DAYTON QT385-4 15" QUATRO SERIES SUBWOOFER *PIC*

[zinger084]

Provided Link: DAYTON QT385-4 15" QUATRO SERIES SUBWOOFER


Does anyone have the exact calculation of the volume displacement of:

DAYTON QT385-4 15" QUATRO SERIES SUBWOOFER

?

I usually calculate them myself, bbut since i do not have the sub in hand yet, this is not feesible.

Thanks,

Jared

[robertcozine]

> Does anyone have the exact calculation of
> the volume displacement of:

> DAYTON QT385-4 15" QUATRO SERIES
> SUBWOOFER

> ?

> I usually calculate them myself, bbut since
> i do not have the sub in hand yet, this is
> not feesible.

> Thanks,

> Jared

.814 liters. It's on the spec sheet.

[brianwalter]

Jared, are you looking for the volume of air the cone displaces as it travels in and out, swept volume (Vd), or the volume of air the the driver takes up when put into the box? These are two different things, and the value that Robert gave you is the swept volume, Vd.

[zinger084]

I am looking for the volume displacement of the speaker itself. I do not want Sd or Vd values; these are not the displacement of the driver itself.

I need the volume take up by the driver itself (i.e., magnet volume, cone volume, and minimal basket volume.)

[mike_e]

> I am looking for the volume displacement of
> the speaker itself. I do not want Sd or Vd
> values; these are not the displacement of
> the driver itself.

> I need the volume take up by the driver
> itself (i.e., magnet volume, cone volume,
> and minimal basket volume.)
to caculate it you dont really need the driver.... here:
cutout Dia. =13.875in
mounting depth =6.625
now do this:
13.875x6.625=91.92 cu.in.
then do this
91.92x.01639= 1.5229 liters
or
91.92/1728= .05319 cu.ft.

[zinger084]

There is no way that is near a good estimate.

Does anyone have the exact volume take up by this driver?

> to caculate it you dont really need the
> driver.... here:
> cutout Dia. =13.875in
> mounting depth =6.625
> now do this:
> 13.875x6.625=91.92 cu.in.
> then do this
> 91.92x.01639= 1.5229 liters
> or
> 91.92/1728= .05319 cu.ft.

[markroberts]

Provided Link: Tempest white paper


> There is no way that is near a good
> estimate.

> Does anyone have the exact volume take up by
> this driver?
I used the volume of the adire tempest which is also a 15" sub with a stamped steel frame. It was listed as 5 liters displacement. Or .18 cu.ft.
I know not exactly same but I figured it was close enough. Here is a link.

[bogie]

A tenth of a cube or so ain't gonna make a bit of difference.

[shawn_a]

> A tenth of a cube or so ain't gonna make a
> bit of difference.

Just call it .08 ft^3 and be done with it. I usually just stab at it and for a 15" like the Quatro, I'd go with this. It's not worth the headache as the effect is minimal. We're talking a difference of less than 1 Hz at F3 with the Quatro. Not worth going crazy about.

shawn

[unknownuser]

> .814 liters. It's on the spec sheet.

" Vd = Volume Displacement, how much air the driver can move in its linear range. "

Well let's see, we've got 3 guesses - any one else want to have a go at it?

.814 liters
1.5229 liters
5 liters

I think Jared is looking for:

" Dvol = Driver displacement volume. Approx. the box volume occupied by the driver, when mounted with magnet pointing into the box. "


(Originally posted by: Scratchy)

[mike_e]

> " Vd = Volume Displacement, how much
> air the driver can move in its linear range.
> "

> Well let's see, we've got 3 guesses - any
> one else want to have a go at it?

> .814 liters
> 1.5229 liters
> 5 liters

> I think Jared is looking for:

> " Dvol = Driver displacement volume.
> Approx. the box volume occupied by the
> driver, when mounted with magnet pointing
> into the box. "

and i did based on pe specs for cutout and mounting depth... this is not the VD of the driver but actual space taken up by the driver.. after using pe's specs for the rs125 and doing the best measuring i could with the speakers i got i was not off by much. Sorry i dont have the number but it was less then 1%.