Which 12'' to mate with the ATC dome in a passive system?

[Lojzek]

I don't think so. I found these rounds and chamfers are acoustically not very relevant. "

I have made a weighted average baffle step response of a 28 mm dome tweeter using Response Modeler. In total there is 25 response simulated measurements at following angles and conditions.

On-Axis: 0 deg
Right: 5,10,15,20,25,30 deg
Left: 5,10,15,20,25,30 deg
Up and right: 0505, 1010, 1515, 1520, 1525, 1530 deg
Up and left: 0505, 1010, 1515, 1520, 1525, 1530 deg

 

[Eldam]

May I : http://www.toutlehautparleur.com/media/catalog/product/datasheet/audax/PR240Z0-8.pdf

10" !

but if 12" or even 15" is not a problem in the design : Monacor Haut-parleur Monacor SP-38/300PA, 8 ohm, 38 cm

big VAS, not too much high XMax... very low distorsion (not in relation with the price, even better than B&C) : not known by the american markett 😛 !

But : is there not a big too huge gap in size between the ATC and the driver below ????

8" maxi ? http://www.toutlehautparleur.com/media/catalog/product/datasheet/audax/HM210Z12-8.pdf !

PS : Aerogel is a high End "Papyrus material" made at home... !

 

[mbrennwa]

I have made a weighted average baffle step response of a 28 mm dome tweeter using Response Modeler. In total there is 25 response simulated measurements at following angles and conditions.

On-Axis: 0 deg
Right: 5,10,15,20,25,30 deg
Left: 5,10,15,20,25,30 deg
Up and right: 0505, 1010, 1515, 1520, 1525, 1530 deg
Up and left: 0505, 1010, 1515, 1520, 1525, 1530 deg

You modelled the baffle diffraction at different angles. I was referring to the chamfers / rounded edges at the baffle edges. Two totally different things!

The baffle dimensions (width, height) are mostly similar to the acoustic wave lengths, so they are relevant to the acoustics of the loudspeaker, and their effect depends on the angle (as shown in your model calculations).

The dimensions of the chamfers / rounded baffle edges are usually much smaller than the acoustic wave lengths involved in audio. They therefore hardly affect the acoustics of the loudspeaker and may be relevant at very high frequencies only (at 10kHz the wave length is 3.4cm).

But we're getting off-topic. I suggest we stop here (or you may open a new thread).