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
60 Degree DIY Mid Hi - AKA PM60
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="Peter Morris" data-source="post: 206939" data-attributes="member: 652"><p>There are a couple of issues razing the crossover frequency. As you noted the dipole arrangement means the vertical pattern collapses as as the frequency increases, in this respect I would suggest that 700 – 800 Hz is about as high as you should go. In addition this is a bent horn and its dimensions suggest this is also about as high it should go.</p><p></p><p>Part of this design is keeping all the diaphragms operating in their piston range. By doing this all the lumps and bumps in the frequency response can be corrected successfully with DSP. A 12” driver's piston range starts to run out at about 800Hz. </p><p></p><p>From my SIMs very minor vertical lob-ing starts at a crossover frequency of about 500Hz, but it does not become an issue untill the crossover is greater than 800Hz. This of course only occurs through the narrow crossover region.</p><p></p><p>My pick is 700Hz as a maximum. 600Hz as a minimum for the 60 degree and 650Hz for the 90 degree.</p></blockquote><p></p>
[QUOTE="Peter Morris, post: 206939, member: 652"] There are a couple of issues razing the crossover frequency. As you noted the dipole arrangement means the vertical pattern collapses as as the frequency increases, in this respect I would suggest that 700 – 800 Hz is about as high as you should go. In addition this is a bent horn and its dimensions suggest this is also about as high it should go. Part of this design is keeping all the diaphragms operating in their piston range. By doing this all the lumps and bumps in the frequency response can be corrected successfully with DSP. A 12” driver's piston range starts to run out at about 800Hz. From my SIMs very minor vertical lob-ing starts at a crossover frequency of about 500Hz, but it does not become an issue untill the crossover is greater than 800Hz. This of course only occurs through the narrow crossover region. My pick is 700Hz as a maximum. 600Hz as a minimum for the 60 degree and 650Hz for the 90 degree. [/QUOTE]
Insert quotes…
Verification
Post reply
Home
Forums
Low Earth Orbit
DIY Audio
60 Degree DIY Mid Hi - AKA PM60
Top
Bottom
Sign-up
or
log in
to join the discussion today!