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
Low Earth Orbit
DIY Audio
B&C Sub designs
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="Alan Sledzieski" data-source="post: 60112" data-attributes="member: 1022"><p>Re: B&C Sub designs</p><p></p><p>You should see what a double 18 in one inclosure looks like,</p><p></p><p>Inside dimensions, 48, 26.5, 19.5</p><p> Fb 38</p><p>F3 38.5</p><p></p><p>6 db louder all over with same power input. </p><p></p><p> Acoustic power</p><p></p><p><span style="font-family: 'Arial'"><span style="font-size: 10px"><strong>Why show acoustic power instead of sound pressure?</strong></span></span></p><p> <span style="font-family: 'Arial'"><span style="font-size: 10px">The acoustic power is the total power radiating from the speaker in every direction. As such, the acoustic power level includes the on-axis sound waves as well as the off-axis sound waves that radiate into the room at other angles, adding to the total perceived loudness. This is important because most speakers are fairly omnidirectional at low frequencies. So much of their sound energy will radiate off-axis. In contrast, the sound pressure level is valid at only one location, usually on-axis from the speaker, and it does not include the sound that radiates at other angles. Because of this, comparisons of maximum low-frequency loudness between different box designs are more accurate when using acoustic power.</span></span></p><p> </p><p> <span style="font-family: 'Arial'"><span style="font-size: 10px"><strong>What happens when an excursion limit is exceeded?</strong></span></span></p><p> <span style="font-family: 'Arial'"><span style="font-size: 10px">When a driver is pushed beyond its Xmax limit, it becomes increasingly nonlinear so its nonlinear distortion rises. If the driver is pushed hard enough it will reach its mechanical excursion limit (Xmech). When Xmech is reached, the driver may suffer physical damage like a torn spider or surround or a damaged coil former. The Cone Displacement graph shows just how far the driver's piston must move for a particular input power or voltage level.</span></span></p></blockquote><p></p>
[QUOTE="Alan Sledzieski, post: 60112, member: 1022"] Re: B&C Sub designs You should see what a double 18 in one inclosure looks like, Inside dimensions, 48, 26.5, 19.5 Fb 38 F3 38.5 6 db louder all over with same power input. Acoustic power [FONT=Arial][SIZE=2][B]Why show acoustic power instead of sound pressure?[/B][/SIZE][/FONT] [FONT=Arial][SIZE=2]The acoustic power is the total power radiating from the speaker in every direction. As such, the acoustic power level includes the on-axis sound waves as well as the off-axis sound waves that radiate into the room at other angles, adding to the total perceived loudness. This is important because most speakers are fairly omnidirectional at low frequencies. So much of their sound energy will radiate off-axis. In contrast, the sound pressure level is valid at only one location, usually on-axis from the speaker, and it does not include the sound that radiates at other angles. Because of this, comparisons of maximum low-frequency loudness between different box designs are more accurate when using acoustic power.[/SIZE][/FONT] [FONT=Arial][SIZE=2] [/SIZE][/FONT] [FONT=Arial][SIZE=2][B]What happens when an excursion limit is exceeded?[/B][/SIZE][/FONT] [FONT=Arial][SIZE=2]When a driver is pushed beyond its Xmax limit, it becomes increasingly nonlinear so its nonlinear distortion rises. If the driver is pushed hard enough it will reach its mechanical excursion limit (Xmech). When Xmech is reached, the driver may suffer physical damage like a torn spider or surround or a damaged coil former. The Cone Displacement graph shows just how far the driver's piston must move for a particular input power or voltage level.[/SIZE][/FONT] [FONT=Arial][SIZE=2] [/SIZE][/FONT] [/QUOTE]
Insert quotes…
Verification
Post reply
Home
Forums
Low Earth Orbit
DIY Audio
B&C Sub designs
Top
Bottom
Sign-up
or
log in
to join the discussion today!