Millercarbon's Mega Moab Mod Meander


One of the all time great automotive engineers, Norbert Singer, was a key player in every one of the 16 Porsche LeMans victories from 1970 to 1998. His dominance was such that at one point Porsche had won LeMans more than all other marques combined. This was all accomplished by building on the already solid foundation of Porsche production models. The air cooled flat 12 in the 917 was really two flat sixes combined to make 12. This car so dominated motorsport the rules had to be changed to stop it!  

So Norbert Singer modified Porsche production technology to extract the absolute most for racing. His legacy is today’s Singer Vehicle Design https://singervehicledesign.com Norbert doesn’t make for a very good car name so they called it Singer. What is a Singer? It is a modified Porsche. It is in essence a hot rod. What Norbert Singer did was make the most hot rod racing Porsche. What Singer does is take that to the next level, capturing every aspect of Porsche right down to excellence of design and aesthetics.  

I am not anywhere near the level of Singer. But that is the spirit of what we are doing: taking an already world-class design and hot-rodding it to be even better. Well, better for me anyway- or so we hope!

The early modders started with substituting off the shelf parts to get more power or less weight. That is pretty much all we are doing here. Would be cool if some day people are doing this with a lot more sophisticated approach. Maybe they will. Maybe even I will. For now though we have the current crossover project.

My approach is pretty simple: better parts sound better.  

This lesson was learned back in the late 90’s with Linaeum Model 10 speakers. The designer had a new tweeter and told me how to modify the crossover for it. Simple mod, one cap, one resistor. Bought the parts from Radio Shack, put it together, sounded like crap. Absolute horrid crap! Called him up, he said those parts are crap. Said Musicap, Vishay. But they measure the same? Just do it. I did. It worked. Even though they measure exactly the same, the sound difference is off the charts.  

Even though they measure exactly the same. There is a lesson here. For those willing to learn.

So this is the essence of it: Eric Alexander has made a speaker the equivalent of a Porsche 911. Even better: an affordable Porsche 911! But after a while with my 911, after learning what makes it drive and feel the way it does, it was only natural to change the shocks and torsion bar and other items to bring out even more of what I like so much about the 911.  

That is what we are doing here. Hot-rodding a speaker. Thank you Rick for the metaphor!  

The parts are on order. Next week the fun begins!
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Showing 3 responses by rushfan71

Chuck the sound will change (improve over time) as the caps settle in. 
I know there is a whole camp out there who have their opinion on that however that's what Bill mentioned in our conversations and I found him to be correct on that.
Miller,

I’ve completely disassembled my entire D.I’s. I had to build the xover for the tweeter array and the 2- 6inch mids outside the box.

The mids took 220uf so I used Mundorf Evo in oil.

The center tweeter and the surrounding array I used a few Audyne True Copper caps and Path Audio resistors. I’m using the same inductors for now

In the woofer section on the bottom, I removed all the insulation and replaced it with no rez. I also used Mundorf MPK caps and Mills resistors for the xover.

I intalled Dyna Mat (vibration control sheeting) to the cross braces behind the woofers.

I wired the each speaker with Duelund tinned copper wire of the appropriate size

If you have any questions or I can figure how to send you some pictures message me.

Grannyring was a big help with some questions that I had when I did my D.I’s. I was inspired when I saw that he had done a pair.

The results are astonishing compared to stock.
Let’s see if I got this pic posting thing right.

Here is the crossover for the upper section of my double impacts.

When the boxes are complete (parts on order) the wires coming from the drivers and out the rear of the speaker will be into one neat sheathed cable with each wire terminated with a male GR Research tube connector and the xover components will be soldered to wire connected to female GR conns. mounted to the boxes rather than the copper post units you see now, the components will be fastened with zip ties.

When finished they will be painted black along with the covers I made for the boxes.

The boxes are dove tailed drawer boxes.


https://postimg.cc/y3cvzHy2/7333bf4f