The Frugel horn for this speaker

[geminni]

Hi!
I wonder if this spekaer is any good for Horn, TQWT....
I have boght these speakers beacuse it was said that they are good for frugel horn. But, when I got them and measured the TS parameters they are not a good candidat compared with the fostex.

These are my measured TS parameters:

Qts: 0.892
Qms: 2.94
Qes: 1.281
Vas: 2.58 L
BL: 2.5 Tm
Re: 3.4 Ohm

I have made many closed, vented spekaers so now I want to try something new 🙂
I did some WinISD for vented enclosure. Both graphs are for 12 liters, same vent diameter but first one (yellow) has 8 cm long tube and second (green) has 12 cm long tube. That green one looks odd with two peaks. What does it mean?

 

[picowallspeaker]

First considerations : : looking at the driver , the basket seems to be something "lossy",
that means the cavities act themselves as an enclosure ...this goes together with speaker parameters ,so it may be unsuitable for the design proposed.
I would start with a size of 6 inches to play with rear speakers' air displacement and see what happens ...I guess it is more fun !

 

[geminni]

Does this mean that even the vented is not good for this speaker?
What to you mean with 6 inches? Tube?

I'm just doing some more experiments, so I'm testing the speaker in an empty pickled jar 🙂
It is quite nice sound, no "box" sound.

 

[Scottmoose]

Based on the incomplete specs. above, 4th order vented alignment per Keele is a whisker under 28 litres.

 

[picowallspeaker]

What to you mean with 6 inches? Tube?

sorry , I was referring to speakers' diameter , which would mean also higher Vas .
Tube also is a good thing ,actually I'm playing with tapered TL with little speakers ...