Mini DIY

[John W]

Here are my 4425 minis mid-finish. The black fronts are just primed and I need to stain and oil the sides. They are built from 3/4 mdf with a wavy grained cherry venneer. I made a rabbet cut front and back to scale the sides like the original.
The parts for the crossover are on order.

[dancing-dave]

Here are my 4425 copies mid-finish. The black fronts are just primed and I need to stain and oil the sides. They are built from 3/4 mdf with a wavy grained cherry venneer. I made a rabbet cut front and back to scale the sides like the original.
The parts for the crossover are on order.

You are my hero.

[Robh3606]

Those look great!! Good selection on the woofer, that makes it look even more like a scaled down version. Can't Wait to hear how these mini's sound.

Rob

[Zilch]

SUPER, John W!

PM me your mailing address for your grille cloth for them....

[Zilch]

1) 2404H-1 #1 impedance
2) 2404H-1 #2 impedance
3) 115H-1 #1 impedance, Q/Fs
4) 115H-1 #2 impedance, Q/Fs
5) 4406 network impedance, unboxed drivers connected

[johnaec]

I found I have some 12-ply 5/8" baltic birch pieces in the garage - 'probably enough for 2 cabinets. What I'm thinking is that since these are so small, we can use mitre joints at the 4 outside edges, since those are the only important ones concerning clean seams. That way, the grain could be stained walnut, and eliminate the whole veneer thing. I think they'd look great, (the grain is nice), - what do you think?

John

[Zilch]

6) 4406 circuit simulation
7) Actual network voltage drive, 8-Ohm dummy loads
8) 2404H-1 performance on network RTA
9) 2404H-1 performance on network MLS

Approx. 10 - 12 dB additional HF attenuation required to balance....

[johnaec]

Here are my 4425 minis mid-finish.

Way kool! Now I'm really getting excited!

John

[Zilch]

I found I have some 12-ply 5/8" baltic birch pieces in the garage - 'probably enough for 2 cabinets. What I'm thinking is that since these are so small, we can use mitre joints at the 4 outside edges, since those are the only important ones concerning clean seams. That way, the grain could be stained walnut, and eliminate the whole veneer thing. I think they'd look great, (the grain is nice), - what do you think?

That'll work too, I betcha.

[John W]

What I'm thinking is that since these are so small, we can use mitre joints at the 4 outside edges, since those are the only important ones concerning clean seams.

This is basically the method I used. I veneered these prior to cutting the miters since the veneer was a little wavy and I wanted to make sure it was clamped tight.
One suggestion is to try and have lots of clamps on hand for the glue up. 4 front and 4 back on the corners.

[norealtalent]

You guys are amazing Nice work!

[johnaec]

Zilch - I've calculated the internal dimensions of the L20T, (maybe I'll see what I can come up with for the 4406 also). Anyway, the L20T is 704.32 cu. in. gross inside volume. (I'll calculate the depth of the mini's based on this). I'm also roughly calculating the 2404 at about 30 cu. in. greater internal displacement than the 035Ti - I'll also compensate for this. The port is 1.875" inside dia, and 3.875" in length. Can this be broken down to two ports for the same 704 cu.in. volume, so that we might be able to fit them on the front? Otherwise, I think a single port will have to go on the back, like the L1's.

John

[Zilch]

Hi, John.

It seems to be tuned to 60 Hz. Two 1.5" ports 5.85" long (maybe less) will do the same job.

Now that I have the volume, I can play with the numbers a bit in BB6P.

I also want to see what can be achieved with heavy damping, which wants rear porting. PM me the final volume, please....

[johnaec]

PM me the final volume, please....

?? I was just going to use the same volume, plus 30 cu. in. more for the extra space taken by the 2404 - so ~734 cu. in., (which would equate to the same 704 cu. in. with the 2404). I just need to calculate the depth to end up with that...

John

[Zilch]

Yup, that's what I'm using. Let me know if there's any "adjustments," is all, like from 4406 measurements....