**** EDIT: Here is the Final Result! ****
And the OmniMic Response in Room with all 3 speakers overlaid.
**** Original Thread starts here:
This is the first thread I have ever created, I have been lurking around here a while and spending a lot of time in the Projector threads, now I have my vision set up (Sony 300ES / 120") and I plan to move on to my third DIY audio project and post some thoughts on the process here as I go.
This one is going to slowly begin the process of replacing my home theater speakers.
Some back story of my journey so far...
Here are a couple pics of my system...
So my first build was a PC speaker replacement. I had the amazing Logitech X530 for over 10 years as my PC sound, eventually got fed up with it and decided to tackle a simple 2-way project and 10" sub build to gain some knowledge about design after loitering the DIY forums for so long. They system consists of a Peerless 830860
5 1/4inch woofer and Vifa XT25
ring radiator tweeter. Crossing over 2nd order at 2800hz, They sound fantastic and I am just about to finish the veneer process with those after just being plain lazy with finishing that part for about a month. For the sub I am using a sealed enclosure with an SB Acoustics 10'' SB29SWNRX-S75-6 Woofer.
Here are some quick pics of the PC Speakers I built, you can see a vented 8 inch sub there, it also had a peerless 8 inch SLS woofer but it was crap, I also had a 100w Yung sub plate amp which literally fried and burned after 30 minutes at 1/3rd volume. I wasn't happy with either so I pulled them out and went 10inch sealed with a 200w Dayton Sub amp.
And the replacement 10 inch woofer. Much better! Suitable for PC audio
Anyway I will post the finished product in a few days so you all can see, they are almost finished with veneering.
Next, my father wanted a new center channel speaker which can match his ESS AMT-3 speakers, They are 3-way with currently 2x Dayton ST-255-8 drivers up to 250hz and then an Eminence Alpha 6a up to 750hz and the Heil AMT taking over from there. This is how it is from the factory. We decided on using those same drivers, but he found an Eton ER4 AMT driver on Ebay and ordered that so I set out to build that crossover which is the same except the Eton was crossing over at a much safer 1800hz. Sucess! It sound amazing. By this point I have purchases SoundEasy and used that to design the crossover. I has previously used Bassbox Pro and Xover Pro 3 for my PC Speakers and grew frustrated quickly with its lack of options, however it is AMAZING for quickly bashing a box design together and thus I use Bassbox pro for designing the enclosure and move to SoundEasy for the crossover part.
This is how the crossover looks for my fathers center channel. (Sorry no photos of the actual speaker right now.) you can see the Eton has a natural roll off on the high end. And yes, the impedance drops to 2 at one point... One obstacle with my father blindly buying that AMT was the fact that is was only 88db/1Watt vs the other drivers being around 92db, so in order to bring the system to a respectable sensitivity it looks like thats why the impedance drops so low at that point. Not to worry though, my father is driving those speakers with 500watt mono blocks so it will be fine.
Ok so back to me...
Lets just say that I absolutely fell in LOVE with AMT's. The sound... just so airy, effortless and clear. Tough to describe it. I wanted to use them for my next build... So some research led me to Beyma and their line of drivers. The TPL-150H AMT is a horn loaded 102db/watt monstrosity. That will be my tweeter, The Beyma 12p80Ndv2 will be my mid speaker and I will use two Faital 12FH520 -16ohm Woofers for the low end. I should end up with an 8ohm ~100db/watt speaker out of those and it should hopefully have some incredibly powerful dynamics for music and film.
Here are some designs of the enclosure I am going for the final final design will be very close to this, just getting all the calcs down to mm perfect for the CNC cutting.
Here is the box model in Bassbox Pro.
I will get these CNC cut in the next week or so and begin measuring the drivers in their finished enclosures so I don't have to do any baffle calculations at crossover build.
So, the Beyma side of things arrived, The Faital woofers are shipping from Italy on Monday. I had to hear the AMT's so I quickly plugged them into my tweeter crossover on my PC speakers for a listen. Amazing!
Thanks for listening guys, will update this thread again as the journey continues.
Feel free to ask any questions, chime in with advice, I will definitely be asking for advice as I get close to the crossover build.