TQWT with Gradient W160 AL and Tangband W3-871S - diyAudio
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Old 22nd October 2004, 01:43 PM   #1
kyote is offline kyote  Germany
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Default TQWT with Gradient W160 AL and Tangband W3-871S

Hello,
iI would like to build a TQWT with this speakers and want to know you say to my construction

Click the image to open in full size.

there are three parts:
- A socket (e.g. filled with Quarzsand)
- The TQWT-Bass-Part with the Gradient
- and a closed 6dm³ with the TB W3-871S

Some more data:
length of the Line: 127 cm
at the beginning: 126 cm²
at the end: 504 cm²
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Old 22nd October 2004, 06:05 PM   #2
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I think your concept is good. It depends on your power handling expectations and XO point for the W3-871S. I chose to make the box for the W3 a little smaller and XO a little high to get a significant power handling increase. I'm not finished with the XO yet but it's looking like a 2nd order around 500 Hz. I've been waiting since Sept 24 for my woofers to arrive from Acoustic Technologies. I guess 500Hz is actually considered low for a two way. I'm used to thinking full range for the W3
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Old 22nd October 2004, 08:25 PM   #3
joensd is offline joensd  Germany
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http://img52.exs.cx/img52/2679/100_1916copy.jpg
You mean something like this?
It sounds good (active 12dB-XO)but I reckon the TB needs a notch to better integrate.

Are you the guy from hififorum.de?

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Old 22nd October 2004, 08:37 PM   #4
joensd is offline joensd  Germany
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Quote:
Are you the guy from hififorum.de?
Just checked it myself.
So you know mine is a straight, unfolded, untapered TL.
Did you make a simulation with Martin´s software?
Wouldn´t mind if you´d send me the file.
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Old 22nd October 2004, 09:30 PM   #5
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Quote:
Originally posted by joensd

Just checked it myself.
So you know mine is a straight, unfolded, untapered TL.
Did you make a simulation with Martin´s software?
Wouldn´t mind if you´d send me the file.
I think, since the lower portion is intended for LF, there's less reason to position the driver in the center of the line. As long as you get good response to the XO point you should be able to move it up, along with the HF driver, to a height closer to ear level, IMHO.
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Old 22nd October 2004, 10:46 PM   #6
joensd is offline joensd  Germany
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Quote:
I think, since the lower portion is intended for LF, there's less reason to position the driver in the center of the line. As long as you get good response to the XO point you should be able to move it up, along with the HF driver, to a height closer to ear level, IMHO.
Yeah, I get that.
The Gradient was supposed to run fullrange but IMO the treble is not very good even in the sweetest of spots.
That´s why the TB had to help out.
As the front baffle is screwed I might just change the whole plan/baffle ...
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Old 22nd October 2004, 11:13 PM   #7
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I wish I had my woofers so I could get back to work on mine
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Old 23rd October 2004, 06:49 PM   #8
kyote is offline kyote  Germany
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Default XO

I too thought of an XO Freq of 500 Hz, but I'm a real newbie and wasn't sure i should post it.

Ithink i'm trying to get a Mic in the next month and start to make some measurings (i hope that's the right word) on my own.

Plan B is to contact a local dealer to ask for support.

@Timn8er: what a size would you recommend for the w3 chambre?

I'm don't get what tis sentence says:

Quote:
I guess 500Hz is actually considered low for a two way. I'm used to thinking full range for the W3
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Old 23rd October 2004, 07:54 PM   #9
joensd is offline joensd  Germany
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Most 2-ways have a crossover frequency of 2-3k as most of them have a tweeter instead of a 3"-fullrange.

I´m running the system at 338Hz-XO at the moment and I still have a lot of that fullrange-character.
Will definitely try a 24dB/12dB-XO at different frequencies and let you know how it turns out (although passive XO´s sound different anyway...)
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Old 23rd October 2004, 11:16 PM   #10
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Quote:
what a size would you recommend for the w3 chambre?
About 2.5 liter.
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