A question about front-ported speakers

Sprink -

sounds as if you know this but in the hopes of being helpful...

sounds as though you are setting up a near-field monitoring situation. the generally recommended math is an equilateral triangle - meaning that the speakers are as far apart as they are from you

finally - don't torment yourself with what might happen some day in the future. get the right speakers for you today. 2 years is a long time and it is more then likely that your tastes will change. It is also entirely possible that the smaller speakers will work well in the bigger room.

enjoy

Thanks for all the detailed responses.I know every situation is different and mine is definitely not ideal.I'm trying to choose between Paradigm Studio 40's and 60's.The 40's are 13 inches deep, and at 10 inches off the back wall they are 7' to the front from me.Eventually I plan to move to a bigger room, say in 2 years or so, so I've been toying with the idea of the 60's.The 60's are 17" deep, so I would have to put them about 5 inches from the wall in order to keep them, almost literally, out of my face.I have some research to do, and thanks again for the info.

I have my speakers 6" from the rear wall and they work great!
The ports are front-firing.

But- the front of the speaker is about 2 1/2 feet from the rear wall, so maybe they don't count?

Why I like bottom porting, designer knows distance to floor and can design for it, front and rear port its up to user to hopefully find best placement.

Trying to read between the lines here...

In my experience I have found that you can get a front ported speaker closer to the walls then a rear ported speaker.

That said, YMMV = no substitute for trying it in your space.

Keep in mind that in many cases a rear port design is used to add bass - closer to the wall will add more.

Acoustic suspension speakers are great but also placement sensitive and are generally power hogs.

If you haven't done so I would suggest you check out the Cardas site for his comments on how to place speakers. There are also some good threads here and on Asylum on the topic. Generally you will see that your position relative to the speakers is also important, and that your position relative to the wall behind you will also have a major impact.

Few things in this hobby require as much trial and error as optimizing speaker placement.

Paradigm make some good in walls too - so consider these.

There are speakers designed for placement against the wall - Audio Note, older Linn, etc

I have personally had both front ported and acoustic suspension designed large speakers. BOTH have sounded much better out into the room.

I don't know your room size, but you might reconsider "getting far away" from your speakers.

Richard

It depends on what sort of environment the designer tuned the speakers for. The port tuning will be the designer's best guess as to what will work well given the speaker's anticipated environment. In the real world, low-frequency room acoustics varies enormously so the ideal tuning for a given application may be different from what the speaker left the factory with. Not many manufacturers offer user-adjustable tuning, but if you don't mind improvising you can adjust it anyway.

If you find there's too much bass close to the walls, either increase the port length or reduce the port diameter or both, thereby lowering the tuning frequency and hopefully transforming undesirable "boominess" into deeper extension. This can be accomplished with a section of PVC pipe wrapped with just enough electrical tape to give you a snug friction fit in the existing port (I've never actually done this but it's what I'd do in your situation). There is a chance that you'll introduce some port noise or bass compression at very high volume levels.

Once you've made a speaker choice, feel free to e-mail me with enclosure and port dimensions, and I'll do some calculating and offer a suggestion or two.

Duke
dealer/manufacturer