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Old 23rd September 2012, 07:01 PM   #31
sreten is online now sreten  United Kingdom
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Hi,

A 1/4 wave cabinet that worked fine with the original driver unstuffed, still
had boomy bass completely stuffed with fibreglass with the new driver.

rgds, sreten.
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Old 23rd September 2012, 07:04 PM   #32
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What size driver and crossover point?
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0 Phase Constant Voltage Series Crossovers.
1/4 W T-lines for Satellites and Subwoofers
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Old 5th January 2013, 09:45 PM   #33
padman is offline padman  United Kingdom
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Try morel caw638 and scanspesk d2905
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Old 23rd January 2013, 08:30 PM   #34
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Quote:
Originally Posted by sreten View Post
Hi,

A 1/4 wave cabinet that worked fine with the original driver unstuffed, still
had boomy bass completely stuffed with fibreglass with the new driver.

rgds, sreten.
I would suggest using low density polyurethane foam for the damping material.
Approximately 60% in the first third of the line length. Reducing the foam to 40% in the middle and about 15-20% in the last section of the line. Place the foam in the line between the cabinet walls and not up against them.
A free flow of air must occur in the line.

I would be more than happy to send you an email of the many examples I have.

Fiberglass is very reactive and does act as a no pass filter in T-lines if heavily stuffed.

Many commercial designs do use the foam.
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0 Phase Constant Voltage Series Crossovers.
1/4 W T-lines for Satellites and Subwoofers
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Old 24th January 2013, 02:55 PM   #35
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Quote:
Originally Posted by 5th element View Post
You know I'm sure I've seen a basket design that looks like the rear of that before, specifically the casting around where the screw holes/flange are, it isn't Audax, but I cannot quite remember what, either that or I am remembering incorrectly!
They look like older Focal carbon fibre drivers. i had a pair with papercone that had nearly exactly the same shape basket. i saw some on ebay USA last year if your lucky.
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Old 8th July 2013, 09:15 PM   #36
bug2k11 is offline bug2k11  United Kingdom
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Finally got round to fitting the replacement drivers I picked up last year!
Just a bit of routing of the recess and the enlarging the mounting hole a little, the new Seas CA18RLY fits fine.

Also cleaned off the original dark stain from the cabinets and just used a clear danish oil to finish them, an improvement I think.

Haven't wired up the crossovers yet of run them yet, I'll get that done and compare the response with standard drivers later this week.

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