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Old 11th February 2010, 04:53 PM   #11
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Originally Posted by sunsse View Post
In that particular design, the speaker is turned 180 degrees, compared to what i have. The front of the speaker is turning into the closed enclosure. That is what worries me.
Reverse mounting helps cool the voicecoil thru the vented pole piece! I ALWAYS build my bandpass/horn boxes this way.
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Old 14th February 2010, 10:47 PM   #12
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Originally Posted by sunsse View Post
...I need help judging whether to build ports into the front chamber or not, since i have never seen a sub cabinet like this before, and i have no idea if it makes sense or not to have a blocked front chamber.
Hopefully the designer knew what they were doing, therefore you shouldn't need to change anything.

What you are calling the "front" chamber is actually the rear chamber of a bandpass. As noted by the others, the woofer is just mounted "backwards" for cooling purposes.

The polarity of the woofer WILL matter, but compared to the satellite speakers. Some kind of measuring device or at least pink noise test track can help you see if the phase is matching the satellites in the crossover region-but that's a completely different thread.

To port the rear chamber would need a lot of analysis. You might get a little more output over a narrow range, but below that the woofer will unload just like a ported box.

Why are you asking all this? Are you unhappy with the sound or performance somehow? If you're happy with the sound, don't worry about it. If un-happy, play with the polarity and crossover settings. If you want to do that, post more system information and we'll see what we can tell you.
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