How do . .size of Isobaric Woofer enclosure for small car

[chub2]

I would like to ask you something more regarding the Isobaric enclosure size.

Is there a rough thumb rule to determine what will be the approximate size of isobaric enclosure for either a pair of 12" 8 ohms or 8" 4 ohms woofer for using in a small hatchback car? The mentioned woofers are Indian made (Milton) but there is not much technical specification from the manufacturer accept for the impedance and watts.

I am from a remote mountain called Nagaland where ordering or buying reputed international brand subwoofer is not possible. Also there is no help nearby.

Awaiting your suggestions please.

Regards

Chub2

[richie00boy]

You will have to measure the Thiele-Small parameters of the drive units then design an appropriate box. You can measure the important ones yourself with a good soundcard, amplifier, millivolt meter and a couple of resistors.