The Javelin - 4 way digital active project

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Thanks for the links... I have seen most of them, after all, I have been reading through these forums for over 10 years now. 🙂

That is why I jumped in with such an ambitious project, I have been thinking about it for so long that I decided to just go for it and try to reach all of my goals in the first build. Ironically, this is also a point in my life where I have the fewest tools and the worst work space of all previous places I have lived, but it is still pretty decent and I will take my time and do the best quality work that I am capable of at least. I have two major lumber/hardware big box stores within 5 minutes of my house... a Home Depot and a Menards, so as I run into trouble I will just pause, make a store run, and then jump back into to it.
 
Some more progress:
 

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Looking good Greggo!

You've bought some fantastic drivers, so even if this project doesn't work out perfectly you have the parts to build something brilliant eventually.

Not sure if you are aware but as a word of caution. Never connect MIDs or tweeters to a MiniDSP system without protection caps. I've blown 3 drivers when I forgot in the past.

I was using an older 2x4 but the turn on/off thumps are killers. Sub's or 6.5" seem to handle it but I blew some Xt25 coils clean out of the gap once and fried an Alpair 7.3m coil, so ;P

I wish MiniDSP would provide more warning or a proper way to solve it on the board. Some sort of turn on mute perhaps.. The miniDC delay is not long enough to fully suppress it in my system.

Best of luck.
Dean
 
Thanks Dean. I believe this has been addressed by miniDSP across all their products now but I will be using power amp on last and off first to minimize the problem. Once I start getting ready for the DSP stage of the project I will double check on the forums and if folks are still reporting some issues or if I just think it is too easy to make a mistake during configuration I will add some caps in series. Trying to avoid that if possible though.
 
minidsp has a trick to minimize pops from early series, contact devteam. However it does not provide protection from rca cable connection/disconnection done with power amp on. This is a major BAM, I have mutilated two Fountek NeoCDs with it. Small mids are in danger too.

I recommed protective serial caps for tweeters, they are easy to compensate in eq if necessary.
 
Thanks Juhazi, I do appreciate the experience/warning. I have done some more reading on this and have decided to leave it alone for now, knowing that there is some risk. I am not worried about inadvertent connect/disconnect and using drivers that are fairly robust in relative terms. I plan on leaving the miniDSP 4x10 on all the time as well as the class D Dayton MA1260 power amp that I am using.

If I end up with a bad experience and have to replace anywhere from 1 to 4 domes after an incident, I will then reconsider... It is important to me to keep the signal from amp to driver as absolutely clean and highly damped as possible.
 
Here are some updates...
 

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and a quick mock up now that things are getting closer to done. Just about done the general glue-up stage but since I am using epoxy I have a whole bunch of scraping and sanding to do before I start painting and then getting everything wire up.
 

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There does not seem to be any more posts? How did your project go?

By a strange coincidence, when you were building this system, I was building something very similar.

The Darbari: new speaker project

The Darbari | DHANDANOUGHT.ORG | TCPIP

They have been my main audio system for six years now, and I'm selling it to a friend soon.

I have never faced any problems with turn-on thumps, perhaps because my amp has had speaker delay relays. The system has worked very well overall, and it sounds as good as the best commercial speakers I have heard anywhere in the world, at any price. If I were to do this, I'd do things a bit differently, but the basic 3-way approach and MiniDSP 4x10HD would stay.
 
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