Which 8 inch driver to use for the low end?

[jdm91]

Good Evening everyone ,

Me and my friend was wondering about a few drivers that are fullrange 8 inch woofers from fostex? The model numbers from fostex are;

1. FE 208ez

2. FF 225wk

3. Fw 208n

I going to be building speakers for a friend and this is what was asked? Does anyone have any ideas or helpful hints? Money wise worth it or not worth it? He is looking for a 8 inch drivers that can play fullrange and these are the ones I have seen. Jeff

[Melo theory]

Well, what kind of enclosure would you like to build?
The first one is definitely best in a BLH (back loaded horn)
Number 2 and 3 are more flexible in regards to enclosures.

[jonparkhurst]

Evening. I still am young enough that I have some top end left. The fostex 225 will not satisfy you in the top end no matter the enclosure. You will need a tweeter. FYI. I can not speak to the others but in the right box the tang band 1772 and 1808 work nice, but price is higher. What about a mark audio or the Dayton audio 8 ????

[Melo theory]

Yeah, also the Fw208n isn't a full range.

[jdm91]

Originally Posted by Melo theory

Well, what kind of enclosure would you like to build?
The first one is definitely best in a BLH (back loaded horn)
Number 2 and 3 are more flexible in regards to enclosures.

Enclosure kind? Well I would love a rear ported design if I can get away with it. Jeff

[jdm91]

Originally Posted by jonparkhurst

Evening. I still am young enough that I have some top end left. The fostex 225 will not satisfy you in the top end no matter the enclosure. You will need a tweeter. FYI. I can not speak to the others but in the right box the tang band 1772 and 1808 work nice, but price is higher. What about a mark audio or the Dayton audio 8 ????

Yes I was plaining on useing a super tweeter with the above 8 inch fullrange drivers. I am aware they don't go as high as the smaller fullrange drivers. Also I am looking for a 8 inch driver that can go as high as it will let me. Tang band I have not looked into and the dayton looks nice but, does not go high enough for me. Jeff

[jdm91]

Originally Posted by Melo theory

Yeah, also the Fw208n isn't a full range.

Ya I must have miss read the response graph. Thanks for pointing that out. Jeff

[Melo theory]

well....here ya go bud

http://www.brinesacoustics.com/Pages/B18-F225/Main.html

[tvrgeek]

Originally Posted by jonparkhurst

Evening. I still am young enough that I have some top end left. The fostex 225 will not satisfy you in the top end no matter the enclosure. You will need a tweeter. FYI. I can not speak to the others but in the right box the tang band 1772 and 1808 work nice, but price is higher. What about a mark audio or the Dayton audio 8 ????

Totally agree. It seems like a "fullrange" needs a sub and a helper tweeter. I may be old, but I call that a three way.

[Melo theory]

I agree with this if the full range is too large.
What I like is a 3" full range with helper woofers.
That way you can cross them really low and avoid a lot of problems such as time alignment, polar response, phase anomalies and group delay around the crossover, (you can use shallower slopes) just to name a few.
Most 3" drivers will behave up top and will only get wonky above 10kHz off axis.
You can cross most 3" FR at 500Hz 1st or 2nd order.
I call this configuration FRA (full range assisted)
Instead of FAST (fullrange and subwoofer technology)
The later is crossed lower and should be used with subwoofers...as per the acronym.
I got this idea from sreten. (the FRA acronym)