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: 139382" data-attributes="member: 652"><p>Re: 60 Degree DIY Mid Hi</p><p></p><p></p><p></p><p><span style="font-family: 'Calibri'"><span style="font-size: 12px"><span style="color: #000000">You are absolutely correct Ivan. I estimated that the I had 10mm from the spacer + about 1mm from the cone offset relative to the frame, plus an additional 2 mm as a result of the suspension flattening as it near its extreme limit.</span></span></span></p><p><span style="font-family: 'Calibri'"><span style="font-size: 12px"><span style="color: #000000"></span></span></span></p><p><span style="font-family: 'Calibri'"><span style="font-size: 12px"><span style="color: #000000">i.e. it could withstand about 13mm of cone travel before it hit the front plate with a 10mm spacer. That corresponds to 2600 watts input per driver at 100Hz – the nominal crossover point.</span></span></span></p><p><span style="font-family: 'Calibri'"><span style="font-size: 12px"><span style="color: #000000"></span></span></span></p><p><span style="font-family: 'Calibri'"><span style="font-size: 12px"><span style="color: #000000">I also looked at the sensitivity to changing the volume between the speaker cone and the horn mouth, and the effect it had on the frequency response. </span></span></span></p><p><span style="font-size: 12px"><span style="color: #000000"><span style="font-family: 'Calibri'"></span></span></span></p><p><span style="font-size: 12px"><span style="color: #000000"><span style="font-family: 'Calibri'">Here is a plot of the cone excursion at 1300 watts per driver, the nominal program rating of the RCF MB12N351. I think 10mm is about right but I figured if I have problems I could add a small spacer. I also assumed at these types of drive levels (2600W) that some dynamic limiting will occur and it would be difficult for a driver with a VC length of 16.5mm and a top plate thickness 11mm to achieve the calculated Xmax.</span></span></span></p><p><span style="font-size: 12px"><span style="color: #000000"><span style="font-family: 'Calibri'"></span></span></span></p><p><span style="font-size: 12px"><span style="color: #000000"><span style="font-family: 'Calibri'"></span></span></span></p></blockquote><p></p>
[QUOTE="Peter Morris, post: 139382, member: 652"] Re: 60 Degree DIY Mid Hi [FONT=Calibri][SIZE=3][COLOR=#000000]You are absolutely correct Ivan. I estimated that the I had 10mm from the spacer + about 1mm from the cone offset relative to the frame, plus an additional 2 mm as a result of the suspension flattening as it near its extreme limit.[/COLOR][/SIZE][/FONT] [FONT=Calibri][SIZE=3][COLOR=#000000] i.e. it could withstand about 13mm of cone travel before it hit the front plate with a 10mm spacer. That corresponds to 2600 watts input per driver at 100Hz – the nominal crossover point.[/COLOR][/SIZE][/FONT] [FONT=Calibri][SIZE=3][COLOR=#000000] I also looked at the sensitivity to changing the volume between the speaker cone and the horn mouth, and the effect it had on the frequency response. [/COLOR][/SIZE][/FONT] [SIZE=3][COLOR=#000000][FONT=Calibri] Here is a plot of the cone excursion at 1300 watts per driver, the nominal program rating of the RCF MB12N351. I think 10mm is about right but I figured if I have problems I could add a small spacer. I also assumed at these types of drive levels (2600W) that some dynamic limiting will occur and it would be difficult for a driver with a VC length of 16.5mm and a top plate thickness 11mm to achieve the calculated Xmax. [/FONT][/COLOR][/SIZE] [/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!