Discussion about ported bookshelves/towers with sealed subwoofers

[simon5]

Hi,

There's alot of sealed subwoofer lovers around here and everywhere else. I guess the group delay caused by a ported subwoofer is a lot irritating to them.

I also see that a good portion of those are using ported bookshelves/towers speakers, to extent the bass response they say, to use a lower crossover on the subwoofer.

If they can hear group delay on a subwoofer tuned at 25 Hz for example, why they can't hear group delay on a bookshelf/tower tuned at 80 Hz?

It seems pointless to me to use a ported bookshelf/tower if you want to avoid the group delay problem caused by ported subwoofers.

I want to know if I'm missing something? I mean if you tune around 80 Hz, an instrument playing at that frequency will be almost two full cycles behind other frequencies.

It's a strange behavior IMHO, but maybe I'm plain wrong and I would like to know it if it's the case.

I hope to get alot of opinions on this!
Thank you very much!

[BAM]

Plug the port with some open cell foam, turning your bass reflex port into an aperiodic vent. Next best thing to sealed bookshelves. Group delay can be offensive in subwoofers but it is even more offensive to most when it occurs in the midbass. It's generally accepted that if you have a subwoofer, you want to plug the vent on your main speakers.