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Old 1st November 2006, 03:15 AM   #1
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Default Port front or back??

Where to put Port front or back? Does it make a difference??
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Old 7th November 2006, 08:07 PM   #2
Svante is offline Svante  Sweden
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On the back: Port noise will be less audible. On the other hand, one meust make sure that the speaker is not placed too close to the back wall, or in a bookshelf. For commercial products, the designer rarely knows how the end consumer will place the speaker, so it might be safer to put the port on the front. For DIY speakers, the back side is better IMO.

There also is a slight difference in the response due to the longer pathway from the back, but that difference is usually very small, and it is impossible to say which is better without looking into the details of the given design.
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Old 7th November 2006, 08:51 PM   #3
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Thank you Svante,

Since my original Question, I have nearly finished my speakers. A 3 way truncated Pyramid design, and I have placed the Port on the back, I think I did the right thing.
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Old 7th November 2006, 09:44 PM   #4
AKN is online now AKN  Sweden
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Build a test box and compare....
I prefer front port as I want all sound radiate in one direction and have woofer and port sum close. Low freq is ominidirectional but speakers nevertheless tend to be more dependant of placement to back wall if back ported.
Regarding the drawbacks of front port Svante is right on.
/ Anders
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Old 8th November 2006, 10:59 AM   #5
rabbitz is offline rabbitz  Australia
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Another benefit with the port on the back is the mids leaking out the port are in the shadow of the box so less will be heard.
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