[[email protected]]

Hello,

Just had a new study added onto my home and took the opportunity to
wire for some home cinema.
I'm struggling to find a sensible place to place a subwoofer and so
wondered whether I could build my own into a step into the room?

I've got a step-down into the room that's a convenient wooden box of
around 80cm x 80cm x 20cm (wdh). Does this sound like a suitable
candidate for conversion into a subwoofer? If so - any suggestions on
how I should begin? (my existing rather puny woofer is an active unit
which would pretty much fit on it's side inside the step) - but I'm
guessing I could do something better than this?

Cheers,

Mark

[Arny Krueger]

wrote in message

Hello,

Just had a new study added onto my home and took the
opportunity to wire for some home cinema.
I'm struggling to find a sensible place to place a
subwoofer and so wondered whether I could build my own
into a step into the room?

I've got a step-down into the room that's a convenient
wooden box of around 80cm x 80cm x 20cm (wdh). Does this
sound like a suitable candidate for conversion into a
subwoofer? If so - any suggestions on how I should begin?
(my existing rather puny woofer is an active unit which
would pretty much fit on it's side inside the step) - but
I'm guessing I could do something better than this?

I have a number of friends who have built subwoofers into their houses.

Some used closets for the enclosed volume, others used their basements.

Your biggest design challenge may be figuring out how to keep debris from
dropping onto the woofer cone and rattling. ;-)

[GregS[_3_]]

In article , wrote:
Hello,

Just had a new study added onto my home and took the opportunity to
wire for some home cinema.
I'm struggling to find a sensible place to place a subwoofer and so
wondered whether I could build my own into a step into the room?

I've got a step-down into the room that's a convenient wooden box of
around 80cm x 80cm x 20cm (wdh). Does this sound like a suitable
candidate for conversion into a subwoofer? If so - any suggestions on
how I should begin? (my existing rather puny woofer is an active unit
which would pretty much fit on it's side inside the step) - but I'm
guessing I could do something better than this?

Cheers,

Mark


You have about 4 cu ft. The box may need reinforement so all sides
are secure from vibration. I guess a max 10 inch woofer could be used or two of
them. You can use smaller ones but 10 is going to be the best bet.
For a closed box, as an example find a woofer with a box requirment of slightly
less than 2 cu ft. and use two of them. If you got a car audio 2 ohm woofer,
then you could series them for 4 ohms. You could get a plate amp from Parts
Express for the amplification.

greg

[[email protected]]

On 6 Aug, 13:50, "Arny Krueger" wrote:
wrote in message


I have a number of friends who have built subwoofers into their houses.

Some used closets for the enclosed volume, others used their basements.

Your biggest design challenge may be figuring out how to keep debris from
dropping onto the woofer cone and rattling. ;-)

Are there any guidlines for placement of the driver it's-self? Should
it be entirely enclosed within the casing with just an external port,
or should the driver face out the cabinet with separate holes drilled
acting as a port?

Any guidance very much appreciated..

Cheers,

Mark

[GregS[_3_]]

In article , (GregS) wrote:
In article ,
wrote:
Hello,

Just had a new study added onto my home and took the opportunity to
wire for some home cinema.
I'm struggling to find a sensible place to place a subwoofer and so
wondered whether I could build my own into a step into the room?

I've got a step-down into the room that's a convenient wooden box of
around 80cm x 80cm x 20cm (wdh). Does this sound like a suitable
candidate for conversion into a subwoofer? If so - any suggestions on
how I should begin? (my existing rather puny woofer is an active unit
which would pretty much fit on it's side inside the step) - but I'm
guessing I could do something better than this?

Cheers,

Mark


You have about 4 cu ft. The box may need reinforement so all sides
are secure from vibration. I guess a max 10 inch woofer could be used or two of
them. You can use smaller ones but 10 is going to be the best bet.
For a closed box, as an example find a woofer with a box requirment of slightly
less than 2 cu ft. and use two of them. If you got a car audio 2 ohm woofer,
then you could series them for 4 ohms. You could get a plate amp from Parts
Express for the amplification.

I say closed box just for simplicity. The woofer type determines whether
it will work in a closed box. Most car audio drivers are for ported box.
The box will need rubber feet else it needs glued to the floor so it does not walk.
On a rug may be sufficient.

greg

[Arny Krueger]

wrote in message

On 6 Aug, 13:50, "Arny Krueger" wrote:
wrote in message


I have a number of friends who have built subwoofers
into their houses.

Some used closets for the enclosed volume, others used
their basements.

Your biggest design challenge may be figuring out how to
keep debris from dropping onto the woofer cone and
rattling. ;-)

Are there any guidelines for placement of the driver
it's-self? Should it be entirely enclosed within the
casing with just an external port,

The port if any, and the front of the speaker should vent into the room.

Any guidance very much appreciated..

You're just building a subwoofer enclosure, pretty much like any other.

Check out any of the many sites devoted to do-it-yourself subwoofers, for
example:

http://www.soundandvisionmag.com/fea...subwoofer.html

http://www.diysubwoofers.org/

http://www.io.com/~patman/shivasub.html

http://www.scrounge.org/speak/subwoof.htm

etc.

Someone pointed out that your enclosure is about 4 cubic feet. I've built
12" subwoofers into boxes that size, with good results. One key is getting
a subwoofer driver with the volume displacement required for the bass
extension you desire, and another is matching the box to the subwoofer
driver.

[GregS[_3_]]

In article , wrote:
On 6 Aug, 13:50, "Arny Krueger" wrote:
wrote in message


I have a number of friends who have built subwoofers into their houses.

Some used closets for the enclosed volume, others used their basements.

Your biggest design challenge may be figuring out how to keep debris from
dropping onto the woofer cone and rattling. ;-)

Are there any guidlines for placement of the driver it's-self? Should
it be entirely enclosed within the casing with just an external port,
or should the driver face out the cabinet with separate holes drilled
acting as a port?

Any guidance very much appreciated..

Cheers,

Mark


I was just looking up woofers. Its seems difficult to distinguish beween car audio
and regular HiFi. Car audio deals with small spaces and the wooders are designed
for small spaces. Even though you have enough space, and the selection is huge,
why not go down to some store like Best Buy and ask for drivers for the space intended.
You can start discovering speaker building and get into it as far as you want.
For a quick start go to the stores. I'm thinking two 10 inch dual coil 2/4 ohm.
Get a closed box woofer(s). Keep the box well sealed and the drivers mounted
and sealed.

greg

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