Bassreflex with JBL 2226h??

First sorry, My english Are really bad. :crying:
I have a 120 liters cabinet to my 15" JBL 2226h bass speaker, and going to make the cabinet a bassreflex cabinet, because the deep bass was really bad.
What port size may i use? 1 or 2 ports? Please help :confused:
spec for the speaker:

Hz: 30-2500
fs: 40 Hz
Re: 5.0 ohms (H)
Qts: 0.31
ms: 5.0
Qes: 0.33
Vas: 175 l
Sd: 0.088 m2
Vd: 689 cm3
Le: 1.75 mH (H)

Half space 2: 3.3%
Pe (Max)1
Overall Diameter: 388 mm (15¹⁷⁄₆₄ in)
Bolt Circle Diameter: 370 mm (14⁹⁄₁₆ in)
: 137 mm (5½ in)
Volume Displaced by Driver: 6 l

Hei Morten

Pictures of the cabinet? Inner dimensions of the box? Speaker placement?

Rebuilding a pair of srx. I started with a -6 dB bass shelf in win-isd. Then modelled in hornresp. It works because the box is tall.

Mårten

Here you have 2 tuning suggestions, both with a 10 cm port, tuned to 52 Hz and 40 Hz, respectively. In the first case with a 2 cm deep port (which, in effect, is a hole in the front baffle), in the second case with a 5 cm deep port.

Quote:

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Originally Posted by Jan Daugaard

Here you have 2 tuning suggestions, both with a 10 cm port, tuned to 52 Hz and 40 Hz, respectively. In the first case with a 2 cm deep port (in effect no port -- the front baffle is about 2 cm thick), in the second case with a 5 cm deep port.

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In the case of 2226H driver usage , cone displacement can be limitation parameter if not hi-pass filter applied ( say under 30Hz). I think that 2226H is not the best solution for LF driver (without horn-loading)

Regards
Ivica

You won't go deep with a 2226 as it is a midbass driver, not a subwoofer. Tune the cabinet to 40Hz and give a 6db boost from 80 Hz downward. High pass at 30Hz is a good idea as there's no reason to waste power on that bottom octave that will never happen.

Thank you every body for the help, im new with this bass speaker so tanks for all the helpfull information. I think i'm going to use a 4" port on 5 cm :)
Again sorry about my bad english :)

A single port of 4" diameter x 2" length will tune a 120l enclosure to 40 Hz - http://www.psp-inc.com/tools.html

Check this, enclosure 6 for the 2226: http://www.jblpro.com/pub/manuals/enclgde.pdf