TQWT Gradient W 160 AL

weidok · 27th January 2004, 07:48 PM

Hello
I am planning to build a TQWT or TL ?? with Gradient W 160 AL 8 who can help
do i need to use tweeters

planet10 · 28th January 2004, 05:17 AM

What is a Gradient W 160 AL 8?

An aluminum 8"?

Got a URL?

dave

weidok · 28th January 2004, 06:43 PM

Yes it is here are the spec's
Nennimpedanz/Gleichstromwiderstand: 8 / 5,94 Ohm
Resonanzfrequenz: 43 Hz
Gütefaktoren(Qms/Qes/Qts): 2,3 / 0,62 / 0,5
Äquivalenzvolumen(Vas): 20 Liter
Effektive Membranfläche(Sd): 125 cm²
Schwingspulenüberhang(Xmax): 3 mm
Schwingspuleninduktivität(Le):0,47 mH

planet10 · 28th January 2004, 07:23 PM

Looks like it should be good in a TL... you also need the BL to plug the thing into Martin's Worksheets/Tables

dave

weidok · 28th January 2004, 09:29 PM

BL is 5,92 Tm
Yes TL or TQWT
there was in 2003 already a thread on this speaker
it sames to be a fullrange too spl is 87 dB !!

GM · 29th January 2004, 06:31 AM

I am not much into pure TLs, but I did a ML-TL awhile back for someone and you can use stuffing at the vent to get a ~TL like roll off/transient response if it is too boomy in-room. Let me know if you are interested.

GM

planet10 · 29th January 2004, 06:51 AM

Quote:

Originally posted by GM
Let me know if you are interested.

GM seems to be able to do these ML-TLs in his sleep

I'd take him up on his offer. The couple designs of his i built turned out well.

dave

Rudolf · 2nd February 2004, 12:30 PM

Hi everyone,

seems I was the one GM helped doing some simulations for the W160 AL. I have built a 42" MLTQWT following his plan and am very satisfied.
The Gradient W160 AL is a quite affordable aluminium woofer with lots of resonances in the upper frequency range.
http://www.spectrumaudio.de/breit/gradientW160AL8.html

German magazine Klang+Ton recommended to just ignore the resonances and use the woofer as a fullrange driver. Those people were right. The Gradient W160 AL represents a philosophy opposite to most Fostex fullrange drivers: Bass down to 30 Hz is no issue and enough Xmax - but highs should be more refined.

weidok · 2nd February 2004, 08:36 PM

thanks Rudolf i am going to build a TQWT but what to do with to
much treble? can i have the dimensions in cm's please
Do you use a subwoofer playing with the Gradient ?

27th January 2004, 07:48 PM	#1
weidok diyAudio Member Join Date: Jan 2004 Location: dkm	TQWT Gradient W 160 AL Hello I am planning to build a TQWT or TL ?? with Gradient W 160 AL 8 who can help do i need to use tweeters __________________ There is NoBox like NoBox

28th January 2004, 05:17 AM	#2
planet10 frugal-phile(tm) diyAudio Moderator Join Date: Oct 2001 Location: Victoria, BC, NA, Sol III Blog Entries: 4	Re: TQWT Gradient W 160 AL What is a Gradient W 160 AL 8? An aluminum 8"? Got a URL? dave __________________ community sites t-linespeakers.org, frugal-horn.com ........ commercial site planet10-HiFi p10-hifi forum here at diyA

28th January 2004, 06:43 PM	#3
weidok diyAudio Member Join Date: Jan 2004 Location: dkm	Gradient Yes it is here are the spec's Nennimpedanz/Gleichstromwiderstand: 8 / 5,94 Ohm Resonanzfrequenz: 43 Hz Gütefaktoren(Qms/Qes/Qts): 2,3 / 0,62 / 0,5 Äquivalenzvolumen(Vas): 20 Liter Effektive Membranfläche(Sd): 125 cm² Schwingspulenüberhang(Xmax): 3 mm Schwingspuleninduktivität(Le):0,47 mH __________________ There is NoBox like NoBox

28th January 2004, 07:23 PM	#4
planet10 frugal-phile(tm) diyAudio Moderator Join Date: Oct 2001 Location: Victoria, BC, NA, Sol III Blog Entries: 4	Looks like it should be good in a TL... you also need the BL to plug the thing into Martin's Worksheets/Tables dave __________________ community sites t-linespeakers.org, frugal-horn.com ........ commercial site planet10-HiFi p10-hifi forum here at diyA

28th January 2004, 09:29 PM	#5
weidok diyAudio Member Join Date: Jan 2004 Location: dkm	Gradient W 160 BL is 5,92 Tm Yes TL or TQWT there was in 2003 already a thread on this speaker it sames to be a fullrange too spl is 87 dB !! __________________ There is NoBox like NoBox


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29th January 2004, 06:31 AM	#6
GM diyAudio Member Join Date: Jun 2003 Location: Chamblee, Ga.	I am not much into pure TLs, but I did a ML-TL awhile back for someone and you can use stuffing at the vent to get a ~TL like roll off/transient response if it is too boomy in-room. Let me know if you are interested. GM __________________ Loud is Beautiful if it's Clean! As always though, the usual disclaimers apply to this post's contents.

2nd February 2004, 08:36 PM	#9
weidok diyAudio Member Join Date: Jan 2004 Location: dkm	to much treble ??? thanks Rudolf i am going to build a TQWT but what to do with to much treble? can i have the dimensions in cm's please Do you use a subwoofer playing with the Gradient ? __________________ There is NoBox like NoBox

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