AudioRoundTable.com - RDF feed
type: channel
description: Audio advice and discussions with audiophiles and professionals. Free discussion forums, open to all and frequented by industry experts. Ask questions and get advice on stereos, speakers, hi-end amplifiers, pre-amps, home theater, tube hi-fi, turntables, vinyl, tweaks, music, films, video, DVDs and more.
items: Port - front or back
items: Re: Port - front or back

Port - front or back
type: item
description: What are the tradeoffs between locating the port on the front or back of a bass reflex cabinet. The project continues - picked up a pair of JBL 2446J compression drivers with 2385A flare. The flares are significantly bigger than the ones being replaced so that I have to do some significant rework of the front baffle to accomodate them. The speaker cabinets are 4 Pi Towers with two four inch diameter (length 3.5 in) rear ports. Since I am redoing the baffles, I could easily locate the ports to the front. My woofers are Eminence Delta Pro 15in in a 6.5 in cubic enclosure. In the corner behind the speakers are bass traps. Would relocating the ports to the front improve the bass? Thanks Hakn
creator: jshoc
date: 2006-02-22T23:43:10-00:00

Re: Port - front or back
type: item
description: No one can answer that. It depends on room placement, what the opther drivers are doing in terms of phase, etc. The best way is trial & error. Get a port plug, and make two ports, and then seal one. -akhilesh
creator: akhilesh
date: 2006-02-23T13:23:59-00:00

Re: Port - front or back
type: item
description: As long as a port isn't blocked, it makes no difference, front or rear. It forms a Helmholtz resonator and the frequencies of interest have very long wavelengths, completely omnidirectional.
creator: Wayne Parham
date: 2006-02-23T14:36:02-00:00

Re: Port - front or back
type: item
description: As long as a port isn't blocked, it makes no difference, front or rear. It forms a Helmholtz resonator and the frequencies of interest have very long wavelengths, completely omnidirectional.
creator: Wayne Parham
date: 2006-02-23T14:36:02-00:00