possilbe TL use

[theChris]

just wondering about using two of these per tower along with the two (per tower) tangband 871s:

DAYTON 7" ALUMINUM CONE WOOFER
http://www.partsexpress.com/pe/pshow...=295-335&DID=7

Specifications: *Power handling: 50 watts RMS/75 watts max *VCdia: 1-3/8" *Le: 1.15 mH *Znom: 8 ohms *Re: 5.90 ohms *Frequency range: 35-10,000 Hz *Fs: 36 Hz *SPL: 85 dB 1W/1m *Vas: .75 cu. ft. *Qms: 2.15 *Qes: .53 *Qts: .42 *Xmax 4.25 mm *Dimensions: Overall Diameter: 6-15/16", Cutout Diameter: 5-5/8",

i am thinking of using a 1st order crossover network at possibly 500hz. I think this would cut out the oddity up above 5000hz.

i have a low budget and would like something that has the following qualities:
not overly harsh on loud music like linkin park and system of a down.
not boomy on the same music.
not overly expensive
good imaging in general.

i don't have a large budget for speakers at all, so the dayton's, at $16 each, seem like a decent idea. another speaker that i was concidering was a vifa, i think it is still listed at apexjr, though i have been told it is out of stock.

[planet10]

The Q of these is such that they should do OK in a TL

dave

[GM]

I did a dual driver ML-TL for these awhile back for someone, but never heard from him so don't know how it sounds. Looks real good in a sim though.

WRT the rest, just looking at info/sims, between the severe breakup of the woofer and the limited excursion of the TBs, a 400Hz/2nd order XO will be required, plus some BSC if they won't be up against a wall or in a corner.

Looking like it could be a killer el cheapo system though.

GM

[Vortex]

I'm actually planning to build a TL (either QW or ML or classic..) for my two Fostex FE208EZ (newer ones), one driver per side.

I've seen lots of TL sites, but I still cannot design a TL with actual parameters so that I could build it.

Neither do I have a simulator program for it.

Perhaps you could help with some links or even exact data I really want to get the most out of these drivers.

Used will be with class-A 12W monoblocks and probably the upper region will be enhanced by Orca Raven R2s in series (2 x 4 Ohms).

But the Fostex.. ? Well, I want to go beyond the classical 40 Hz a bit, since I'm listening lots of drum-and-bass stuff, even if not on high volumes - among normal "audiophile"-grade music.

I would be pleased if you could help me designing a TL for these fullranges.

[joensd]

I'm actually planning to build a TL (either QW or ML or classic..) for my two Fostex FE208EZ (newer ones), one driver per side.

I've seen lots of TL sites, but I still cannot design a TL with actual parameters so that I could build it.

Neither do I have a simulator program for it.

Perhaps you could help with some links or even exact data I really want to get the most out of these drivers.

Used will be with class-A 12W monoblocks and probably the upper region will be enhanced by Orca Raven R2s in series (2 x 4 Ohms).

But the Fostex.. ? Well, I want to go beyond the classical 40 Hz a bit, since I'm listening lots of drum-and-bass stuff, even if not on high volumes - among normal "audiophile"-grade music.

I would be pleased if you could help me designing a TL for these fullranges.

Actually you just invaded somebody´s thread but anyway...
I am still trying hard to understand TL and the sort but gave a few links here.
Look at post 2+3, that´ll link you to some helpful sites/threads and the matchcad sheets from Martin King if you wanna design them yourself.
Otherwise pick a ready project from the net.

Cheers
Jens

[planet10]

Originally posted by Vortex
Fostex FE208EZ

The Q on these is probably too low to get a suitable TL...

dave

[theChris]

"WRT the rest, just looking at info/sims, between the severe breakup of the woofer and the limited excursion of the TBs, a 400Hz/2nd order XO will be required, plus some BSC if they won't be up against a wall or in a corner."
-i haven't done any though calculations on this. i may think about going up to a second order filter, but am unsure. by this i mean i just may restrict volumes to lower then max to limit it.

the amplifers will be built as monoblocks located either in the base or near the speakers cabnits themselves.

it's likely i'll have 1 amplifer channel available per speaker, just by an odd twist of fate. i may just put dedicated signal processors on each amplifier. i think i'll be able to do this without any problems.

[454Casull]

IIRC these drivers distort pretty badly...

http://mfk-projects.com/7_in_test.htm

[GM]

>I'm actually planning to build a TL (either QW or ML or classic..) for my two Fostex FE208EZ (newer ones), one driver per side.

I've seen lots of TL sites, but I still cannot design a TL with actual parameters so that I could build it.

====

Specs can be found here: http://www.madisound.com/fostex.pdf

====

>Neither do I have a simulator program for it.

====

MJK's Mathcad worksheets do a good job: http://www.quarter-wave.com/

====

>Used will be with class-A 12W monoblocks and probably the upper region will be enhanced by Orca Raven R2s in series (2 x 4 Ohms).

>But the Fostex.. ? Well, I want to go beyond the classical 40 Hz a bit, since I'm listening lots of drum-and-bass stuff, even if not on high volumes - among normal "audiophile"-grade music.

====

Just getting this driver to 40Hz will require considerable series resistance, and with very limited Xmax, will go non-linear at ~3W/70Hz, so average SPLs will be quite low if an uncompressed sound is to be maintained.

====

>I would be pleased if you could help me designing a TL for these fullranges.

====

I can, but I don't think you will be happy with the results if tuned down around Fs. Anyway, start a new thread if you want ot pursue this.

GM

[GM]

>IIRC these drivers distort pretty badly...

====

Thanks for the link. Some good info there.

Yeah, it's pretty obvious from PE's plot. They will need some sort of damping for best performance, but overall appear to be a good bargain. If I were still building, I'd have to try a dual ML-TL with them.

GM