TQWT Gradient W 160 AL - diyAudio
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Old 27th January 2004, 08:48 PM   #1
weidok is offline weidok  Netherlands
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Lightbulb 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
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Old 28th January 2004, 06:17 AM   #2
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Default Re: TQWT Gradient W 160 AL

What is a Gradient W 160 AL 8?

An aluminum 8"?

Got a URL?

dave
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Old 28th January 2004, 07:43 PM   #3
weidok is offline weidok  Netherlands
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Default 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
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Old 28th January 2004, 08:23 PM   #4
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Looks like it should be good in a TL... you also need the BL to plug the thing into Martin's Worksheets/Tables

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Old 28th January 2004, 10:29 PM   #5
weidok is offline weidok  Netherlands
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Default 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 !!
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Old 29th January 2004, 07:31 AM   #6
GM is offline GM  United States
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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
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Old 29th January 2004, 07:51 AM   #7
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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
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Old 2nd February 2004, 01:30 PM   #8
Rudolf is offline Rudolf  Germany
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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.
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File Type: jpg grad_range.jpg (43.3 KB, 155 views)
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Old 2nd February 2004, 09:36 PM   #9
weidok is offline weidok  Netherlands
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Thumbs up 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 ?
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