Tribute to Lansing-Heritage-Forum and DIY 2405 & 2446 & E145 build

[gdmoore28]

What beautiful work! Will be eagerly following your progress.

GeeDeeEmm

[Dr.db]

Thank you!

BTW, this is a sketch of what it is supposed to look like when finished

[dkalsi]

Although I am super impressed with your work, I do wish you post more pictures from the build.

I don't know about others, but I absolutely love looking through project build pictures. Gets me motivated to start my own project.

Great work and can't wait to see more.

Cheers,
D

[srm51555]

I don't know about others, but I absolutely love looking through project build pictures.
Great work and can't wait to see more.

Always!

Gets me motivated to start my own project.

Maybe

[Dr.db]

Although I am super impressed with your work, I do wish you post more pictures from the build.

I will try, but most of the time I´m alone at work and have no one around to take pictures during the process.
But if you have specific questions about the build, please feel free to ask

[berga12]

Are you still in time to round better the inner of the horn mouth? I see a "sharp" edge, the sound will not be so happy as the Quality of the construction is....

[Dr.db]

Do you mean the transition to the ~45° bevel ?

[berga12]

Do you mean the transition to the ~45° bevel ?

yes this one

[Jennifer]

Indeed. It had been air dryed over 10years and didn`t had much tension when sawing it.
It was very easy to work with...

Yes indeed, one rarely gets to see wood like that! In Portland Oregon we have Gilmer Wood, a place of woodworker dreams, but the prices are what they need to be for rare and exotic, so projects such as yours with such nice materials remain elusive for many... 10 year dry and stable has to be a dream to work with... and so nice on the eye!

[Dr.db]

I have choosen 1inch thick birch plywood for the cabinets.
I ordered a total of 18 square meters. That´s quit a lot, but I will brace the enclosures heavily

So far I have glued solid walnut strips to all edges. This is a lot of work, but I absolutly hate fringed edges and these enclosures shall last decades.



In the back you can see the veneer.
It is 2mm thick walnut veneer for the outside, and 2mm mahogany for the inside to function as back pull, so the boards will remain flat without twisting.

[Dr.db]

Boards have been veenered on this pics....

Frontbaffel is aprox. 2 inch thick.

[ARMED]

thats a lot of wood!!!









































thats what she said!

[mortron]

Beauty build so far. Love seeing slabs of wood become functional pieces of art. Even the tree would be honoured.

I am curious why you chose the bass drivers you did? Will you be augmenting them with subwoofers or anything?

[Dr.db]

Thanks, very kind of you!

I choosed the E-145, because it has been the most accurate bass-driver I have listened to so far. The 2235 for example had less slam and didn`t thrill me at all.
But I have to admit, the E-145 is a bit reserved in the very low end.

I will propably rise the bass response by 2-3db by using an active highpass-filter with a 2db-gain around the tuning-freq. with a q-factor of aprox. q=1,3....
My intention is to use this without subwoofers and to achieve relatively flat response to 40hz in listening room.

[Dr.db]

One thing I have always disliked with end-consumer speakers was the small stiffness of their enclosures. Their certainly are manufacturers that build sophisticated enclosures besides just looking good, but they are very few....

Im aware that every box will vibrate at some point no matter how much bracing had been used. But I believe it still is a good start to keep the enclosure as stiff as possible.



I sawed these squares (braces) out of 1inch thick birch plywood.
I have placed these in such way, that there isn`t more than 8 inch of enclosure wall without a brace.
Besides the achieved stiffness, it actually doesn`t need that much capacity....


I have to admit, it really was hard work to assemble all the parts.
Their where plenty of joints I had to glue.
To avoid drying of the glue at the first coated parts before finishing the assemble, I did split this process in 3 steps.
I glued all the braces together in 2 steps.
To enshure a good fit later on, I used the enclosure walls as a template while glueing the braces.



This is what the bracing workpiece looks like after glueing.
Quite peculiar, right!?



In the last step I joined the braces and the enclosure walls.
Likely we had plenty of strong clamps around, this made a good fit a lot easier...