - Isnt it possible to somehow insert these graphics inline with the thread?</p></blockquote><p></p>
[QUOTE="Jeff Hague, post: 27353, member: 128"] Re: Thoughts about amplifiers at 3/4 volume. I agree that most of the noise in a system originates upstream of the amps so S/N really is no reason to turn the trims down anymore. I am curious about another possible reason for doing so and that is to keep the crossover outputs close in level to each other to avoid bands overlapping. I know the graphics from Driveware may be a bit oversimplified but I think these illustrate my point. In the first attached graphic, all 3 outputs are set to 0dB and there is minimal overlap between bands. (It actually seems like in reality there should be a bit of a gap between the bands so they sum at 0 but again, the graphics probably arent very accurate.) In the second attached graphic, the mid output is at +6dB relative to the low and high outputs and it shows significant overlap between bands. It seems to me that leaving the crossover outputs near equal to each other and using the trims on the amps to control the overall output of the individual bands reduces that overlap. Ofcourse in a perfect world the output power amps would be a perfect match for the efficiency and # of drivers in each band but how often does that happen? Does this sound right or am I missing something (again)? PS - Isnt it possible to somehow insert these graphics inline with the thread? [/QUOTE]
Insert quotes…
Verification
Post reply
Home
Forums
Pro Audio
Junior Varsity
Thoughts about amplifiers at 3/4 volume.
Top
Bottom
Sign-up
or
log in
to join the discussion today!