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Old 24th April 2012, 03:38 PM   #1
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Default Fountek FR135EX?

I did a search here but found no info. Has anyone ever tried this driver full range? Opinions?
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Old 24th April 2012, 04:57 PM   #2
sreten is offline sreten  United Kingdom
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Hi, http://www.madisound.com/pdf/FR135EX-Encl.pdf, rgds, sreten.
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Old 24th April 2012, 06:15 PM   #3
chrisb is offline chrisb  Canada
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Quote:
Originally Posted by sreten View Post
of the scores of FR drivers that many of us haven't yet played with, these are another one

Fountek FR135EX 5" Full Range: Madisound Speaker Store


personally, after underwhelming experience with the FR88EX, at $102 ea* this is one I'm not eager to taste test on my own dime

* Fountek isn't the only brand victim to the vagaries of cost "fluctuations" on Neo, and I wouldn't hold my breath waiting for current price levels to change, or distributors such as Madisound, PE, et al to write down stale inventory

Thanks Sreten for posting the link to enclosure / filter circuit design - as I seldom pay particular attention to such documentation, this is the first time I can recall seeing a manufacturer's impedance graph posted for a full range driver including EQ . Are those substantial peaks in the impedance around 1200 and just over 10K typical results of of such networks, and how does one reconcile those with what appears to be a relatively minor change in the presumably on-axis FR above say 300Hz?
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Old 24th April 2012, 06:27 PM   #4
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Thank you both for the responses. This driver is on my list for possible use in an OB design application I have been working on. Although the specs look attractive at the onset, I felt it was a bit pricy as well as being a little troublesome in the upper end for a passive correction circuit. Sometimes these issues are worth the extra effort if the driver has a high degree of accuracy and sounds good as well. In this case maybe not.

Matthew
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Old 24th April 2012, 06:30 PM   #5
chrisb is offline chrisb  Canada
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Quote:
Originally Posted by harvylogan View Post
Thank you both for the responses. This driver is on my list for possible use in an OB design application I have been working on. Although the specs look attractive at the onset, I felt it was a bit pricy as well as being a little troublesome in the upper end for a passive correction circuit. Sometimes these issues are worth the extra effort if the driver has a high degree of accuracy and sounds good as well. In this case maybe not.

Matthew

keep in mind that in only 2 replies in this thread so far, no-one has noted any experience with these - they might sound quite fine - it certainly wouldn't be the first time that published graphs didn't tell the whole story
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Old 24th April 2012, 06:38 PM   #6
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Quote:
Originally Posted by chrisb View Post
keep in mind that in only 2 replies in this thread so far, no-one has noted any experience with these - they might sound quite fine - it certainly wouldn't be the first time that published graphs didn't tell the whole story
I havn't pulled the plug just yet. Just doing the research.

Cheers
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Old 24th April 2012, 07:00 PM   #7
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Quote:
Originally Posted by chrisb View Post
this is the first time I can recall seeing a manufacturer's impedance graph posted for a full range driver including EQ
Boy those filters sure make the impedance curve ugly.

dave
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Old 24th April 2012, 08:10 PM   #8
sayrum is offline sayrum  Germany
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here is a build with the bigger brother -fountek fw146- incl filter (notchn). In a br-enclosure.
Bremen-Audio DIY-Lautsprecher Einsteiger MAXI-AL


here
Maxi-AL Bausatz im Angebot bei SpectrumAudio - Spezialvertrieb für Breitbandlautsprecher und mehr
a fr "guru" says the fr135 works very well in the same br-enclosure without the filter, since it dosen't have the resonances (cone break up?) in the high frequencies (?) as his bigger brother does..

good luck with your findings!
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Old 24th April 2012, 09:52 PM   #9
sreten is offline sreten  United Kingdom
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Hi,

FWIW I can't reconcile the various curves filters info etc, though the idea
an impedance curve is "ugly" is a new one on me, it is what it is, the kink
at 1KHz is a driver issue. The peaks are inevitable with series filters.

rgds, sreten.
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Old 24th April 2012, 11:44 PM   #10
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Quote:
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though the idea an impedance curve is "ugly" is a new one on me
My favorite amps have highish output impedance so a monotonic impedance curve is sought after (ignoring box resonance)

dave
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