Dr. Gedlee interview - bass extension

[blue934]

just finished reading an interview of Dr. Gedlee in voice coil magazine. would like a brief expansion of what he said, possibly by the Dr. himself, if available.
"...often too much midrange performance is sacrificed for an extended low end... Better... is to make the main speakers have reasonable low end ( but not extended at the sake of the mids), and then to extend the low end, when required, through the use of subs - the more the better."

i agree with the concept of matching the mains to the subs but i am curious about what frequency range(s) in the mids are affected by modeling a box for different bass extension and by how much?

thanks
blue934

[sreten]

Hi,

He may be talking about the bass/mid driver choice in the first place,
not the alleged "detrimental" effects of bass loading on the midrange.

/sreten.

[gedlee]

Originally posted by blue934

i agree with the concept of matching the mains to the subs but i am curious about what frequency range(s) in the mids are affected by modeling a box for different bass extension and by how much?

I was referring to the fact that bass extension can only come with cone excursion increases. I believe that crossovers are evil things to be avoided at nearly all costs (obviously you have to have at least one IMO). This necessitates taking the woofer very high in frequency by many standards. The wide bandwidth of this choice aggravates problems related to cone excursion. So, to me, its not a good idea to extend the bass, especially since multiple subs work better anyways, if its going to muddy the mids near the crossover.

This is what I meant by the system design making nonlinearity irrelavent.


Is this clearer?

[blue934]

yes , i see what you where referring to. thanks for the reply

blue934

[gedlee]

A common point of confusion is "GedLee" versus "Geddes".

GedLee is the company name which comes from Geddes/Lee, Dr. Lidia Lee being my business partner as well as my wife. My name is Earl Geddes.

Lidia had an academic publishing trail and changing names can be a problem. Also, in the Asian culture, wifes do not take on the husbands family name, although all the children do. So we found a compromise which mostly works.

[JRace]

I keep thinking the front man for Rush has a side job...

[gedlee]

I hear that a lot. I didn't even know the name Geddy Lee when we did this. I don't know if it would have made a difference or not.

[planet10]

Men are from pluto, women from venus sub-thread split off to Texas...

[anatech]

Hi Dave,
Gee, I wasn't done yet! You take all my fun away.

-Chris

[sdclc126]

Originally posted by planet10
Men are from pluto, women from venus sub-thread split off to Texas...

Men are from Mars.

It's cold and dry.