Bandpass Box for Pioneer Ts-W304R

[udhay_cit]

This is my first box design. I have a pioneer TS-W304R sub woofer. I'm looking for a Bandpass Box.
Initially I started with "AJ Bandpass Designer" software. Port location is not mentioned in the software. Is it important to place port at a specific location?

Please give me your feedback before I start my construction. Any suggestions are welcome.


Regards
Udhay

 

[udhay_cit]

The dimension of the drawings are from the software. The port dimension can't be fit into the front portion of the box. How to solve the problem. Is it the output of the software correct?

 

[freddi]

you could use a right angle slot port but it could be difficult to adjust plus you'd have to compensate for the port's volume. A 10cm diameter port with flared ends to reduce turbulence and compression might be enough - sub builders should know. It should be ok to have the port at a right angle to the driver. The port could project out of the enclosure.

 

[TBTL]

The dimensions of the box don't matter, as long as the volumes of the chambers are correct. Placing the port with the opening near a boundary increases it's effective length.

This website might be relevant for you: The Subwoofer DIY Page

 

[GM]

Yikes! This driver wants to 'feel' a ~1070.4 L/78.9 L BP4 tuned ~28.4 Hz, so any higher tuning will be somewhat under-damped just as your sim indicates.

FWIW, the filter [front] chamber is normally ½ the compression [rear] chamber in a BP4 alignment, so rounding yours to 74 L/37 L calculates a 40 Hz Fb. Don't know why your slightly different alignment is off so much at 50 Hz.

Efficiency is quite low at ~84 dB, so with a low 4.7 mm Xmax, power is limited to ~20 W max down low and ~100 W from 32 Hz-up, so in theory you can get by with a shorter 10.2 cm diameter vent.

GM