Frugel-Horn Mk3 Builds & Build Questions

[GM]

In other words, how to chose a 1 or 3 or 5 m radius?

While I assume Dave, Scott isn't interested in me speculating; something I post quite often re all manner of horn designs is that anywhere there's parallel walls it's automatically a parabolic flare.

 

[Scottmoose]

That they are.

 

[PerCarlin]

Before I close the cabinet, does this look right?
10mm felt according to the blue
3x10g acoustuff in the orange and green area.
What amount can I expect behind the baffle?

 

[planet10]

Pull it all out and tease it fully. It shound not look lumpy.

dave

 

[zintolo]

anywhere there's parallel walls it's automatically a parabolic flare.

Thanks, may I ask to make one more step explicit between the radius I was citing and the parabolic flare of the parallel sides?
I'm sorry but I've lost the linkl between the two arguments.

 

[GM]

Hmm, sorry, I'm thinking it's one of the 'secrets' of the design Dave, Scott isn't interested in me or other horn designers speculating on.

 

[PerCarlin]

My Frugel-Horn MK3 are finaly in place.
Build by 19mm MDF with oak veneer. Finished by vax-oil tinted with smoked Oak.
Deivers are TB W4-2142. The measurements are looking good, first measurement are in listening position, 2th are back close to the port. I looks like I can benefit with some deeper bas respons by adding a reflector behind the cabinets.

 

[planet10]

Pretty.

The half-wall and the stairs down will suck at least some of the bass.

dave

 

[PerCarlin]

Yepp, my intentions are to close the railing later on. And perhaps integrate reflectors.

 

[LeifB60]

I would have built them if I had a wall to put them against.
MLTL was a good solution for me and mini Onken as well.

 

[SCD]

Hello PerCarlin:
Your speakers look nice.
I think you might consider adding a powered bass driver to augment the lower frequencies. Deflectors will help, yet it is unlikely they will bring up the bass very much. The issue is small drivers can only move a limited amount of air and are therefore limited in bass reproduction.

I hope this helps

 

[planet10]

The issue is small drivers can only move a limited amount of air and are therefore limited in bass reproduction

Whilw true, with the FH the room makes an even bigger difference given the room is used the last part of the loudspeaker.

Along Scott suggestion, when you menioned deflector i thot about the ones i have with a stealth woofer hidden in it.

dave

 

[SCD]

good points Dave:
The idea of the stealth woofer is an elegant solution in an open room as PerCarlin has.

Well worth considering

 

[zintolo]

@planet10 do you have any link to those deflector / stealth woofers?
Thanks

 

[LeifB60]

How deep can FH mk3 go?

 

[Ixnay]

Not only how deep, but at what output?

 

[planet10]

@planet10 do you have any link to those deflector / stealth woofers?
Thanks

To be honest the reason i dod not mention it at first was because the woofer i used (SDX7eN) is NLA, and to do again means finding a woofer that will work in the volume/shape used.

And i have to do a proper drawing.

dave

 

[planet10]

How deep can FH mk3 go?

Heavily dependent on room, room placement, driver used, amount of damping and the amplifier used.

One can get into the 30s with everythign right, but worst case likely in the 60s.

dave

 

[planet10]

Not only how deep, but at what output?

Same parameters per-gain. Limited by the driver excursion, bass extention, and how much gain the room. room placement, amplifier provide. Typically not as much as a larger driver capable of moving more air.

dave

 

[zintolo]

Thanks @planet10 ,
will it be possible to have the speaker face down with the diffuser on small rubber feet?
This should help in placing the diffuser on the rear-wall (so the frugal horns closer to the wall as well) vs the rear faced speaker.