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Old 11th October 2007, 07:32 PM   #1
krokkie is offline krokkie  New Zealand
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Default Flexible pipe subwoofer

Hi all

I remember seeing a design years ago consisting of a smallish speaker and a length of flexible ducting used as a sub.

I need more info on this type of design, or using pvc pipes. How do I calculate the length?

I want to build a sub for my Pajero, but do not want to take away too much space. I am thinking of installing it under the seats, or just behind it.

Any suggestions?

Regards
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Old 12th October 2007, 03:52 AM   #2
JinMTVT is offline JinMTVT  Canada
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that brings me to think of something ..


what happens to the rear wave ( or any wave )
that would travel through some enclosure
that it would inflate with the pressure or move?
would the wave dissipate using its power ??

sorry for highjackin ur thread
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Old 15th October 2007, 12:04 AM   #3
krokkie is offline krokkie  New Zealand
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Is there a way I can maybe use a PVC pipe mounted behind the seat?

How do I workout the length of the pipe?
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Old 16th October 2007, 06:27 AM   #4
djk is offline djk
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The large diameter sub was mounted to a board in the trunk (boot), and the flexible tube went up to the narrow rear deck (package shelf).
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Old 16th October 2007, 11:14 AM   #5
OzMikeH is offline OzMikeH  Australia
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You might be thinking of a transmission line sub. It'll never fit in a Pajero. (apologies to Spanish speakers out there, no profanity intended - they really did name a car that!)

They need to be a quarter wavelength long, HUGE. they are usually close to the diameter of the driver, not sure what will happen with a thinner pipe.

Suggest 8 or 10 inch very high excursion drivers with the highest efficiency you can find in a correctly designed sealed or bass reflex box. Make the footprint the same as an Engel (I think they're called an Ingl over there ) so you can pop it in and out if your get a car fridge and secure both of them safely with one of those slider thingies. If you put a fridge in for a trip you;ll need to remove the sub for the space, two birds and all that...
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Old 18th October 2007, 06:35 PM   #6
krokkie is offline krokkie  New Zealand
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Thanks Mike

It helps a lot, I think I might just spend more time setting up the 6x9's in the back, they should provide ample bass.

I don't really want to take away any space, especially in the rear, as the Pajero is used over weekends for fishing, etc, and it's a hassle to take out a sub all the time.

Cheers

Jacques
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