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- Newsgroups: rec.audio
- Path: sparky!uunet!nwnexus!amigo
- From: amigo@halcyon.com (Scott Rowin)
- Subject: Re: Speaker vent placement question
- Message-ID: <1993Jan27.074935.1713@nwnexus.WA.COM>
- Sender: sso@nwnexus.WA.COM (System Security Officer)
- Organization: Northwest Nexus Inc. (206) 455-3505
- References: <C19v5p.IzJ@usenet.ucs.indiana.edu> <1993Jan25.181901.10010@uicc.com> <C1FIoI.L9F@ecf.toronto.edu> <1993Jan26.054811.11559@udel.edu>
- Date: Wed, 27 Jan 1993 07:49:35 GMT
- Lines: 26
-
- bower@pecan.cns.udel.edu (Ty Bower) writes:
-
- >Najeeb writes:
-
- >>I have a Paradigm 7SEII and it is ported on the rear with two small bass ports.
- >>Both ports are vents from one enclosure.
-
- >The Paradigm 11seMkII has three ports in the rear. Two are right next
- >to each other, the third one is slightly farther away and towards
- >the bottom. It almost appears that it ports into a seperate section
- >of the cabinent (there are screws between the top two and the bottom
- >one which indicate the presence of a separating piece of MDF.)
-
-
- Porting is best done at the rear, 180 degrees out of phase with the
- cone, also the port should be moved up slightly so the woofer dosen't have
- direct-firing through the port (middle or higher of the box). The reason
- for rear mounting? Front mounting could incur the infamous whisting effect
- where rear mounting can eliminate some of that since it fires away from you.
- There's been many to argue on it, but I find that if you must front-mount
- at least keep to mounting the port a decent distance from the cone so as
- to eliminat coupling that can cause distortion. The experts agree typically
- on rear-mounting ports - and the "bible" of loudspeaker design (Loudspeaker
- Cookbook) mentions rear mounting as the optimum position.
-
- --> Amigo
-