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-   -   Line Source Dipole Subwoofer (http://www.diyaudio.com/forums/planars-exotics/192264-line-source-dipole-subwoofer.html)

dkxdn 8th July 2011 02:54 PM

Line Source Dipole Subwoofer
 
Hi

For 2 month ago I received my beloved Magnepan 1.7 but from the start they needed some assistant in the lower part.

Then I designed a line source dipole subwoofer:
4 x Peerless SLS 400 – 830867 pr side. And I used the sidewalls for the outside baffle – see picture:

http://www.hifi4all.dk/forum/uploads...3_120612_9.jpg

To get the same finish as the Magnepan 1.7 I orderd two “Socks” directly from Magnepan – great service and in a week I receive them here in Denmark !

More pictures:
http://www.hifi4all.dk/forum/uploads...436_stuen1.jpg

http://www.hifi4all.dk/forum/uploads...6_magfront.jpg

http://www.hifi4all.dk/forum/uploads..._magbehind.jpg

http://www.hifi4all.dk/forum/uploads...magbehind3.jpg

CharlieM 8th July 2011 05:17 PM

I really like that woofer setup and it looks great too!
How are you liking it's sound?

geraldfryjr 8th July 2011 05:33 PM

I like this concept very much!
I too had been think about some thing similar, latey I have been playing with woofers firing into the corners of the room.
Please elaborate some more If you would!

jer

dkxdn 8th July 2011 07:25 PM

Most importend to integreat a subwoofer to the Magnepan 1.7 is to have the same Sound direction: Linesource and Dipole - with out these two they Will never play together -thats my meaning !
Later this weekend I'll publish some messurement

geraldfryjr 8th July 2011 07:50 PM

This is an idea that might work for me as my room is only 10.5 feet wide and 18.5 feet long.

I will be looking foward to your next report!:) jer

dkxdn 17th July 2011 12:46 PM

And here comes the measurements of the subwoofer alone:
All measurements are made from my listen place with a window on 60msec and smoothing = 1/N=5

http://www.hifi4all.dk/forum/uploads..._filter400.jpg
A: Blue Left, B: Red Right without crossover & eq

http://www.hifi4all.dk/forum/uploads...er_+_eq400.jpg
A: Blue Left without crossover+eq, B: Red with crossover: 75 hz-48db/octave + par eq at 20hz, 80hz & 165hz and hishelf from 90hz - yes many function on my Lyngdorf

http://www.hifi4all.dk/forum/uploads..._filter400.jpg
Difference on left and right

a.wayne 18th July 2011 12:22 AM

Hello ,

Nice work , i love the look and being that close to the side walls will help the bass , but i cannot see it not affecting the sound of the 1.7's ....

why not seperate them ...... :note:

dkxdn 18th July 2011 12:50 PM

Space neded ! If I had another room = Wider then ...
But I will try to put the Maggie with the tweeter outside and about 10cm from the subwoofer.

petegt 28th July 2011 03:42 PM

Sorry I may be missing something here but what is the point in this?

Considering that the bass coming from your subwoofers is omnidirectional (Definitly true for 80hz down but the effect starts at arround 150hz)

The only directional tone you will be able to hear from them is the harmonic distortion.

CLS 29th July 2011 05:21 AM

It's dipole, not monople or omni.

Have you ever heard dipole bass?


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