The Kjeldsen OB build thread

[Kjeldsen]

Both black. I will see how much it will cost covered with PU leather. For this I will have to find a craftsman

 

[heinz1964]

Ripole / W baffle

Hi

The reason why you you do not use the ripole is that because you need to be able to go higher in frequency?

I have 2 12" woofers and want to go with the W shape for bas.

My midrange will probably be the 9½" SB satori woofer, that can go deep enough for a W baffle bas, I hope.

Tweeter is the big ESS AMT1.

best regards

Uwe

 

[Kjeldsen]

I tried Ripole but could not hear or measure any significant diffence. Also I would like to go as high as possible.

 

[korpberget]

Nice build!
I tried barrel type H-frame once. Made it out of an old kickdrum

 

[Kjeldsen]

Little issue occurred. I like to mount units from back, but for the fullrange too little wood is left for proper fixture. One screw went through and one hit a knot. It made some cosmetic damage. I had to mount differently.

 

[Kjeldsen]

I have tried stuffing the u baffle pretty dense. This was not a good idea. No deep bas, and more a honk sound, than oomph. Stuffing out and new DSP settings is much better and natural sounding.

 

[Kjeldsen]

The mdf tube turned out to be too light for high volumes. I bought four rings made of concrete. Less than 100 $ delivered to my doorstep.

 

[heinz1964]

Hi Kjeldsen

The ripole you tried, was it with a single unit only?

If you use only one unit there is no force cancellation. That is my main goal with the W baffle.

Best regards
Uwe

 

[Kjeldsen]

Yes, that was single driver. It was just to try the potential of this construction. I prefer the more simple u baffle simply because its easy too build. The ripole did not outperform the others.

 

[heinz1964]

Ripole has a slimmer appearance though and with two you have force cancellation. And that should outperform two on a normal baffle.

 

[Kjeldsen]

Its not that slim, look at my barrels, they would approx be the front in a ripole with just one woofer, with two woofers they would be even wider. The cancelation is off course a big bonus. I have tried with four woofers, but even with cancelation the single 15 inch outperforms the four 10 inch arrangement.

 

[heinz1964]

What 10" did you use?

 

[Kjeldsen]

Vifa OEM with pp diaphragm, foam surround, stamped chassis and relatively large magnet.

 

[Kjeldsen]

They cab be seen here
OB "omni" experiment