Visaton B200 - foldable Open baffle try

[gpapag]

Excellent Dave.
I've also glued triangular deflectors on the inside of the basket ribs

George

 

[steffrance]

At last, I am building a 70l cabinet with crossover .
I picked the idea on youtube because it's nicer .
you can see it here : www.youtube.com/watch?v=brlVm-LWSEc

I had a hard time today with phase plug ! I tried to do the plug wih a woodsander and it's not satisfying.

 

[steffrance]

And I got a question about the crossover . What do you think about this crossover ?

 

[Scottmoose]

It's a set of 3 different equalizing notches plus an input impedance-flattening Zobel rather than a crossover as such. Without seeing the before / after response curves in the intended cabinet / on the intended baffle though, it's difficult to say exactly how effective it will be at shaping the response to a given target -or whether you'll like the results. It can be useful to help tame a driver, but it's also possible to go OTT in this regard. Ultimately, only you can be the judge of that! As a general word of advice -be careful equalizing wideband drivers to a ~flat axial response. It can (can) work, but the power-response may suffer as the off-axis drops away, and although usually the axial response dominates, it's a good idea to keep an eye on the off-axis as far as possible as it does have an impact on what you hear, unless you're listening in a fairly close nearfield scenario with the speakers angled for axial radiation.

 

[planet10]

The swath of filters is to try to tame th erising top end (on axis) of the B200. The phase plugs fix the issue at the source of the problem, not bandaiding as with the filter.

dave

 

[Vix]

I used just a phase plug, no EQ. I have to say though that B200 was picky about amps. To me, it sounded best with Pass F2 amp, with between 10-12 ohms output impedance...

 

[steffrance]

Allright . Thanks for your answers
I think i won't put any filter yet . I will listen with phase plug . If it's not good , i will have to find a solution .
The B200 will be used with Elekit TU-8200. Hope it match well .

Dave, i followed your plans and did plugs . Shall I glue it on the bottom ?

 

[planet10]

Put a couple steel screws in the base of the plug and it will magnetically attach to the polepiece.

dave

 

[steffrance]

👍

 

[norman bates]

brave man cutting into a b200

 

[planet10]

http://p10hifi.net/tlinespeakers/FAL/B200-surgery/B200-surgery.html

dave

 

[bridger2086]

At last, I am building a 70l cabinet with crossover .
I picked the idea on youtube because it's nicer .
you can see it here : www.youtube.com/watch?v=brlVm-LWSEc

I had a hard time today with phase plug ! I tried to do the plug wih a woodsander and it's not satisfying.

Do you like the overall sound profile and bass quality in this video?

 

[steffrance]

Hi bridger
I do not really know how to answer your question .
Youtube sounds not really great . I love the shape and volume of the cabinet and I trust visaton B200 .
I will give my own impressions when speakers will be finish...

 

[steffrance]

Today i connect the speakers to my amp for a first try .
At first, it was very disappointing : sound was really bad !!!! especially bass . Worst than bas , it was uggly .
Then i plug off the phase plug and the sound becam clearer and nice. No more problem .

Do you have any clue ? Shall i surrond the plug with thread for it to connect on the edge ? (there is a
tiny space between the edge of the plug and speaker)
Can i have a problem with a little something getting in vibration?

Edit : (5 minutes later ) I plug the phase plug again and try to touch it . The sound change a lot just moving it a tiny bit. It is very sensitive !!! A quarter millimeter and the sound is muffled or gets dirty !!

Thanks for your comments

 

[steffrance]

The speakers had been finished.
I am really happy with them , it's well tuned with elekit tu 8200.