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Multi-Way Conventional loudspeakers with crossovers

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Old 14th February 2003, 04:01 AM   #1
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Default Cute Lil' TL

I made a speaker box, WooHoo

No idea on the speaker (a 10" from some console), so consulting you guys wouldn't have much effect, so I hear (though I did once try measuring free-air resonance, something like 40Hz). So I went about it arbitrarily, myself.

I took a 12" square of 3/4" particle board and cut a 9" hole for the speaker, front piece. 12x15" back panel, same board. The rest is 3/4" plywood: two sides 13.5x15", top and bottom 13.5" squared.
The TL part is formed by the front falling 3" from the top; a baffle extends into the box, perpendicular to the front, to form some 'line'. I slapped on a 2x4, perpendicular to the baffle, and attached to its end, to bend around the line a bit more and add overall stiffness.

So far it sounds good, but ARGH, I need more power!! Neither a 6L6GC SE nor 7x12AU7 PPP are adequate.

I can make a scale drawing in Paint, however any photos will be months off due to Dad being very lazy in developing the film..

Tim (I'm a Big Boy, I can use a table saw )
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Old 14th February 2003, 05:46 AM   #2
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Here's the rough drawing:

Click the image to open in full size.

The scale is 16 pixels to an inch.

Tim
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Old 14th February 2003, 07:12 AM   #3
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Nice project . Don't you have a cheap transistor amp, it looks like the speaker is <84 db.
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Old 14th February 2003, 07:53 AM   #4
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Not really long enuff to support a 1/4 wave... probably more of a BR unless you stuff the be-jezuz out of the port.

dave
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Old 14th February 2003, 03:58 PM   #5
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Actually, I have a transistor amp pulled from a console...stereo...come to think of it it may even be the amp that originally powered this speaker...lol.
I need to mod it up, put a volume control on it (very sensitive) and put it in some sort of box.
(Not to mention replace the 470uF output coupling caps!)

If it's not long enough, maybe that's why it seems to peak a little around 100-200Hz (SWAG). Maybe extend past the 2x4 to a few inches from the bottom?

Tim
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Old 14th February 2003, 08:14 PM   #6
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Default Mod

Modified the thing a little today.

Ripped out the back, put in a baffle to extend the 2x4 by 4" (leaving a 4" gap between the end of this baffle and the bottom of the box), added a little more caulk on the inside corners, and stapled in some fiberglass batting for fill.
Mmm?

Tim
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Old 14th February 2003, 09:28 PM   #7
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Updated diagram attached.

Tim
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File Type: gif cutetlgif.gif (10.9 KB, 266 views)
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Old 16th February 2003, 11:34 PM   #8
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was this all of your scrap wood or was there a reason for a 2x4, plywood, and MDF and the locations they were used?
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