Bass for my soldier

[Nathenry]

Forget to post this picture



polyfill stuffing in the box

 

[tb46]

Hi Nathenry,

Post #321: "...stuffing..."

That's a start, as discussed before, this is something to play around with.

By the way, the upper horn/driver do not have to be mounted inside the Beta-12A-2 horn, they can be in their own enclosure,which would give you more freedom of placement, and maybe make the building of the mid-horn easier.

Regards,

 

[Nathenry]

Hi Nathenry,

Post #321: "...stuffing..."

That's a start, as discussed before, this is something to play around with.


Regards,

Oliver
How would we know if the box is stuff the right way, is there something we should listen for.

 

[Nathenry]

Hi Nathenry

By the way, the upper horn/driver do not have to be mounted inside the Beta-12A-2 horn, they can be in their own enclosure,which would give you more freedom of placement, and maybe make the building of the mid-horn easier.

Regards,

This is a good idea Oliver. Thanks

But what would need to be change and the beta-12a horn drawing if the upperhorn/driver is in their own enclosure.

 

[tb46]

Hi Nathenry,

"...what would need to be change and the beta-12a horn drawing if the upperhorn/driver is in their own enclosure."

Nothing really, you would keep the mid-horn just as epa designed it, and you would not have to worry about providing cut-outs for the upper horn. Might make it a little easier, and speed things up.

Regards,

 

[Nathenry]

Epa how close to the speaker must phase plug be place and where on this drawing the horn driver must be place.

 

[epa]

the white arrows show the position of the hf horn.
the yellow arrows point to the phase plug (center extension)
have you seen the print out post 303?

 

[Nathenry]

the white arrows show the position of the hf horn.
the yellow arrows point to the phase plug (center extension)
have you seen the print out post 303?

Yes i saw post 303 and print it out. what i meant to ask is if the phaseplug should be touching the beta12a speaker.

 

[epa]

you need 1/4 clearence to allow for excursion.

 

[Nathenry]

you need 1/4 clearence to allow for excursion.

Thanks

 

[Nathenry]

center pole piece eg "phaseplug" whe make of 2 pieces of 18mm(3/4)ply glueéd on top of each other and then to the center cross.
here is a printout scale 1:1 so you can put that on top of the wood and cut it with a jigsaw.

Epa Can I Get the phase plug in pdf or just draw the measurements on the phaseplug

Thanks

 

[Nathenry]

midhorn pictures











More pictures later.

 

[epa]

that looks great.good work
i cant see if the front of the horn is flush to the outside or not.
i had an ofset so you could mount a grill
doesnt make a difference in practice.

here is the pdf
the "phase plug" has the same maesurements as the centerpole piece.

 

[Nathenry]

Epa what should be the exact measurements for the speaker chamber. Right now it measure 20 5/8"x 22 5/8"

 

[epa]

making progress.😀

if you would make it 13*13 inch,and the same depth,it wil be between 10 and 15 ltr wich is perfect.
some lining against the walls of the rear chamber.

1 thing ,make sure to double check the distance between the "phaseplug"and the speaker.
i see the cross is about 3/8 back from the front,this means it sticks out 3/8 cm more then it should on the back..
this is not a problem as long as you double check that the cone has the clearance needed.
1/4" is ok.

 

[tb46]

Hi Nathenry,

eap, Post #335: "...double check that the cone has the clearance needed."

You can alway twiddle away at the extensions of the cross on the plug. A minimum of 1/4" is important, that's only ~6mm.

In the rear chamber you can always take up volume by lining the chamber with styrofoam, e.g.: from old packing material, or Home Depot. You could start with a few layers of closed cell foam (styrofoam), and then add a layer of open cell foam and fiberfill.

Regards,

 

[Nathenry]

making progress.😀

if you would make it 13*13 inch,and the same depth,it wil be between 10 and 15 ltr wich is perfect.
some lining against the walls of the rear chamber.

1 thing ,make sure to double check the distance between the "phaseplug"and the speaker.
i see the cross is about 3/8 back from the front,this means it sticks out 3/8 cm more then it should on the back..
this is not a problem as long as you double check that the cone has the clearance needed.
1/4" is ok.

Hi Nathenry,

eap, Post #335: "...double check that the cone has the clearance needed."

You can alway twiddle away at the extensions of the cross on the plug. A minimum of 1/4" is important, that's only ~6mm.

In the rear chamber you can always take up volume by lining the chamber with styrofoam, e.g.: from old packing material, or Home Depot. You could start with a few layers of closed cell foam (styrofoam), and then add a layer of open cell foam and fiberfill.

Regards,

I will pass on the information.
Thanks Epa and Oliver

 

[Nathenry]

Hi Nathenry,

eap, Post #335: "...double check that the cone has the clearance needed."

You can alway twiddle away at the extensions of the cross on the plug. A minimum of 1/4" is important, that's only ~6mm.

In the rear chamber you can always take up volume by lining the chamber with styrofoam, e.g.: from old packing material, or Home Depot. You could start with a few layers of closed cell foam (styrofoam), and then add a layer of open cell foam and fiberfill.

Regards,

EPa or Oliver, can we use styrofoam to make the phaseplug.

 

[Nathenry]

ultra drive dcx2496 setup

Epa or anyone, plase post some tips on how to operator the dcx2496

We are running out of time.

 

[tb46]

Hi Nathenry,

Post #338: "...can we use styrofoam to make the phaseplug."

I have not seen styrofoam used to take up extra room in the front (throat chamber) of a driver. I would suggest to stay with wood, as per epa's initial suggestion.

Maybe PM epa as to the DCX2496 setup.

I'm amazed how much you have gotten done in a very short time.

Regards,