Kraemer Designs D~400 Hypex NC400 Mono Amp Build

Hi Bob,
They have great bass for their size, i can turn them up very loud with no ringing (aluminum) or distortion. What i like the most is the highs and mid highs are very clear cut. No fuzz. Just clean sound :)

I have them crossed over at 90hz when i use my subs.
 
KraemerDesigns said:
Thanks Joe!

I'm probably the youngest at only 25 :P
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Great, young blood. I'm almost twice your age. It's really great to have you here. Any info on your projects - like your own website or blog? Put it out there for us. We are hungry for information.
 
-joe

Sadly no websites or blogs. Just thousands of pictures posted on various forums.

I should make a blog one of these days. I've got tons of old porojects and new ones to share.
 
Matt,

1. Great that you love the sound of your speaker's design.
* Just a remark: the front edges (sides), I think that they should be curved from their front face and going towards the sides. ...Because they abruptly bounce the high frequencies; which I don't believe to be a good idea. ...Rounded side edges would have been a better 'sound' design (mathematically measured and scientifically proven wise).
- I followed your thread right from their first conception, design, cutting, changes, and final stage. And I also read all the member's comments on them, but couldn't reply, as you well know, and that's what I thought and still think today.

2. Matt, I'll see if I can post a link on most of the stuff you produced in the last couple months or so. ...If you don't mind of course.
 
No problem. As projects progress, please feel free to share.

KraemerDesigns said:
-joe

Sadly no websites or blogs. Just thousands of pictures posted on various forums.

I should make a blog one of these days. I've got tons of old porojects and new ones to share.
Click to expand...
 
NorthStar said:
Matt,

1. Great that you love the sound of your speaker's design.
* Just a remark: the front edges (sides), I think that they should be curved from their front face and going towards the sides. ...Because they abruptly bounce the high frequencies; which I don't believe to be a good idea. ...Rounded side edges would have been a better 'sound' design (mathematically measured and scientifically proven wise).
- I followed your thread right from their first conception, design, cutting, changes, and final stage. And I also read all the member's comments on them, but couldn't reply, as you well know, and that's what I thought and still think today.

2. Matt, I'll see if I can post a link on most of the stuff you produced in the last couple months or so. ...If you don't mind of course.
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I have been told my front baffle with change the sound so may times now. They sound great. Danny Richie (GR Research) told me that it would effect the sound, I didn't believe him, so he tested this himself. He got a 3db bump in the upper frequencies. But one thing, he tested his speakers with a side edge protruding the front edge of the baffle, my side edges are in line with the front and not protruding past the tweeters face plane. So his test meant nothing to me.

Also placed hard material into the side edge and make it flat across the baffle and heard no differences in sound. It just not effect anything :)

No need to post a link bob, I'll make new projects and post them here. The NC400 build is almost done and i will post more pictures.
 
NorthStar said:
...Only positive criticism Matt. ...What I'd love to see is a professional audio reviewer like John Atkinson from Stereophile reviewing them.

And John is a member here.
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Unless he came here for a review, i would NEVER ship these speakers but i might be driving them down to Emofest this summer. I brought my TT~1 last year and Dan Luafman (Emtiva CEO) paid me $4,000 for it :)
 
Today i machined the front of the case, where my logo and model D~400 goes. It was a very fast cycle. It took 4 minutes and 30 seconds to complete.

Before operation.



After.



More pictures :) :)

















Next will be the back. I'll make all the holes for the connectors, also engrave "NCORE". I had planned on doing a very crazy logo back there but have decided to scale it way back, because of machine time and it is my case, the Ncore's are just inside. Lastly the bottom will be hallowed out and testing will begin :)
 
Today i machined the back where all the connectors go. I positioned the power switch vertically so it would be more natural to power it on and off.

Tomorrow i will start hogging out the bottom :)











Matt
 
Looking forward to seeing the finished case. It is cool to be able to watch your work in progress go from a solid billet to a completed amp-Thanks!.
 
Today i started the bottom. There was a lot to program and while machining i made a few changes because of clearance issues. Got one done and will finish the rest tomorrow.

Must have typed in the wrong number for the XLR connector because it doesn't go in that smooth but this is an easy fix. The model and program will be updated to allow a bigger hole for future batches. These 7 will just be ran again, it will only take seconds to cut a bigger hole for the XLR.

These cases weighed 29 1/2 pounds as raw stock, they ended up at 11 1/2 pounds after everything. A loss of 18 pounds from machining.

I took some pictures will some of the goodies inside, they are not really installed just a basic mock up.

Other then re machining the XLR connector hole, everything will work great!!

Here is the endmill that did 90% of the machining. A 3/4" 3 flute.





A picture i snapped while machining (note changes were made after this picture was shot).



Clean and out of the machine.









Goodies inside :)















Matt
 
KraemerDesigns said:
...

These cases weighed 29 1/2 pounds as raw stock, they ended up at 11 1/2 pounds after everything. A loss of 18 pounds from machining.

Matt
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Eighteen pounds multiply by seven equals 126 pounds of wasted metal particles?!!
...They went to nowhere?

* Matt, it's like being at school here; where we learn everything on how a high-end amp is built from scratch. ...Simply amazing and very educational.
 
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Absolutely beautiful work Matt. I can't imagine the amount of time it takes to make something like this. I hope you get a good price on all of that recycled aluminum! :D
 
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