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Multi-Way Conventional loudspeakers with crossovers

JBL L110 new cabinets
JBL L110 new cabinets
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Old 24th April 2019, 04:38 PM   #11
6thplanet is offline 6thplanet  United States
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Might not matter to flush the woofer in, but it'll definitely look better to do it.
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Old 24th April 2019, 05:49 PM   #12
Kay Pirinha is offline Kay Pirinha  Germany
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Plywood looks fine and is rather beefy. OTOH, it's inner damping isn't that of chipboard, and less than ever that of MDF. So you need (more) bracing. DonT' forget to add the cleats' volume to the internal volume.
Are there any construction drawings?

Best regards!
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Old 25th April 2019, 02:18 AM   #13
mainframe99 is offline mainframe99
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This is about building cabinets that look good or much better than the current ones. I will be attempting to flush mount all the drivers. Hopefully it wont change the sound, time will tell. Easy to correct buy making spacer plates later.

Kay Pirinha - I have the designs sketched on grid paper while I have been designing electrical installations for 10 years I am not proficient in CAD (I outsource my cad drawing). I see LOADS of software is available for box design, but all far beyond my abilities. This is mostly because the specifications of the drivers I am using is unknown. Would you be able to recommend software that a simpleton like me could use to create the box design ONLY, i.e. dimensions, volumes, cutouts, ports and bracing?. No need for x-overs, driver specs or complex calculations, as that has already been done by JBL. I know how much this forum loves these things though
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Old 25th April 2019, 10:20 AM   #14
mainframe99 is offline mainframe99
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wish me luck flush mounting these drivers without a cnc machine

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Old 25th April 2019, 12:36 PM   #15
Kay Pirinha is offline Kay Pirinha  Germany
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Maybe I should tell you that I didn't ask you for a set of L112 drawings. So I assume that you did your own measurements to have your scetches? And no, I also am not capable to operate CAD software .


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Old 25th April 2019, 02:10 PM   #16
phivates is offline phivates  United States
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See "How to router this driver" post #10 in the Construction Tips forum
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Old 25th April 2019, 04:42 PM   #17
6thplanet is offline 6thplanet  United States
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How do you countersink odd shaped drivers? -

Techtalk Speaker Building, Audio, Video Discussion Forum

Goto the end of this post and the archived link is posted
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Old 25th April 2019, 09:23 PM   #18
mainframe99 is offline mainframe99
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Quote:
Originally Posted by phivates View Post
See "How to router this driver" post #10 in the Construction Tips forum
We have a winner. Awesome!
For anyone else interested -
Flush mounting irregular shape driver
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Old 25th April 2019, 10:35 PM   #19
phivates is offline phivates  United States
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I am watching this one since I have a near-pair of similar boxes, 4311 and 4311B, in the queue. A torn woofer, dented mid dust caps, yadda cetera.

I hate seeing rusty fasteners. The good stuff can stand the abuse I guess. I started out in the AR camp back in the sixties so I'm late to the JBL party...I'll have to have a party when these are playing.

Last edited by phivates; 25th April 2019 at 10:41 PM.
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Old 26th April 2019, 09:14 AM   #20
mainframe99 is offline mainframe99
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Let the games begin.

Strip the old boxes

Click the image to open in full size.

Click the image to open in full size.

Cut out the new panels from a sheet of 25mm fire rated MDF. Fire rated?? I got it for the same price as standard because it was all they had.

Click the image to open in full size.

Not sure how to do bracing, as the crossover can only fit due to port (and be accessible in future) in the same place JBL have it. May be able to do a U shaped brace - watch this space. Excuse my slip up with the router, at least its only the back!

Click the image to open in full size.
Click the image to open in full size.
Click the image to open in full size.

And at last, a mirror image pair coming up

Click the image to open in full size.


So problems:

Bracing will be tricky with the large crossover board on the back panel. I have an idea. Any bracing's gotta be better than what JBL had, right? -none.

As one of the L-pad covers was missing from the original speakers, I will move them to the rear panel to be out of sight.

Future veneer over the crossover screws. I have a plan for this.

All the drivers have rusty fixings. Easily taken care of. I need new x-over and driver fixings all around as the old ones are now not long enough due to my thicker cabinet.

Will need to get a back-wave chamber for the mids into the new cabinets. At the moment thinking about just cutting the existing ones out and gluing into the new cabinets.

My router sucks ***. But a good tradesman never blames his tools.


Honestly, open to criticisms here as this is my first speaker project and I want to learn the hard way!
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