Waveguides and horns

[phusis]

After one year of work my Universe is ready

Looks great

 

[rajacat]

Very, very, very nice.

 

[noah katz]

Yes, a work of art!

What type of design is the Sorcerer's Apprentice cap woofer section?

 

[jzagaja]

Beyma Power 15 in a closed box (5.5 cu. ft.)

 

[phusis]

Beyma Power 15 in a closed box (5.5 cu. ft.)

What is the x-over point to the BMS coaxial comp. driver? A down firing woofer, I imagine, could result in problems with the lower mids when crossed too high, but am guessing it represents no issue in your case.

Nice to see a closed box configuration.

EDIT: with regard to sonics only, I'd recommend you may try removing the banana plugs from the wires to the BMS unit. Maybe it makes no difference, maybe you've tried already

 

[jzagaja]

Crossover points (acoustical) roughly 350Hz, 6500Hz.

 

[phusis]

Thanks.

Rare, outside this type of drivers, to see one driver/diaphragm covering the very important frequency range from 350-6.5kHz, and then there's the high sensitivity to boot as well.

 

[noah katz]

I just noticed something - why does the 12BR100 have much higher distortion at 4 kHz with 80m dB output compared than with 100 dB output?

12BR100 vs. 12BR70 (old data).

 

[jzagaja]

Looks like an artifact. It's old data. Zaph should have more recent.

 

[djn]

Very nice J.

 

[jzagaja]

A friend woodwork (Iwata-300), 12BR70.

 

[phusis]

Nice design and woodwork.

Do you know what drivers are mounted on the Iwata-300's?

 

[jzagaja]

Beyma CP750/Ti

 

[djn]

Beautiful woodwork.

 

[jzagaja]

This is Palisander Rio. Because of limited time shape is kept simple but in future who knows.

 

[phusis]

Beautiful wood finish.

That's one mean looking horn/driver combo. Have you heard any of them(horn and/or driver), jzagaja, in whatever combination - and if so, some impressions?

 

[jzagaja]

CP750/Ti on Iwata is IMHO too sharp. Large titanium diaphragms ring too much - should be damped for home use.

 

[phusis]

That's what I feared.

The BMS 4590 coaxial driver would likely make a good combo with the Iwata horn, I presume?

 

[ra7]

Does anyone have any polar plots of the BMS4590/92? Reaching flat to 20 kHz on axis is one thing, doing so with good power response is another.

Edit: I meant the polar response on big horns like Iwata 300 or Tractrix 450 that can play low.

 

[jzagaja]

True no magic here. Opinion from Radian users are welcome. Next week I will be measuring JMLC-200T + Radian 950 with Truextent.