oris 200 back chamber stuffing

Hi,

While assembling the Oris 200 horn, here're some questions wonder if anyone can help:-)

1. do we need to stuff anything in the back chamber?

2. there's a wood cover at the back of the back chamber; does it align to the edge at the back, or it goes straight in until it hits the stuffing material?

3. there's a hole at the wood cover; I presume that's supposed to be closed and open just to make it easier to take the cover out, right?

4. can we paint the wood cover too?

thks
Francis

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Hi Francis,

1. do we need to stuff anything in the back chamber?

You could try to add some damping material to try to see if that sounds better in your situation and leave the wooden cover out of the back chamber to reduce the stronger low-mids with the Fostex FE206E.

2. there's a wood cover at the back of the back chamber; does it align to
the edge at the back, or it goes straight in until it hits the stuffing
material?

Aligned with the back end.

3. there's a hole at the wood cover; I presume that's supposed to be
closed and open just to make it easier to take the cover out, right?

It does help to take it out more easy but the purpose is to release pressure from the chamber.

4. can we paint the wood cover too?

If you like then yes but not the edge (it won't fit in the chamber when that is painted) .

Ciao,

Bert

thks
Francis

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Hi Bert,

1. is the rubber strip put at the edge of the PVC back chamber as a cushion for the horn to sit when it's bond to the ring?

2. using the glue alone, is it enough to hold the horn for a long time? I mean, would the screw goes all the way through to the horn too to hold it here when we drill in onto the ring?

3. after we push the ring in to the back chamber and before we apply the glue to glue the horn, you said to add "silicon sealant". Is that to add around the ring touching the PVC back chamber? If yes, then which side, the side facing the wood (back), or the side facing the horn? Or both? Is it for securing the position of the ring, or for air sealing?

4. I see in the photo on the instruction manual that you have some sort of foam/rubber strip directly on the inside alignment of the ring, seems to be for driver to sit on it; is that extra? Should I put something like that before I fix my driver on?

5. I might need to drill holes on the back chamber to attach a mount there to mount the back chamber to the base box; is it ok to drill into the back chamber? What kind of precautions I should take?

Thks
Francis

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Hi Francis,

1. is the rubber strip put at the edge of the PVC back chamber as a
cushion for the horn to sit when it's bond to the ring?

The rubber strip is supposed to be pressed in between the horn wall and the edge of the back chamber.

2. using the glue alone, is it enough to hold the horn for a long time? I
mean, would the screw goes all the way through to the horn too to hold it
here when we drill in onto the ring?

Yes, the glue is strong enough to hold the horn. Please do not drill all the way through!

3. after we push the ring in to the back chamber and before we apply the
glue to glue the horn, you said to add "silicon sealant". Is that to add
around the ring touching the PVC back chamber? If yes, then which side,
the side facing the wood (back), or the side facing the horn? Or both? Is
it for securing the position of the ring, or for air sealing?

The silicone should be in between the mounting ring and the PVC back chamber. This to secure the position of the ring before drilling and using the screws to secure this permanently.

4. I see in the photo on the instruction manual that you have some sort of
foam/rubber strip directly on the inside alignment of the ring, seems to be
for driver to sit on it; is that extra? Should I put something like that
before I fix my driver on?

That foam is of no use for AER or Lowther drive units, I should make a new pictures....

5. I might need to drill holes on the back chamber to attach a mount there
to mount the back chamber to the base box; is it ok to drill into the back
chamber? What kind of precautions I should take?

Yes, you can drill as many holes you like as long as you have them closed again with the screws to mount it to a stand or your bass box. Have the woolfelt removed when drilling though..

Ciao,

Bert

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Hi Bert

thks

The silicone should be in between the mounting ring and the PVC back
chamber. This to secure the position of the ring before drilling and using
the screws to secure this permanently.

Since the ring fits so well to the wall of the PVC, after we put the ring in, we can no longer apply sealant between the ring and the wall of the back chamber. So should we apply the sealant to the ring's wall first and then slide it down the PVC back chamber?

Francis

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Hi Francis,

Since the ring fits so well to the wall of the PVC, after we put the ring
in, we can no longer apply sealant between the ring and the wall of the
back chamber. So should we apply the sealant to the ring's wall first and
then slide it down the PVC back chamber?

There is not much space indeed. I usually add silicone to the back chamber wall (in a circle around the spot with the pre-drilled holes) and "wiggle" and "turn" the ring so that the silicone is more spread out.

Bert

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Hi Bert

That foam is of no use for AER or Lowther drive units, I should make a new
pictures....

Maybe you should make a video of yourself assembling a pair of horns that you can then send out on tape/dvd. As they say, a picture is worth a thousand words........

Russell

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Hi Russell,

Maybe you should make a video of yourself assembling a pair of horns that
you can then send out on tape/dvd. As they say, a picture is worth a
thousand words........

I was thinking about that and create some short scene's to explain more and put those on-line.

Ciao,

Bert

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Good idea too.

Hi Russell,

Maybe you should make a video of yourself assembling a pair of horns

that

you can then send out on tape/dvd. As they say, a picture is worth a
thousand words........

I was thinking about that and create some short scene's to explain more
and put those on-line.

Ciao,

Bert

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oris 200 back chamber stuffing (BD-Design)