B200 + DHT9

[Biarritz]

Hi,

Sorry for not writing in German, I would just make to many mistakes if I did.

I wanted to show my latest modifications to my speakers.
I have a pair of aperiodic enclosures containing a B200 combined with a DHT9. These ara old tweeters I know, but the TL 16H is just too expensive for me and I had them laying around anyway.





I created a crossover using BoxSim resulting in the following diagrams:





The beaming of the B200 is almost eliminated and the DHT9 bring more brightness to the sound which makes the overall image very wide.
I also use a 10 inch sealed sub to support the lower frequencies.

Feel free to comment on my creation in German.


Kind regards,


Patrick

[walwal]

Unfortunatly Boxsim does not work with the B 200, due no piston-like movement.

Der B 200 lässt sich leider nicht mit Boxsim simulieren, da die Membran nicht kolbenartig arbeitet.

[walsc]

Du hast es gewagt den heiligen B200 für zwei Wege zu missbrauchen, herzliche Gratulation!
Mir ist vor zwei Jahren etwas Ähnliches im Kopf herumgegeistert, habe aber dann die Finger davon gelassen - zu viel finanzieller Aufwand für ein Experiment mit unsicherem Ausgang.

Eine genauere Klangbeschreibung wäre nett.

Kommt denn der kleine Subwoofer noch mit bei größeren Pegeln?

[LeePriest]

Für das DHT9 existieren leider keine Daten. Ich habe zu Hause noch 3 Stück liegen und würde die auch gern mal simulieren als 2-Wege. Wirkungsgrad-bezogen dürfte B200 und DHT aber funktionieren, war ja auch in der Fiesta 30 mit dem BG20.

[Biarritz]

About a year ago I had my speakers (containing only the B200) professionally measured in a deadroom (sorry the images are very big)





The response curve shows 3 measurements:

The top curve is measured without any correction circuit
The middle is with 1mH and 8 Ohm correction in parallel
The bottom curve is with correction but under a 20 degree angle

When applying correction circuit in BoxSim the curves looked very simular to the actual measurements.

I know that using the B200 in a two way setup is a sin, but I was unsatisfied with it. I have tried different correction circuits, but that never did the trick.
Then I saw the new plans with Solo 20 and 5 with a TL16 H super tweeter. Since the DHT9 is 'almost' simular to the TL16H I wanted to give it a try.

If all works out ok I want to remove the large faceplate of the DHT9 and mount it as close to the B200 as possible.


@Walsc
It is very diffecult to describe the how it sounds. The DHT9 is a bit dominant at the moment, but to me it sounds ok. There is more air to the sound. The small sub is doing fine. I have a very small listening room, but I'm thinking of adding a second one to my system.

@LeePriest:
The data for the DHT9 is available for BoxSim. You will have to search for the archive for old Visaton speakers. I do not know how accurate it is though.

I hope somebody else would also feel the urge to try this modification. I'm also very interested to know if somebody tried the TL16 H with their Solo 20 or 50.

[Quaschdl]

Why didn't you reduce the peak between 1 and 2kHz? Probably it makes a typical "fullrangespeakersound", with very nice voice reproduction. But does it not become annoying if you are listening for a longer time?

[Biarritz]

@Quaschdl
I already have a new version of the correction circuit to reduce this peak.
But I ran out of components. I will only have time to visit the store next week.

It does get annoying after listening for a longer time, so will definitely try this very soon.