1. ## Need help with a 4th order bandpass box

First attempt at a Bandpass Box.

I just built a 4th order BP box for a Panasonic 10" woofer, and it sounds terrible. Not "bandpass" bad, just designed wrong. The frequency response is WAY off.

Here is what I have:

Panasonic 10" t/s
Vas: 42 L
Fs: 30.0 Hz
Qts: 0.37

I input that into the calculator on carstereo.com and came up with:

Volume front = .397 ft^3

Volume rear = .533 ft^3

Fb (front side) = 58.3 Hz

Frequency response ~ 35-90 Hz

Added sub displacement and port displacement to the front and rear volumes and built the box.

Due to the small area, I could only get a 3" port into the enclosure. Maybe that is too small? Calculated a 3" x 12" long port.

Anybody tell me what to do different?????

Thanks!
Brian

2. ## Re: Need help with a 4th order bandpass box

Originally Posted by Brian Owens
First attempt at a Bandpass Box.

I just built a 4th order BP box for a Panasonic 10" woofer, and it sounds terrible. Not "bandpass" bad, just designed wrong. The frequency response is WAY off.

Here is what I have:

Panasonic 10" t/s
Vas: 42 L
Fs: 30.0 Hz
Qts: 0.37

I input that into the calculator on carstereo.com and came up with:

Volume front = .397 ft^3

Volume rear = .533 ft^3

Fb (front side) = 58.3 Hz

Frequency response ~ 35-90 Hz

Added sub displacement and port displacement to the front and rear volumes and built the box.

Due to the small area, I could only get a 3" port into the enclosure. Maybe that is too small? Calculated a 3" x 12" long port.

Anybody tell me what to do different?????

Thanks!
Brian
try posting in the right section for 1. there is an enclosure section

3. ## Re: Need help with a 4th order bandpass box

Hook up with 80 He will get you in the right direction.

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