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
New DIY Mid High (90deg) - AKA PM90
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: 133682" data-attributes="member: 652"><p>Re: New DIY Mid High</p><p></p><p></p><p></p><p><span style="font-family: 'Calibri'"><span style="color: #000000"><span style="font-size: 12px">Thanks Art, </span></span></span></p><p><span style="font-family: 'Calibri'"><span style="color: #000000"><span style="font-size: 12px"></span></span></span></p><p><span style="font-family: 'Calibri'"><span style="color: #000000"><span style="font-size: 12px">As part of my research I did have a look at your design, it looks great but I wanted something that looked a little more conventional for the work I do. If the size was not an issue I would have built a smaller version of Danley’s SH96HO optimised to work above 100Hz. </span></span></span></p><p><span style="font-family: 'Calibri'"><span style="color: #000000"><span style="font-size: 12px"> </span></span></span></p><p><span style="font-family: 'Calibri'"><span style="color: #000000"><span style="font-size: 12px">I have A/B the 4594 and the 4594 HE with some Eighteen Sound drivers - NSD1480N, ND1480 and RCF’s new ND850. </span></span></span></p><p><span style="font-family: 'Calibri'"><span style="color: #000000"><span style="font-size: 12px"></span></span></span></p><p><span style="font-family: 'Calibri'"><span style="color: #000000"><span style="font-size: 12px">The BMS sounded much better; my ears told me exactly what Jack described above. </span></span></span></p><p></p><p><a href="http://www.eighteensound.it/PRODUCTS/Products/CatID/3/ProdID=151#.VLg2a2kbrq4" target="_blank"><span style="font-family: 'Calibri'"><span style="font-size: 12px"><span style="color: #0000ff">http://www.eighteensound.it/PRODUCTS/Products/CatID/3/ProdID=151#.VLg2a2kbrq4</span></span></span></a></p><p><a href="http://www.rcf.it/en_US/products/precision-transducers/neodymium-compression-drivers/nd850" target="_blank"><span style="font-family: 'Calibri'"><span style="font-size: 12px"><span style="color: #0000ff">http://www.rcf.it/en_US/products/precision-transducers/neodymium-compression-drivers/nd850</span></span></span></a></p><p></p><p><span style="font-family: 'Calibri'"><span style="font-size: 12px"><span style="color: #000000">The distortion type, and the frequency where it occurs is the reason – the third harmonic is low in the critical mid band. </span></span></span></p><p><span style="font-family: 'Calibri'"><span style="font-size: 12px"><span style="color: #000000">I used the HE version in this project. I don’t have any distortion figures for this driver but it has shorting rings and should have noticeably lower distortion.</span></span></span></p><p></p><p><span style="font-family: 'Calibri'"><span style="font-size: 12px"><span style="color: #000000">Being a two way driver, the acoustic output is the sum of a 150 watt HF and an 80 watt VHF driver. On a single frequency sin wave test there is no significant advantage compared to a normal driver, but on a complex wave form there is a big advantage. Being able to coherently sum the outputs you can achieve much higher peak SPL’s. You can also design the VHF to be much more efficient, in this case something like 10 - 12dB at 10kHz compared to a DH1A.</span></span></span></p><p></p><p><span style="font-size: 12px"><span style="color: #000000"><span style="font-family: 'Calibri'">Anyway … you need to get yourself a Lake (or similar) and some 4594HE’s to play with … love to see what you could come up with <img src="data:image/gif;base64,R0lGODlhAQABAIAAAAAAAP///yH5BAEAAAAALAAAAAABAAEAAAIBRAA7" class="smilie smilie--sprite smilie--sprite1" alt=":)" title="Smile :)" loading="lazy" data-shortname=":)" />~<img src="data:image/gif;base64,R0lGODlhAQABAIAAAAAAAP///yH5BAEAAAAALAAAAAABAAEAAAIBRAA7" class="smilie smilie--sprite smilie--sprite1" alt=":)" title="Smile :)" loading="lazy" data-shortname=":)" />~:smile: </span></span></span></p></blockquote><p></p>
[QUOTE="Peter Morris, post: 133682, member: 652"] Re: New DIY Mid High [FONT=Calibri][COLOR=#000000][SIZE=3]Thanks Art, As part of my research I did have a look at your design, it looks great but I wanted something that looked a little more conventional for the work I do. If the size was not an issue I would have built a smaller version of Danley’s SH96HO optimised to work above 100Hz. [/SIZE][/COLOR][/FONT] [FONT=Calibri][COLOR=#000000][SIZE=3]I have A/B the 4594 and the 4594 HE with some Eighteen Sound drivers - NSD1480N, ND1480 and RCF’s new ND850. [/SIZE][/COLOR][/FONT] [FONT=Calibri][COLOR=#000000][SIZE=3]The BMS sounded much better; my ears told me exactly what Jack described above. [/SIZE][/COLOR][/FONT] [URL="http://www.eighteensound.it/PRODUCTS/Products/CatID/3/ProdID=151#.VLg2a2kbrq4"][FONT=Calibri][SIZE=3][COLOR=#0000ff]http://www.eighteensound.it/PRODUCTS/Products/CatID/3/ProdID=151#.VLg2a2kbrq4[/COLOR][/SIZE][/FONT][/URL] [URL="http://www.rcf.it/en_US/products/precision-transducers/neodymium-compression-drivers/nd850"][FONT=Calibri][SIZE=3][COLOR=#0000ff]http://www.rcf.it/en_US/products/precision-transducers/neodymium-compression-drivers/nd850[/COLOR][/SIZE][/FONT][/URL] [FONT=Calibri][SIZE=3][COLOR=#000000]The distortion type, and the frequency where it occurs is the reason – the third harmonic is low in the critical mid band. [/COLOR][/SIZE][/FONT] [FONT=Calibri][SIZE=3][COLOR=#000000]I used the HE version in this project. I don’t have any distortion figures for this driver but it has shorting rings and should have noticeably lower distortion.[/COLOR][/SIZE][/FONT] [FONT=Calibri][SIZE=3][COLOR=#000000]Being a two way driver, the acoustic output is the sum of a 150 watt HF and an 80 watt VHF driver. On a single frequency sin wave test there is no significant advantage compared to a normal driver, but on a complex wave form there is a big advantage. Being able to coherently sum the outputs you can achieve much higher peak SPL’s. You can also design the VHF to be much more efficient, in this case something like 10 - 12dB at 10kHz compared to a DH1A.[/COLOR][/SIZE][/FONT] [SIZE=3][COLOR=#000000][FONT=Calibri]Anyway … you need to get yourself a Lake (or similar) and some 4594HE’s to play with … love to see what you could come up with :)~:-)~:smile: [/FONT][/COLOR][/SIZE] [/QUOTE]
Insert quotes…
Verification
Post reply
Home
Forums
Low Earth Orbit
DIY Audio
New DIY Mid High (90deg) - AKA PM90
Top
Bottom
Sign-up
or
log in
to join the discussion today!