DIY Speaker Kits, a good idea?

Great points mentioned here. 

You get tremendous value, in which performance and cost are a part of, building your own speakers..

You get to select cabinet material, crossover upgrades, wiring, binding posts, footers, etc... all to your taste from the very beginning. Big savings over buying speakers with these parts only to change them out. 

A hot build is Madisound’s TeXtreme 2-way. It gets down to 30hz and is easy to integrate into a room since it’s a 2-way. 

This cabinet is less intimidating than a floor stander. 

Minimal parts in crossover so speaker is very dynamic and has been reported to outperform speakers in 20K range. 

We made some Panzerholz versions of this cabinet in which we pinned (doweled) which makes it much easier for enduser to keep square while they glue/clamp up. 

It allows for others to get their hands dirty, which I encourage, that otherwise would not because of difficulty. 

Troel’s has some simple designs as well one might try. 

pindac,

Yes I believe Kaiser uses Pz for their bracing but not sure about baffles/side walls/top/bottom/back. Clicking the link you provided the image tells me no they do not. 

I have A/B/C tested MDF, Finnish birch, and Pz. In blind test you can distinguish a Pz cabinet over the others two quite easily. 

Without going into the many adjectives to describe Pz sonic merits the best way I can describe it is "It just sounds right". 

I have CNC machined many Pz cabinets, that the end user assembled, and despite the added cost not one has ever reached out stating they regretted using Pz. In fact the opposite is true. 

A DIYer reached out to me yesterday regarding a Linkwitz build in Pz.

From my experience having the mindset of no compromise with the objective of highest performance, you will save a lot of scratch upstream chasing cables, components, tweaks, etc...