Which 8 inch driver to use for the low end? - diyAudio
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Old 26th October 2012, 02:48 AM   #1
jdm91 is offline jdm91  United States
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Default Which 8 inch driver to use for the low end?

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
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Old 26th October 2012, 03:33 AM   #2
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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.
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Old 26th October 2012, 03:40 AM   #3
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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 ????
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Old 26th October 2012, 03:44 AM   #4
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Yeah, also the Fw208n isn't a full range.
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Old 26th October 2012, 07:34 PM   #5
jdm91 is offline jdm91  United States
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Quote:
Originally Posted by Melo theory View Post
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
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Old 26th October 2012, 07:35 PM   #6
jdm91 is offline jdm91  United States
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Quote:
Originally Posted by jonparkhurst View Post
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

Last edited by jdm91; 26th October 2012 at 07:39 PM.
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Old 26th October 2012, 07:37 PM   #7
jdm91 is offline jdm91  United States
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Quote:
Originally Posted by Melo theory View Post
Yeah, also the Fw208n isn't a full range.

Ya I must have miss read the response graph. Thanks for pointing that out. Jeff
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Old 26th October 2012, 08:08 PM   #8
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well....here ya go bud

http://www.brinesacoustics.com/Pages/B18-F225/Main.html
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Old 26th October 2012, 09:09 PM   #9
tvrgeek is offline tvrgeek  United States
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Quote:
Originally Posted by jonparkhurst View Post
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.
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Old 26th October 2012, 09:28 PM   #10
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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)
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Last edited by Melo theory; 26th October 2012 at 09:35 PM.
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