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cheap 4" drivers in Australia, how are these?
cheap 4" drivers in Australia, how are these?
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Old 24th March 2018, 08:55 PM   #11
tilroh is offline tilroh  Australia
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Join Date: Mar 2008
Location: Brisbane QLD
Funny you should say that, I'm searching the thread for drawings.
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Old 25th March 2018, 05:29 AM   #12
hollowboy is offline hollowboy  Australia
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Join Date: Jul 2007
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Quote:
Originally Posted by tilroh View Post
Is there an advantage in having two identical drivers per box?
You can run the 2nd driver just for bass support (look up "baffle step compensation" to see what I mean, but the price of the inductor required might a bit high, for a low budget project.
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Old 25th March 2018, 05:42 AM   #13
tilroh is offline tilroh  Australia
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Thanks HB, I’m going to use a Dayton SD215 DVC subwoofer currently crossed at 100hz. I was hoping to find a way to get the TC9s to go that low.
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Old 28th March 2018, 09:25 AM   #14
tilroh is offline tilroh  Australia
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Quote:
Originally Posted by pandax View Post
Maybe you should consider a 0.53x karlsonator with the 4 TC9 you just ordered ?
Those Karlsonators have been bothering me for a while so I've decided to do just as you suggest. I'm planing on using 4-5mm ply tho.
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Old 2nd April 2018, 08:29 AM   #15
tilroh is offline tilroh  Australia
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Join Date: Mar 2008
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Default I Karlsonated

I went with 4mm ply and hot glue and Tarzan expanding glue. I think 4mm ply is way too thin, you can feel them vibrate with the music. I might glue 12mm ply on the slides to try and stabilize them.

Pics and quick measurement.


I was listening to a pair of Bob Brines MLTLs with MA 7.3 grey cones before hooking up the Karlsonators. I shouldn't have done that.

Last edited by tilroh; 2nd April 2018 at 08:31 AM.
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Old 16th April 2018, 05:48 AM   #16
oohms is offline oohms  Australia
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Sounds like you have what's needed to clone a Nola Brio Trio

Need help building open baffle/bass reflex hybrid
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Old 20th April 2018, 01:35 PM   #17
tilroh is offline tilroh  Australia
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Join Date: Mar 2008
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[QUOTE=oohms;5406859]Sounds like you have what's needed to clone a Nola Brio Trio

I'll finish the 4, 5.5L sealed boxed I'm building now and later make Brio clone open baffle tops for one pair.
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Old 25th April 2018, 09:30 AM   #18
tilroh is offline tilroh  Australia
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Join Date: Mar 2008
Location: Brisbane QLD
Finished the 5.5L boxes today and gave them a test.
They don't make it to 100Hz but are flat to about 12kHz.
I'm impressed.
Current XO is 100Hz so I'll order an (another) Active Line Level XO from China set to 175Hz.

Link to measurement and quickie boxes.

Last edited by tilroh; 25th April 2018 at 09:36 AM.
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